Archive of Our Own

E class are in the middle of their monthly assassin training practical -their pe grades rest upon this-.

The mountain air in the deep valleys of Nagano always tasted different than the smog of Tokyo. It was crisp, carrying the sharp, pine-heavy scent of cedar and the faint, mineral dampness of the nearby river. For the students of Class 3-E, however, a change of scenery never meant a vacation or at least never meant a vacation where they could really relax.

"Check your footing on the loose shale, Nagisa," Rio’s voice cut through the quietness of the small, government-issue earpiece. "If your short legs make you slip up, then the noise will carry up the ridge line. And we both know that Octoperv's hearing is far superior to a normal human's."

Nagisa corrected himself, adjusting the strap of his standard-issue tactical vest, keeping his center of gravity low, pressing his back against the rough bark of a massive cedar tree and ignoring Rio’s rude remark. He took a slow, measured breath, letting his heartbeat decelerate into the quiet, rhythmic thrum he used whenever he was hiding his presence -whether intentionally or unintentionally-. To his left, the underbrush was thick, a tangled web of wild ferns and sharp briars that would have tripped up any ordinary junior high student.

But Class 3-E were not ordinary junior high students anymore.

"Copy that, Rio," Nagisa whispered into his collar mic, his voice barely louder than the rustle of the wind through the canopy. "Where are you now? I’m in position at the eastern perimeter of the grid. No sign of the target yet."

"He's probably buying gelato in Venice right now giving us some time to get into place before he beats us," a lazy, melodic voice chimes in over the comms link and for Nagisa it chimes in a couple of feet away.

Nagisa didn't even have to look to know who it was. A few yards away, casually draped over a thick horizontal branch ten feet off the ground, Karma Akabane was looking down at him. Karma wasn’t wearing his tactical vest properly; it was slung loosely over one shoulder like a discarded school bag, his signature black uniform blazer completely unbuttoned to reveal the casual red shirt underneath. He was turning an anti-sensei plastic knife over his knuckles with terrifying speed, the dull green blade a blur of movement against his pale skin.

"Karma, get down from there," Nagisa hissed, looking up. "If Koro-sensei does a sweep from the air, you’re completely exposed." The duo were supposed to be separate for a little bit before they met up here though Nagisa… Nagisa was a minute late. Not even a minute! He was 43 seconds late but… Nagisa knows his best friend and he knows that karma will take the mick out of him for this forever now.

"Let him sweep," Karma smirked, his sharp copper eyes gleaming with that familiar, sadistically cheerful light. He caught the knife by the hilt, pointing the rubber tip toward the northern ridge. "He’s currently distracted by the decoy traps Isogai and Maehara set up by the old logging cabin. Besides, if he flies over us at Mach 20, the wind shear will blow me right into a perfect aerial strike. I’ve been wanting to try that. Also… you’re lateeee~”

Nagisa sighed softly, a faint smile tugging at the corner of his mouth despite the tension of the exercise. That was the core difference between them. When Nagisa went into an assassination or a mock-battle game, he became a ghost, invisible, silent, waiting for the exact moment to strike from the shadows. When Karma entered the fray, he was a storm, he wanted the target to see him coming, just so he could watch the look of absolute despair on their face when they realized they couldn't stop him anyway. Also he was an asshole. An absolute asshole, who teases Nagisa about anything.

The "game" they were playing today was a localized search-and-containment simulation designed by Karasuma to test their endurance in dense wilderness. The rules were simple: avoid detection by Koro-sensei for three hours while attempting to secure three specific "supply points", which were actually just heavy plastic buckets of water placed at various coordinates in the forest. It sounded mundane, but trying to transport gallons of water through a rugged forest without spilling a drop while a supersonic octopus hunted you down was a brutal lesson in spatial awareness and stealth.

"Five minutes until the mid-point check," Itona’s voice came over the comms serious and blunt as always though not mocking for once. "The weather radar is showing an unexpected low-pressure system moving in over the peaks. If the cloud cover drops, visibility will decrease. Secure the final objective at the creek bed and retreat to the base camp."

"Hear that, Nagisa?" Karma dropped from the branch, landing on the damp earth with an eerie, total absence of sound that defied his large frame. stretched his arms over his head, a feline yawn escaping him. "Tentacle boss says it's time to wrap it up. Let's go grab that last bucket before the girls beat us to it. Nakamura’s been bragging about her stealth stats over the coms all morning, and I really don't want to hear her gloat over dinner."

"We are on the same coms karma and I have heard nothing from her you sure you arent just making something up?" Nagisa teased yet started checking his compass anyway. "The final bucket should be right at the bend where the creek narrows, just past the granite clearing. If we split the weight, we can make it back to the camp boundary in ten minutes."

“Ha come on now Nagisa if you cant pay attention to how late you are then how could you possibly pay attention to how her tone has been mocking all day. Now coem on we are already late cause of you!” Karma smirks as he jumps down to be right next to Nagisa.

“I- urghhh Karma I was only 30 seconds late thats barley even a minute.”

“Still latee though~ hehe”

Despite the teases the duo moves out in perfect tandem not practiced not staged but not unusual for the pair either. Even without talking, their movements were entirely synchronized, Nagisa leading the way, his small frame slipping through the dense foliage like a shadow, checking the treeline for any sudden changes in air pressure that would indicate Koro-sensei’s arrival. Karma trailed a few paces behind, his eyes constantly scanning the higher ground, his posture completely relaxed but his muscles coiled like a spring, ready to react to the slightest anomaly.

The forest around them felt almost… alive, the leaves whispering under a sudden, cool breeze that swept down from the higher elevations, the sky above, visible through the gaps in the heavy canopy, was turning a bruised, heavy shade of slate gray. The humidity rising rapidly, sticking to the back of Nagisa’s neck. Karasuma-sensei hadn't been kidding about the weather during his earlier warning; the mountains of Nagano were notorious for how quickly a clear afternoon could turn into a treacherous downpour.

As they neared the sound of rushing water, the trees began to thin out, giving way to massive, smooth blocks of gray granite that lined the banks of a shallow, crystal-clear mountain creek.

There, sitting perfectly upright on a flat stone right at the edge of the water, was the bright blue plastic bucket, filled to the brim with clear creek water.

Karma stepped out onto the granite, the smirk returning to his face as he tucked his training knife into his belt. "Look at that. Perfectly untouched. Looks like the monster hasn't sniffed us out yet nor have the girls beaten us yet."

Nagisa paused at the edge of the tree line, a strange, fleeting chill passing over him that had absolutely nothing to do with the approaching storm. He looked at the water in the creek, it was flowing normally, bubbling over the rocks, but the air felt oddly heavy, almost suffocatingly quiet. Something feels… something feels wrong.

"Hey, Karma," Nagisa called out softly, stepping forward. "Let's just grab it and go. The wind has stopped completely. I don't like the feel of this weather."

"Relax, Nagisa," Karma chuckled, strolling casually toward the blue bucket. "It's just a little rain. Unless your perfect pont tails cant handle a little downpour.” Karma giggles at his own joke as he bends down onto both knees right next to the bucket.

Normally Nagisa would laugh as well or perhaps lash out at karma -jokingly obviously his best friend's comments never truly bothered him- however today? Something as said before just feels wrong.

Nagisa took a single step out onto the smooth granite banks following karma’s lead, the rubber soles of his boots squeaking faintly against the stone. Usually, a mountain creek was full of white noise, the rushing water, the friction of pebbles rolling along the stream bed, the distant rustle of birds in the canopy.

But as Karmafully got down onto both knees settling into a crossed legged position facing the perfectly blue plastic bucket, something shifted.

It wasn't a loud noise or a sudden movement. It was a pressure. As an assassin so in tune with his bloodlust , Nagisa is hyper-sensitive to changes in the atmosphere - to the sudden, heavy weight of bloodlust or a predator entering the area. However this… this didn't feel like a person. Suddenly the air around the 2 boys felt incredibly thick, turning cold enough that his next breath bloomed into a faint white cloud in front of his face.

Behind him, deep in the thick oak tree line they had just exited, there was a sharp, distinct crack of a heavy branch snapping.

Nagisa spun around instantly, his hand dropping to the hilt of his rubber training knife. His eyes locked onto the dense ferns, his pupils dilated as he scanned the brush.

Was it Koro-sensei?

A wild animal?

A sudden ambush from another squad?

A sudden ambush from a random person?

An assassin who wants them dead?

His mother A monster?

He held his breath eyes trained onto the tree line, waiting for the rustle of leaves, the telltale yellow glow of their teacher's skin, or the sound of someone heavy moving through the shale.

He waited and waited.

A second passes in hours.

Yet… nothing moved. The ferns were completely still. The forest behind them was entirely dead. Frozen in the heavy humidity of the approaching storm.

Realizing the noise hadn't been followed by an attack, Nagisa let out the deep breath he was holding. "Karma, did you hear tha- "

He turned back around.

The question died in his throat.

The granite ledge was empty.

The blue plastic bucket was still sitting there, perfectly upright on the flat stone, the water inside completely undisturbed. But Karma wasn't sitting or standing next to it just as he had been just seconds before.

Nagisa blinked, his brain stalling for a fraction of a second as it tried to process the physical impossibility of what his eyes were seeing. He didn't immediately reach for his collar mic. He didn't panic. Karma was a prankster, a sadist who loved nothing more than catching people off guard, even if this seemed absolutely impossible, improbable, unnatural.

"Karma?" Nagisa called out, his voice dropping into a low, cautious register. He stepped fully out onto the granite, keeping his eyes moving from side to side.

"Come on. This isn't funny. If you're trying to bait Koro-sensei into an ambush using me as a distraction, at least warn me first."

Silence answered him.

“Come on Karma! This isn't funny, you know how much I worry about you!”

Nagisa began to search much much more frantically. Nagisa ran quickly to the edge of the creek, looking down into the shallow, crystal-clear water.

No splashes.

No ripples,

No muddy tracks showing that anyone had waded across to the opposite bank or maybe fallen in silently… somehow.

He spun around, checking the smooth granite surfaces. There were no wet scuffs from Karma's boots, no signs of a sudden sprint, and absolutely no rustles or laughs from the bushes indicating he had ducked back into the woods.

To disappear that quickly, in less than the single second it took Nagisa to turn his head and turn back… Karma would have had to move faster than a speeding bullet. Even for someone with Karma's insane reflexes, it was a physical impossibility to cover that much ground without making a sound or leaving a single footprint on the damp stone.

The reality of the situation suddenly hit Nagisa finally setting in, his heart rate finally starting to spike, increasing and never dropping down.

"Karma!" he shouted, his voice echoing off the granite walls of the creek bed.

He bent down, looking at the exact spot where his friend had been standing just moments ago. The smooth stone was slightly damp from the humidity, but as Nagisa stared at it, a cold prickle of genuine dread traveled up his spine.

There were no footprints. Not even the faint, dusty outline of Karma's boots.

Before he could even process the thought, a sudden, violent gust of wind slammed into the valley, so powerful it nearly knocked him off his feet. The sky above violently churned, dropping low until a thick, blinding mountain fog rolled over the ridges like a wall of solid white.

Within seconds, visibility dropped to less than five feet, the sky opening up, pouring down a torrential, freezing rain that stung Nagisa’s face and instantly blurred his vision.

The storm had arrived with an unnatural, terrifying speed.

Finally, with his hands trembling from the sudden drop in temperature, Nagisa slapped his hand against his collar mic. "Karasuma-sensei! Miss Bitch! Rio! Anyone! Karma’s gone! He’s just- he’s just gone!"

"Nagisa, drop the bit," Rio’s voice cut through, clear but laced with an immediate, sharp groan. "If this is another one of Karma's stupid setups to draw Koro-sensei into the open using you as damsel-in-distress bait, I’m not buying it. My boots are already soaked and I am not getting involved in this.."

"No! Rio, listen to me!" Nagisa screamed into the mic, his eyes darting wildly from the left bank to the right bank searching. The absolute stillness of the blue plastic bucket was making his stomach turn. "He didn't run! I turned my head for less than a second because a branch snapped behind me in the oak trees. I turned back around and he was just - the stone is empty! There are no footprints! There's no mud! Karma!"

A heavy, authoritative click cut off Rio’s frequency. Karasuma’s - a man overseeing the coms but not supposed to be getting involved at all- voice filled the line, cold, sharp, and instantly demanding order. "Nagisa. Calm down. Breathe. You are an assassin in training; control your heart rate and report clearly. Did you visualise an external assassin? Was there an ambush?"

"N-no, Karasuma-sensei," Nagisa gasped, clutching his head with one hand while his other hand kept the mic pressed so hard against his throat it bruised the skin. He was trying to force his heart rate down into that rhythmic, silent thrum, but the sheer physical impossibility of the empty ledge kept shattering his focus.

"No one else. No bloodlust. The air just... it got incredibly thick and cold. Like a refrigerator door opened right next to us. And then he was gone. He was on his knees right next to the water bucket, and then he wasn't."

There was a five-second pause on the line. The only sound was the sudden, violent roar of the wind picking up across the Nagano valley, rattling the leaves above Nagisa’s head.

"Akabane," Karasuma’s voice returned, switching frequencies to the master channel. His tone was still firm, but the slight, professional clip at the end of his syllables gave away the first microscopic crack of anxiety. "Akabane, respond. The stealth exercise is temporarily paused. Identify your coordinate and check in."

Nothing but the heavy hum of the open channel answered.

"Karma, cut the crap," Karasuma’s voice hardened, dropping into the low, dangerous register he used when the class was pushing their luck during hand-to-hand combat drills.

“Wait whats going on?”
“Karma’s missing?”
“Are we supposed to stop hiding?”
“Is the game still on?”

Other students voices fill the communication line but still no cheeky or chastised voice of the missing student. No karma.

"This is a mandatory government evaluation. If you are deliberately withholding your position to compromise the grading matrix, I will personally see to it that your practical exam is marked as an automatic zero. You will spend the entire summer break in isolation detention at the main campus. Respond immediately."

The silence that followed was suffocating. On the standard comms, twenty other students were listening, their breath caught in their throats. Karma loved to push buttons, and he loved to mock authority, but he never ignored a direct, third-level disciplinary warning from Karasuma. It wasn't his style; he preferred to look Karasuma in the eye when he was breaking the rules.

"Akabane!" Karasuma’s voice barked again, the anxiety finally breaking through the facade of the stoic government agent. It was a sound none of the students had ever heard before, Karasuma was losing control of the perimeter, losing control of this situation and of his students. "This is an order! Break cover now!"

The line remained dead.

“KARMA! ANSWER ME!”

Still b the line remains dead.
"Karasuma-sensei," Itona’s blunt voice sliced into the frequency, completely devoid of its usual mocking tone. "The barometric pressure just plummeted twelve millibars in three minutes. The weather radar is completely red. The low-pressure cell isn't moving across the peaks, it's forming directly on top of the grid."

…I asked my geographer friend for thai please ignore if any of this stuff is wrong :(...

"All students, listen to me carefully do not talk," Karasuma's voice slammed through the earpiece, entirely abandoning the protocol of the game, the authority in his tone was absolute, cold, and heavy with a sudden, protective dread. "The practical exam is officially cancelled. Repeat, the simulation is dead. Stop playing immediately. Do not attempt to secure any remaining supply points. Do not move toward the creek where Nagisa and karma are."

Nagisa looked down at his boots. The water from the creek rising rapidly as the rain increases, was already creeping over the granite ledge, swallowing the spot where Karma had been sitting.

"Isogai, Kataoka, assume squad command," Karasuma ordered, the sound of heavy equipment rustling in the background of his feed indicating he was already moving toward the creek. "Every student is to pair up immediately. Link arms if visibility drops. You move in pairs of two or higher back to the primary logging road. If you lose sight of your partner for even five seconds, you yell. Do not stay in the brush. Move now!"

The radio didn’t click off; Karasuma kept the line wide open, allowing the heavy, panicked breathing of twenty eight terrified teenagers to bleed into a collective chorus of compliance.

"Understood, Karasuma-sensei," Isogai’s voice broke through the noise, his natural leadership taking over despite the tremor in his tone. "Maehara, is with me. Okano, grab Fuwa you are down the river from each other! Everyone, don't let go of each other!"

"Nagisa, stay exactly where you are," Karasuma barked over the master channel, the background roar of an engine revving violently indicating he had thrown himself into the driver's seat of the command jeep. "Do not move from that granite clearing. I am tracking your earpiece's GPS signal. I will be at your position in four minutes."

"Karasuma-sensei, you don't understand," Nagisa gasped, his knees shaking so violently he had to drop onto the slick, wet stone to keep from slipping into the raging water. The creek was no longer bubbling; it was roaring, a frothing brown serpent eating away at the granite ledge fed by the torrential down pour abovea. "The water is rising too fast! It’s already covering the bucket!"

The heavy plastic bucket, which had been filled to the brim with clear water, was suddenly clipped by a racing piece of mountain debris. With a sharp crack, the bucket tilted, its contents spilling out and mixing into the muddy deluge before the entire blue container was violently swept downstream, vanishing into the gray fog within a fraction of a second.

"Nagisa! Head for the high ridge take the bucket with you!" Karasuma’s voice shouted through the earpiece, but the signal was deteriorating at a terrifying rate. The sheer volume of water dumping from the sky was creating a wall of density that the radio frequencies couldn't pierce. "The logging road is- kzzzt- flooding! Do not- static-

The earpiece died. Not a temporary pop, but a flat, dead hiss.

Nagisa was entirely alone.

The white mountain fog had dropped so low it felt less like vapor and more like a heavy, suffocating wet blanket pressed against his face. Visibility was down to less than three feet. He couldn't see the tree line anymore. He couldn't see the opposite bank.

The world had shrunk down to the three feet of slick granite beneath his boots and the roaring, terrifying sound of a mountain flash flood chewing at his toes.

"Karma!" Nagisa screamed one last time, his voice instantly swallowed by the thunderous crash of the storm.

He didn't wait. His assassin instincts, the ones that kept him alive in the dark, told him that if he stayed on this rock for another sixty seconds, the river would take him too.

He turned blindly toward where he thought the tree line was, throwing his hands out in front of him. His boots skidded on the mud, his nails clawing desperately into the wet earth as he dragged himself up the steep embankment, scrambling away from the water.

Branches slapped his face. Brambles tore at his tactical vest. He couldn't see his own hands in front of him, but he kept climbing, the freezing rain stinging his eyes until he couldn't tell if he was crying or just drowning on dry land.

It took Koro-sensei exactly twelve seconds to find him.

A massive, circular shockwave of displaced air shattered the fog, blowing the torrential rain away in a perfect, three-meter radius. A heavy, red, weeping, wet tentacle wrapped securely around Nagisa's waist, lifting him off the muddy slope with effortless strength.

Nagisa didn't fight it. He looked up, expecting to see his teacher's usual bright yellow face, or perhaps the worried green stripes of a panicked educator.

Instead, Koro-sensei’s face was a deep, solid, charcoal black, the color of absolute, terrifying fury. His large white eyes were narrowed into sharp, lethal slits, and his tentacles were vibrating so fast they hummed like a high-voltage power line.

"Where is Karma?" Koro-sensei’s voice lacked any of its usual sing-song rhythm. It was a deep, guttural resonance that rattled the bones in Nagisa’s chest.

"He's gone," Nagisa sobbed, his fingers desperately clutching the fabric of Koro-sensei’s wet academic robes pulling comfort from his presence yet not enough to save his mental breakdown from continuing. "He didn't run, sensei! I turned my back because a branch broke, and when I turned back, he was just... deleted! He's gone!"

Without a word, Koro-sensei exploded into motion.

The sonic boom shattered the remaining windows of the valley's old logging cabins miles away. Nagisa was tucked tightly against the creature's chest as Koro-sensei tore through the storm at Mach 20.

For thirty minutes straight, the ultimate lifeform searched. He flew in tight, microscopic grid patterns across the entire Nagano mountain range. He used his advanced thermal vision, his supersonic hearing, and his acute sense of smell to scan every cave, every ridge line, every hollow tree trunk, and every single inch of the raging riverbed.

He covered a fifty-mile radius four hundred times over.

When he finally landed back at the main base camp, dropping Nagisa gently onto the covered porch of the command cabin, Koro-sensei’s charcoal face slowly faded into a dull, mottled gray, the color of total, helpless despair.

His internal thermal imaging had been completely blank. There was no heat signature matching a human teenager anywhere in the mountains.

 

Day 1 after the disappearance:

The rain had stopped at exactly 4:12 AM, but the moisture stayed, hanging in the air like a thick, cold sweat.

By dawn, the clearing where E classes duo had been last night was now bathed in a dull, watery light, however five miles away up the treacherous mountain paths, the usually warm and cheery campus of Class 3-E felt like a tomb.

There were no morning greetings. There was no cheerful chalk drawing on the blackboard. The hyper-advanced, supersonic creature who usually spent his pre-class hours grooming his tentacles or flying to Hawaii for a morning coffee was sitting perfectly still on the roof of the old schoolhouse. His skin was still a faint, sickly gray, his tentacles limp against the weathered cedar shingles. He was listening. He has noy yet stopped listening. But the mountain only gave back the sound of dripping leaves. No sounds of karma, no sounds of a struggle.

Karasuma hadn't taken off his tactical vest since the previous afternoon. It was stiff with dried mountain mud, the fabric smelling of stagnant river water and mineral rot. He stood before a map of the Nagano grid pinned to the staff room table, a red marker clutched so tightly in his hand that the plastic casing was beginning to whiteout under the pressure.

"The Ministry of Defense is calling it an 'unexplained operational casualty due to terrain instability,'" Karasuma said, his voice entirely flat, devoid of its usual professional cadence, it was the voice of a soldier who had seen men vanish in trench lines, but this wasn't a trench line. This was a junior high school practical exam. "They are sending two high-altitude recon drones by midday to run side-scanning radar through the limestone fissures. They think he fell into a sinkhole."

"A sinkhole doesn't swallow a boy without leaving a single pebble out of place, Karasuma," Irina Jelavić said. She was sitting on the edge of the desk, her knees pulled tight against her chest. The glamorous, untouchable assassin bitch was gone; instead she wore a simple gray tracksuit, her blonde hair tied back in a messy, practical knot no makeup, no skin care no nothing but a desperation to find her stupid annoying brat of a student.

Her fingers were trembling slightly as she held a lukewarm cup of black coffee. "I’ve worked with human traffickers, cartel bosses, and black-market extraction teams. If someone took him to hurt us, they would have left a shell casing or a footprint to mock us. There was no bloodlust, Karasuma. I didn't feel a thing from the valley floor. It was like... the mountain just cleared its throat and he was gone."

"We don't deal in folklore, Irina," Karasuma snapped, though the lack of real anger in his voice showed how close he was to his own limit, he slammed the marker down onto the table. "He is a student under my direct supervision. If he was taken by an external asset using advanced optical camouflage or acoustic dampening, it means our security has been compromised from the inside. If he simply... ran..."

He couldn't finish the sentence. Everyone in the room knew Karma Akabane didn't run. From anything. He didn't hide from a challenge. And he certainly wouldn't leave Nagisa behind in a flash flood just to play a prank.

In the corner, Koro-sensei’s massive silhouette shifted against the window. The gray color of his face didn't change, but his large round eyes flared with a brief, dangerous red light. "My tracking systems are perfectly calibrated to the molecular signature of every student in this class, Karasuma-san. I know the exact zinc content of their uniform buttons. I know the iron levels in their blood. When I flew through that valley at Mach 20, I didn't just look with my eyes. I looked with everything I am. Karma's physical signature didn't fade out. It didn't move away. It simply ceased to register within the boundary of our atmosphere."

"Don't start with that nonsense," Karasuma growled, rubbing his temples where a fierce tension headache was starting to take root. "He's on that mountain. We just have to look harder. The storm must have just wiped away his scent so that you couldn't see it at the time. He cannot teleport.”
…

In the main classroom, the desks had been pushed back into their standard rows changed from their pre game tactic circle from yestyreday, but nobody was sitting properly. Their usual morning chatter, the sound of knives being sharpened, notebooks flipping, laughter over comic books, had been completely replaced by the rhythmic, low murmur of shared dread.

At the front row, Isogai sat with his chin resting on his interlaced fingers, his eyes fixed on the empty wooden chair near the back window. The leadership that had kept the class together during the muddy retreat the night before felt heavy, like a lead weight in his stomach.

"We should have stayed in our teams," Maehara muttered from the desk beside him, his voice rough from lack of sleep. He was systematically tearing the eraser off a yellow pencil, bit by small bit, until the desk was covered in pink crumbs. "If we had just stayed within visual range... if I hadn't been laughing at those stupid decoy traps by the logging cabin..."

"Stop it, Hiroto," Kataoka said from across the aisle, her voice sharp but thin. She was holding a rag, obsessively cleaning her anti-sensei knife over and over until the green plastic was gleaming. “We all decided that r to split for the stealth phase was the best idea and that we should only reconvene at certain points in duos not as a whole. It wasn't your fault. It wasn't anyone's fault. No one could have possibly predicted this. It was no one's fault."

"Then whose fault is it?" Rio’s sharp clearly angry and upset voice cut through the room like an icicle.

She was sitting backwards in her chair, her chin resting on the wooden backrest, staring directly at Nagisa. Her usual playful, mischievous expression was entirely gone, replaced by a raw, hollow look that made her look five years older. Her boots were still stained with the dark gray mud from the creek bed.

"I told him to drop the bit. On the radio, I told him I wasn't buying it. I thought he was just being an asshole like usual. I thought he was trying to make us look stupid in front of sir. Working with karma to freak us all out then reveal it was a stupid prank a stupid assassination idea." She reached up, her fingers twitching against her collar where her earpiece had sat.

"I should have listened to how his voice sounded. Nagisa wasn't acting. I know what he sounds like when he’s just worried, and I know what he sounds like when he’s... like that."

Nagisa didn't look up when his name was mentioned. He was sitting at Karma’s desk, his arms flat against the wood, his small frame looking smaller than ever under the oversized green tactical vest he hadn't bother or hadnt had the energy to remove. His hair was still slightly damp, the blue twin tails coming loose at the sides, small strands hanging limply around his pale face.

His mind was stuck in a five-second loop.

*The sound of the branch cracking.*

*The ferns staying perfectly still.*

*The turn.*

*The empty stone.*

Every time he closed his eyes, the image returned, but his brain kept trying to insert details that weren't there- a splash he must have missed, a shadow moving into the trees, a laugh from the brush- but there was nothing. Just the bright blue bucket, sitting perfectly upright on the granite clearing, the water inside completely untouched until the flood took it.

"He's not dead," Itona said from the back corner, his voice blunt and mechanical, breaking the rising tension between Rio and Nagisa. He was adjusting the small internal gears of a broken recon drone with a precision screwdriver, his eyes completely narrow. "If he were dead, there would be crows. The mountain has thousands of them, and they always go to the scent of a carcass within three hours of a termination event. The valley is quiet. The birds are still hiding from the pressure drop."

"That's a horrible way to put it, Itona," Sugino said, his voice cracking as he leaned against the wall, a baseball gripped tightly in his right hand. He wasn't throwing it against the wall like he usually did when he was nervous; he was just squeezing it until his knuckles turned white. "But... you're right. He's too smart to just die in a ditch. He’s probably sitting in some cave right now, laughing at how we’re all freaking out."

"He wouldn't leave his phone," Fuwa murmured from three rows back, her face pale as she looked down at a notebook where she had been trying to map out the timelines of the disappearance cross referencing them based on anime and manga stereotypes. "Karma never leaves his phone behind especially when he is in the middle fo a new game. It was still on the floor right like at the cabin where we where meeting up?"

"No," Nagisa spoke for the first time all morning, his voice so quiet the entire room instantly went dead silent to hear it. "The phone was in his blazer pocket. But the blazer was slung over his shoulder when we were talking by the creek. When I looked back at the rock... the blazer was gone too. Everything he was wearing. The white school shirt, the black trousers, the school shoes. It wasn't like he slipped out of his clothes. It was like... everything that occupied that space just stopped being there."

Terasaka slammed his fist against his desk, the loud *BANG* making several of the kids jump.
"Dammit! This is stupid! We’re assassins, right?! We have an octopus that can fly at Mach 20 and a government black-ops guy leading us! How can a kid just vanish from a two-mile grid while we’re all watching?!"

He glared at the ceiling, his face flushed with a mixture of anger and genuine, unadulterated fear. "Hey! Octoperv! Get down here and tell us you found something! You’re supposed to be a god or something, aren't you?!"

The ceiling didn't answer. The quiet dripping of the gutters was the only response.

…

 

Down the mountain, in the pristine, concrete-and-glass complex of the Kunugigaoka main campus, the disappearance of Karma Akabane was treated not as a tragedy, but as a dangerous system error one which has the potential of ruining at least temporarily Mr Asano’s regime.

In the Chairman's office, the air conditioning hummed with a sterile, expensive purr. Asano Gakuho sat behind his wide mahogany desk, his fingers laced together beneath his chin, his purple eyes fixed on the man standing across from him, a junior representative from the Ministry of Education who looked like he was about to faint into his own silk tie.

"The police are requesting permission to interview the students of the main building who shared a class with the Akabane boy last year," the representative said, his voice trembling as he adjusted his glasses. "The media has already picked up the name. A highest-scoring student in a low brow track disappearing during an unauthorized 'educational retreat' in the mountains... the board is worried about the winter enrollment figures, Chairman."

"The police will be given exactly what they require to complete their paperwork, and nothing more," Chairman Asano said, his voice a smooth, low bar of absolute control. Not a single hair on his head was out of place. To him, Class 3-E was a necessary garbage dump to maintain the school's competitive edge, but a student vanishing under government custody was a variable that threatened the stability of his entire educational ecosystem.

"The Akabane boy has a history of violent behavior and truancy. If the press asks, we will emphasize that he was undergoing a specialized behavioral correction program in an isolated facility our official statement is that hiis disappearance is a tragic reflection of his unstable domestic profile."

"And... and the family?" the representative swallowed hard. "His parents are currently in India on an engineering consult. They haven't responded to our overseas cables."

"Then they will be notified through the proper diplomatic channels when there is something substantial to report," Asano said, turning his chair slightly to look out the wide plate-glass window toward the distant, gray silhouette of the Nagano peaks.

"For now, the school's curriculum will proceed without interruption. My son's assembly this afternoon will focus on the importance of mental fortitude during the upcoming mock exams. We will not allow the erratic behavior of a single drop-out to disrupt the focus of our top five percent."

Outside the office, in the high-ceilinged corridors of the A-Class wing, Asano Gakushuu stood with his back against the lockers, his student council armband gleaming under the fluorescent lights. His core circle the Virtuosos were gathered around him, their voices hushed but sharp.

"Did you hear?" Ren Sakakibara whispered, leaning in. "They are saying Akabane got washed down a ravine during that storm yesterday. The police had five trucks go up the mountain road this morning before the main gates opened."

"He probably just picked a fight with some local gang and hid in the woods to avoid the suspension," Seo muttered, crossing his arms. "He always thought he was untouchable just because his grades were decent despite his attitude. Glad he finally got his cumupence for that pretentious attitude of his."

Gakushuu didn't say anything for a long time. He looked down at the student registry clip in his hand, his eyes scanning the name *Akabane, Karma* near the top of the suspended list. He hated Karma. He hated the boy’s casual disregard for structure, his smug indifference to the hierarchy that Gakushuu had spent his entire life mastering. But most importantly he hated how he could see himself in Akabane.

But Karma was a genius. He was a predator who understood the nature of power, even if he chose to wield it like a brute with a club.

"He wouldn't get caught in a rainstorm," Gakushuu said, his voice cold enough to shut his friends up instantly. "Akabane is a sadist, not an idiot. If he’s gone, it’s because he chose to go, or because someone found a way to remove him from the board."

He looked toward the path that led down to the old mountain campus, his eyes narrowing. "And if the End Class let him drop... then they’re even more useless than I thought."

…
End of day 1 missing:

Back at the main camp cabin, the daylight had fully died, returning the mountain to the black, wet shadow of the forest.

The government had set up three massive portable floodlights around the creek bed, their intense white beams cutting through the trees like giant fingers, but from the cabin porch, they only looked like small, distant stars lost in the fog. The roar of the water had lessened, returning to a heavy, low rumble that vibrated through the floorboards of the schoolhouse.

The class had refused to go home to their families. Karasuma had tried to arrange a bus, but Isogai had simply stood at the door, flanked by Terasaka and Chiba, and told him that until the grid was cleared, nobody was leaving the mountain. Karasuma, looking at the raw, dark hollows under his students' eyes, hadn't argued.

Now, the boys' dormitory room -formely the home ec classroom- was silent.

Nagisa lay on his futon, staring up at the water-stained patterns on the ceiling. Beside him, Karma’s futon meticulously laid out ready for him to come back and need a space in this class sleep over, the white sheets perfectly crisp, the pillow uncreased. It felt like a small, square void in the middle of the crowded room.

From the hallway, the low, rhythmic sound of a dry tentacle dragging against the wood signaled Koro-sensei’s return from his eighth search of the night. There was no sound of wind shear. No sonic boom. He was flying slower now, his energy stores depleted from hours of forcing his body against the high-altitude pressure cells.

"Nagisa," a voice whispered from the dark. It was Sugino, his face turned toward the blue-haired boy's mat. "Are you awake?"

"Yeah," Nagisa whispered back.

"Do you think... do you think he was scared?"

Nagisa closed his eyes. He remembered the feeling of the air right before the branch snapped. The strange, unnatural coldness that felt like an artificial frost blooming in his chest. He remembered how Karma had been laughing, bending down on both knees with that stupid, arrogant confidence that usually made him seem ten feet tall.

"No," Nagisa said, his voice steady even as a single tear finally broke free and ran down his temple into his hair. "He didn't have time to be scared. He didn't even know he was leaving."

 

Day 5:

The fifth day did not bring rain, but it brought an oily, low-hanging mist that smelled faintly of diesel exhaust and wet cedar. The grand, militarized theater of the first forty-eight hours had begun to rust around the edges. The bright yellow tape the Ministry of Defense had strung between the ancient oaks was sagging into the mud, weighted down by the moisture that never truly left the Nagano valleys.

In the faculty room of the old mountain schoolhouse, the three adults sat in a triangle of isolation that had grown increasingly small as the hours bled together.

Karasuma sat at the low table, a heavy government-issue satellite phone pressed against his ear. The plastic casing was slick with his own sweat. His tie was loosened by two inches, his collar unbuttoned to reveal the dark, purple bruises where his tactical vest had chafed his collarbones over five days of unremitting terrain sweeps. He had not slept for more than ninety minutes at a stretch since the blue bucket went down the river.

"I don't care about the corporate schedule in Mumbai," Karasuma said, his voice dropping into a low, terrifying vibration that made the glass jars on the science shelf rattle faintly. "This is not a truancy notice. This is a Tier-One domestic disappearance within a state-monitored national security perimeter. Your son is—"

A sharp, mechanical click cut him off from the other side of the world.

Karasuma didn't slam the phone down. He slowly lowered it, his thumb pressing the end-call button with a deliberate, rhythmic force that nearly cracked the digital screen. He set the device flat on the wooden map table, right over the coordinate marker for the granite ledge.

"They hung up," he said.

Irina Jelavić let out a short, jagged laugh that sounded more like a cough. She was sitting on a low stool by the iron stove, her legs tucked beneath her, her fingers methodically turning a silver pocket knife over and over in her lap. Her standard designer blouse was gone, replaced by an olive-drab tactical sweater she had borrowed from one of the Ministry logistics officers. "What did you expect, Karasuma? I’ve seen their financial profile. Those two spend eleven months of the year building high-voltage power grids for foreign syndicates. To them, Karma isn't a child; he’s an expensive asset they left in a Tokyo apartment with a platinum credit card to keep him out of their hair. When I called the mother’s personal secretary two hours ago, she told me—with a straight face, mind you—that 'Master Karma' has always been prone to dramatic absences and they would appreciate it if the government stopped interrupting their board meetings until there was a body to sign for."

"That is enough, Irina," Karasuma muttered, though there was no real conviction in his reprimand.

"No, it's not enough!" she hissed, her blue eyes flashing with a sudden, vicious light as she stood up, the knife clicking shut in her palm. "I am a killer, Karasuma. I have left people in ditches from Prague to Johannesburg. But when I look at that boy's file—when I see that his parents haven't even requested a flight itinerary back to Narita after five days of their only child being missing in a mountain wilderness—it makes me want to find them before I find him. They don't care. They think he’s just being difficult. They think he’s... he’s just Karma."

From the dark corner behind the blackboard, a wet, heavy rustle signaled Koro-sensei’s presence. He had spent the last seven hours hanging upside down from the rafters of the gym, his skin a dull, chalky white that looked like dried plaster. He had stopped wearing his academic cap; it sat on the desk, its gold tassel dipped in a puddle of spilled tea.

"The maternal pulse rate during the short conversation Karasuma-san had yesterday was completely flat," Koro-sensei said, his voice devoid of its usual high-pitched squeak. It was deep, heavy, and mechanical. "I listened through the digital relay. There was no spike in cortisol. No micro-tremors in her vocal cords. She truly believes he is simply exercising his autonomy. They have raised him to be a ghost, and now they are surprised that the house is empty."

Karasuma rubbed his eyes with both hands, his palms dragging against his three-day stubble. "The parents are a secondary problem now. The search grid is collapsing from the bottom up." He reached out and flipped over a document from the Ministry of Home Affairs. "As of six o'clock this morning, the local volunteer fire departments from the Nagano foothills have officially withdrawn their personnel. The forty-man civilian tracking team from the valley has packed up their tents. We are down to twelve government agents and whatever hours Koro-sensei can pull before his tissue begins to degenerate from thermal stress."

"Why?" Irina walked over to the desk, her boots striking the floorboards with an angry, hollow thud. "The storm cleared two days ago. The river is back within its banks. Why are they pulling the men out?"

"Because of him," Karasuma said, his teeth clicking together as he spat the word out. He didn't need to name the man.

Everyone in the room knew who had spoken at the Tokyo municipal district assembly the previous afternoon. Chairman Asano Gakuho had stood before the regional educational oversight committee, his tailored gray suit immaculate, his face a perfect picture of sorrowful, institutional regret. The broadcast had been short, but its efficiency had been lethal.

“A tragic demonstration of personal instability,” Asano had told the microphones, his voice dropping into that deep, magnetic register that made parents nod in collective submission across the prefecture. “The Akabane youth has consistently rejected the rigorous moral structure of Kunugigaoka. While the school prays for his safe return, we must recognize that certain behavioral profiles are inherently prone to flight. A boy who carries weapons to class, who mocks the authority of the state, who chooses the isolation of the mountain building over the community of his peers... we cannot ask our local volunteers to risk their lives in the limestone crevices for a child who has chosen to walk away from his obligations.”

"That bastard," Irina whispered, her fingers curling around the silver casing of her knife until her knuckles turned the color of bone. "He killed the search. He didn't use a blade or a poison; he just used thirty seconds of television time to tell three hundred people that Karma wasn't worth the mud on their boots."

"It was a calculated logistical strike," Karasuma said, his eyes fixed on the map. "The civilian volunteers look at Asano like he’s the high priest of the middle class. If the great educator says the kid is just a delinquent runaway who wanted to skip his midterms, the local shopkeepers aren't going to spend their mornings crawling through briars. They think they’re being tricked by a spoiled brat from the capital."

"And the Ministry?" Irina asked.

"The Ministry follows the public interest curve," Karasuma replied coldly. "They can't justify spending twelve million yen a day on a drone sweep when the national news is framing the subject as a standard juvenile correction case. They’re already preparing the paperwork to reclassify the status from 'Endangered Missing' to 'Voluntary Departure.' Once that paper is signed, the radar units leave."

Koro-sensei’s round face didn't change color—it remained that same flat, dead gray—but his tentacles suddenly tightened around the edge of the teacher's desk, the old wood groaning and splintering under a force that could have crushed a main battle tank.

"Chairman Asano understands the game very well," Koro-sensei murmured, his large white teeth catching the light of the kerosene lamp. "If Karma is found dead on that mountain under government supervision, the reputation of his institution is damaged. If Karma is never found, but the world believes he ran away because he was broken, the hierarchy remains intact. The system is always right, Irina-san. The student who fails the system must be the one who is flawed."

"I don't give a damn about his system!" Irina shouted, slamming her hand onto the table, spilling the remaining cold tea across the Nagano grid map. "He’s fifteen! He’s fifteen years old and he’s out there in the dark somewhere, and that gray-eyed monster is treating him like an accounting error!"

"Calm down!" Karasuma’s voice barked like a pistol shot, his hand coming down over hers, pinning her wrist to the wood until she stopped shaking. His eyes were bloodshot, the dark rings beneath them looking like old bruises. "We don't have the luxury of an emotional breakdown, Irina. The civilian search is dead. The government search is on a seventy-two-hour timer. That means the only thing standing between that boy and total erasure is this room. We are the teachers of Class E. If we lose our heads, the kids down the hall will lose theirs."

The transition between the staff room and the classroom was a physical descent into a lower pressure zone.

When Karasuma opened the door, the air inside was thick with the smell of cheap kerosene and cold grease from the lunch boxes that had been left half-eaten on the front benches. The twenty-seven remaining students of Class 3-E were there, but they had abandoned the traditional structure of rows. They had grouped themselves into small, tight clusters, like soldiers in a freezing trench trying to preserve their collective body heat.

In the corner by the window, the "Triangle of Strategy" was completely silent.

Isogai and Kataoka sat on the edges of two desks, their student council armbands looking frayed. Between them, Mimura and Okano were trying to verify the radio logs from Day 1 on a portable cassette deck, but the tape had stretched from the moisture, rendering Karasuma's recorded orders into a series of long, guttural groans.

"It’s no use," Mimura said, his voice dropping into a flat, tired cadence as he stopped the reels. "The background frequency from the rain is too loud. You can't hear the exact second Nagisa's signal drops. It just... it sounds like a radio falling into a well."

"He didn't fall into a well," Terasaka growled from three desks away. He was sitting with his massive legs sprawled out, his large hands methodically tearing a gray eraser into tiny, uniform cubes with his fingernails. His shirt was unbuttoned at the throat, his collar stained with sweat. "I spent four hours yesterday checking the old well behind the logging shack. I dropped a heavy iron weight down into the shaft. It hit stone at twenty feet. Empty. No clothes, no shoes, nothing. He’s not down there."

"Nobody said he was, Terasaka," Yoshida muttered from the seat next to him, his fingers grease-stained from spending the night cleaning the spark plugs of his motorbike, as if the mechanical repetition could stop his mind from wandering back to the creek. "But we have to look somewhere. Sitting here listening to the radio hiss is making me want to smash the windows."

"Then go smash them," Rio Nakamura’s voice came from the middle of the room.

She hadn't moved from her spot since the previous evening. She was still sitting backwards in her chair, her chin resting on her crossed arms, her eyes fixed on the bottom of the blackboard where Koro-sensei’s old attendance charts were pinned. Her hair was greasy, the blonde tips looking dull under the yellow light of the hanging lamps.

"Go on, Terasaka," she repeated, her voice lacking its usual sharp, mocking edge. It was just hollow. "Smash the glass. See if that brings him back. Maybe if you make enough noise, the people down at the main campus will stop looking at us like we’re a bunch of murderers."

"Nakamura," Isogai warned softly, stepping forward.

"What?" she snapped, her head jerking up, her eyes wide and bloodshot as she glared at the class representative. "You saw the papers this morning, didn't you? My mother called me from Tokyo at five. She asked me if it was safe for me to keep coming up the mountain. She said the Chairman told the district board that Karma was 'unstable.' She asked me if he had... if he had tried to hurt anyone before he ran." She let out a dry, rattling breath. "They think he’s a lunatic. They think he’s like one of those kids who goes off into the woods with a pipe bomb. They don't know him at all."

"We know him," a quiet voice said from the front row.

Nagisa hadn't shifted his posture in three hours. He was sitting with his hands tucked into the pockets of his oversized school jacket, his blue twin tails hanging loose, several strands sticking to his pale forehead from the humidity. His eyes were dry now—the tears had stopped sometime around Day 3—but they had a flat, glassy sheen that Karasuma recognized from his days training recon recruits in the dark valleys of Hokkaido. It was the "thousand-yard stare," the point where the human brain stops reacting to external stimuli and begins to live entirely within its own internal survival loop.

"Nagisa," Sugino said, reaching out a hand to touch the boy’s shoulder.

Nagisa didn't flinch, but he didn't turn his head either. "He was thirty seconds late," Nagisa whispered, his voice so thin it seemed to float through the quiet room like a cobweb. "He told me I was late because I was forty-three seconds behind the fireteam schedule. But he was late too. He stayed on that branch because he wanted to see if I’d notice him. He always did that. He’d hide just enough to see if I’d look for him."

He reached into his pocket and pulled out a small, green plastic object. It was the rubber blade of Karma’s training knife. The tip was slightly bent from where Karma had been twisting it against his knuckles on the branch. Nagisa had found it caught in the briars five yards up from the granite stone during his solo search on Day 2.

"He didn't run away," Nagisa said, his fingers tightening around the green plastic until his short nails turned white. "If he ran, he would have taken the knife. He would have taken his blazer. He wouldn't leave his things in the dirt for me to find. He knew... he knew how much I hate looking for things in the dark."

The room went completely silent again.

Kayano, who had been sitting two rows back with her hands wrapped around a cold thermos of barley tea, suddenly let out a low, shuddering breath and hid her face against her desk. Her small shoulders shook rhythmically, but she didn't make a sound. She was trying to cry silently, the way they had been taught to do during the covert endurance drills, but the muffled wetness of her breaths was more disruptive than a scream.

Yada moved over to her instantly, wrapping her arms around the smaller girl’s back, her own eyes bright with tears she was trying to hold back for the sake of the collective morale. "It's okay, Kaede... it's okay..."

"It's not okay," Hazama's voice came from the shadow of the back row, her tone dropping into that low, witch-like register that usually accompanied her horror stories, but there was no theatricality in it now. She was holding a heavy, leather-bound volume of regional folklore she had taken from the town library before the search teams pulled out. "The old texts call this valley the Kamikakushi ridge. The place where the boundaries thin out when the pressure drops. It’s happened seven times since the Meiji restoration. A woodcutter goes out to check his traps; the rain comes down; the family finds his axe leaning against a cedar tree with the blade still sharp. No bones. No clothes. The mountain just takes what it wants."

"Shut up, Kirara!" Fuwa yelled, her voice cracking as she stood up so fast her knees slammed against the iron frame of her desk. "This isn't a manga! There are no spirits! There are no monsters! It’s a physical event! Karasuma-sensei said there’s a rational explanation for the satellite data! If we start talking about gods and curses, we’re... we’re just giving up!"

"I’m not giving up," Hazama said, her dark eyes reflecting the dull yellow of the lamp as she slowly turned a page of the old book. "I’m just identifying the target. An assassin doesn't fire into the fog until he knows what kind of skin he’s trying to pierce."

The door to the faculty room opened, and Karasuma stepped into the classroom, followed by Irina.

The students didn't rush toward him the way they had on Day 2 or Day 3. They didn't look at his hands to see if he was carrying a new map or a radio log. They simply watched him with twenty-seven pairs of old, tired eyes, waiting for the institutional hammer to fall.

Karasuma walked to the center of the podium, his boots making a heavy, solid sound that seemed to ground the room back into reality. He looked at Isogai, then at Nagisa, and finally at the empty desk in the back.

"The civilian search has been suspended due to the weather forecast and regional administrative adjustments," Karasuma said, his voice level, using the cold, clear language of a military briefing. He didn't sugarcoat it; he knew these children had seen too much death in their training to be put off by diplomatic lies. "The Ministry of Defense has given our squad seventy-two hours of exclusive access to the high-altitude radar feed before the drones are reassigned to the maritime border."

A low murmur passed through the room—not of anger, but of confirmation. They had expected this.

"But that does not change our directive," Karasuma continued, his voice rising slightly, cutting through the low hum of the class's despair. He leaned forward, his large hands planting themselves firmly on the edge of the podium. "Class 3-E is an independent operational unit. Our physical endurance, our tactical observation, and our capacity for systematic clearing are superior to any civilian rescue group in this prefecture. We have three days of technical support. We have a instructor who can move at Mach 20 when the cloud cover allows for safe low-altitude flight."

He looked directly at Terasaka, then at Rio, forcing them to look back into his eyes.

"We are not going back to Tokyo," Karasuma said. "We are going to divide the remaining twelve square kilometers into four quadrants. Group A, led by Isogai, will take the eastern drainage basin. Group B, led by Nakamura, will take the logging roads. You will carry standard-issue signaling flares and three days of dry rations. If the school board calls your homes, my office will handle the legal waivers. Your education under my supervision does not include leaving a man behind because the Chairman thinks he’s a difficult case."

For the first time in forty-eight hours, Rio Nakamura’s shoulders straightened. She looked down at her muddy boots, then up at Karasuma, a tiny, hard glint of her old self returning to her eyes. "Understood, Karasuma-sensei. If we find him, can I give him a black eye before we put him in the ambulance?"

"You can do whatever you want to him, Nakamura," Karasuma said, a faint, casi-invisible softening appearing around the corners of his mouth. "As long as you bring him back to my desk to sign his detention slip."

Beside him, Koro-sensei let out a long, low whistle that sounded like steam escaping an old train. His color began to shift, very slowly, like ink spreading through water from that dead plaster gray back into a deep, dark orange. The stripes weren't there yet, but the life was coming back into his skin.

"I have already prepared sixteen boxes of high-protein nutrient bars for the field kits," Koro-sensei said, his tentacles moving with a small fraction of their usual speed as he began to stack small, silver-wrapped bricks on the front desk. "And I have checked the local weather cells. The low-pressure system will break in thirty-six hours. When the sun hits the ridges, my thermal arrays will be able to penetrate the limestone cavities to a depth of fifteen meters. We have not lost him, he is merely... testing our patience, as he always does."

Nagisa looked down at the green rubber knife blade in his hand. He didn't join in the small, sudden surge of conversation that broke out as Isogai began to sketch out the new fireteam grids on the corner of the board. He just tucked the piece of green plastic back into his vest pocket, right next to his compass and the note he and karma had been writing to each other like stupid kids.

Five days, Nagisa thought, his hand pressing against his ribs where his heart was finally beating in that quiet, rhythmic, dangerous thrum. You've been out there for five days, Karma. You better have a good excuse for making me use my tracking stats on you.

 

….

Day 21

The Teshio River did not belong to the gentle Japan of the travel brochures. Running through the northernmost reaches of Hokkaido, it is a cold, muscular ribbon of glacial runoff that carves its way through walls of black volcanic slate and ancient, dense forests of Sakhalin spruce. By late afternoon, the river didn’t reflect the sky; it looked like liquid charcoal, churning with gray froth wherever it struck the jagged teeth of the riverbed.

Daisuke Sato knew every tooth in this river.

At forty-two, Sato was built like a block of weathered larch wood-thick-shouldered, short-legged, and covered in the permanent salt-and-iron smell of the northern wilderness. A former specialist within the Hokkaido Prefectural Police’s alpine rescue unit, he had retired to the quiet, grueling work of running heavy commercial rafts and whitewater expeditions for extreme tourists. He was a man who believed in gravity, buoyancy, and the cold hard reality of a two-bladed paddle. He didn’t believe in miracles, and he certainly didn’t believe in ghosts.

Today, he was piloting a heavy, sixteen-foot inflatable gray Achilles raft through the "Dragon’s Throat" , a Class IV stretch of whitewater that was currently swollen by the mid-summer snowmelt from the Kitami mountains.

"Keep your weight high on the high-side!" Sato roared over the thunder of the water, his voice a gravelly bark that easily cut through the roar of the rapids. His thick hands, encased in scarred neoprene gloves, dug his heavy steering oar into the left eddy, twisting the massive raft just three inches to the left of a half-submerged boulder. "Do not look at the hole! Look at the tongue of the current! If you stare at the rock, you’re going to hit it!"

Behind him, four amateur paddlers-salarymen from a Sapporo electronics firm who had paid far too much money to pretend they were adventurers let out a collective, terrified yelp as a wall of forty-degree water slammed over the bow. They were drenched, their faces pale beneath their bright yellow helmets, their hands gripping the safety lines with the white-knuckled desperation of men who had suddenly realized that nature didn't care about their corporate titles.

"Sato-san!" the lead paddler, a mid-level manager named Tanaka, screamed as he wiped gray foam from his goggles. "The rapid ahead! Is that the final drop?!"

"That’s the 'Cauldron'!" Sato called back, his eyes already scanning three hundred yards downstream where the river narrowed between two vertical pillars of black slate. The water there didn't flow; it dropped, folding over itself in a massive, recirculating hydraulic feature that could trap a log for weeks. "We’re going to take the right channel! It’s tight, but it avoids the main hole! When I say 'all forward,' you give me everything you’ve got! Don't look down!"

The raft surged forward, the thick rubber hull flexing as it hit the tongue of the rapid. The noise here was total, a deep, bass-heavy thrum that vibrated through the soles of Sato’s neoprene boots. The air was cold, carrying the sharp, iron scent of pulverized rock and wet pine.

Sato stood slightly, his knees bent to absorb the bucking of the raft, his eyes locking onto the exit route past the black pillars.

Then, his brain stuttered.

An experienced river guide’s eyes are trained to look for anomalies, a piece of driftwood that could puncture the floor, an unusual ripple indicating a hidden rock, a flash of red that might be a lost life jacket from a group upstream. But what he saw sitting on the vertical shelf of the left pillar didn't fit into any of his mental schemas.

It was a shape. A small, dark shape crouching on a ledge of smooth, black volcanic rock that was barely three inches above the frothing line of the water. The rock wall rose thirty feet straight up into the dense canopy behind it, smooth as glass from centuries of flood friction. There was no trail down to that ledge. There was no boat. There was no equipment.

Sato blinked against the spray, his grip on the steering oar tightening. *An animal? A young bear?*

The raft swept closer, entering the shadow of the slate canyon. The white foam of the rapid swirled around the base of the pillar, and the details of the shape finally resolved themselves through the gray mist.

It wasn't an animal. It was a boy.

He was sitting with his knees pulled tightly against his chest, his back pressed against the wet, black stone wall. He wore no helmet, no life jacket, and no protective gear. He was dressed in a simple, dark uniform jacket that was soaked through, the fabric clinging to his thin frame like a second skin, and a casual red shirt underneath that was dark with river filth. His bright, coppery-red hair was plastered across his forehead in wet, jagged spikes.

Sato didn't recognize him. He had no reason to. The news from the capital didn't interest him, and the posters of a missing junior high student from Nagano - over a thousand kilometers to the south hadn't reached the small logging towns of the northern interior. To Sato, this was simply an impossible body in a lethal piece of water.

"What the..." Sato muttered, his professional mask slipping for a fraction of a second. The boy was staring straight ahead, his copper eyes wide, but they weren't looking at the raft. They weren't looking at anything. They were completely blank, fixed on the opposite wall of the canyon with a terrifying, hollow intensity.

"Sato-san!" Tanaka screamed from the bow, his paddle swinging wildly as the raft hit the first lateral wave of the Cauldron. "The rock! We’re drifting left!"

The distraction was nearly fatal. The current, caught in the throat of the canyon, was drawing the heavy rubber boat directly toward the vertical ledge where the boy was sitting. If the raft hit that shelf at twelve miles an hour, the rubber would split, and the four salarymen would be thrown into a washing machine of recirculating white water.

"Back paddle! Right side, back paddle!" Sato roared, his instincts kicking back into overdrive as he threw his entire weight against the steering oar. "Left side, give me two hard strokes forward! Now! *Now!*"

The salarymen panicked. Tanaka missed the water entirely, his paddle clicking against the side of the boat, while the man behind him dug his blade in too deep, nearly pulling himself over the gunwale. The raft shivered, its momentum slowing, but the nose swung heavily to the left, the gray tube scraping hard against the black slate pillar just six feet below the boy’s ledge.

"Hold the line!" Sato shouted, his eyes locked on the boy above him. "Tanaka! Drop your paddle and grab the bow line! We have a jumper! We have an extra!"

"What?!" Tanaka looked up, his eyes bulging as he finally saw the red-haired teenager crouching on the rock. "Where did he come from?!"

"Shut up and prepare to haul!"

Sato managed to wedge the stern of the raft into a temporary micro-eddy, a tiny pocket of reverse current behind a projection of the pillar. The boat bucked violently, the gray tubes hissing as they ground against the stone, but for a few seconds, they were stationary, trapped in the eye of the rapid.

The boy was less than four feet away now.

Up close, Sato could see the terrifying reality of his condition. The boy’s skin wasn't just pale; it was a translucent, sickly gray, the color of a fish belly. His lips were blue, his chest rising and falling in short, shallow gasps that made his frame shudder against the stone. He was violently hypothermic; by Sato’s estimation, the boy had been in or near this forty-degree water for hours, if not days. His bare fingers were clawed into the microscopic fissures of the slate, his nails bleeding where they had dug into the rock.

"Hey!" Sato called out, his voice dropping into the firm, calming tone he used for panicked rescue victims. "Kid! Can you hear me?! Don't move! I’m going to throw you a line!"

The boy’s head jerked toward the sound. The movement wasn't human or not entirely at least, it was sudden, sharp, like a bird reacting to a gunshot. His wide, scared and confused eyes locked onto Sato, but there was no relief in them. There was no recognition of a savior.

Instead, a look of pure, primal confusion twisted the boy’s face. He let out a low, ragged sound from the back of his throat, a dry hiss that sounded like a cat backing into a corner.

"Stay back," the boy croaked. His voice was completely ruined, dry as sand, the words barely forming over his cracked lips. "Where... where is the chart? The... the mid-point check."

"He’s crazy!" Tanaka yelled from the bow, his hands shaking as he tried to untie the safety rope. "Sato-san, the current is picking up! The eddy is breaking!"

"Shut up, Tanaka!" Sato growled, his eyes never leaving the teenager. The boat shifted beneath him, the reverse current losing its grip on the stern. The gray tube began to slide backward out of the pocket. If they lost this position now, they would be swept down the final hundred yards of the canyon, and the boy would be left behind on a rock that would be underwater by nightfall.

"Kid, listen to me!" Sato reached out with his left hand, his thick fingers extended, his body leaning precariously over the edge of the raft while his right hand fought to keep the steering oar wedged into the rock fissure. "The river is rising! You need to drop into the boat! Now! Give me your hand!"

The boy looked at Sato’s hand, his pupils dilated until the copper iris was almost gone. He looked down at the gray rubber of the raft, then at the four yellow helmets of the salarymen. His brow furrowed, a deep, agonizing line of frustration breaking through his blank expression. He was trying to remember. Sato could see the physical effort of it in the way the boy's jaw clenched, his teeth chattering so hard a small trickle of dark blood began to ooze from his lower lip.

"The bucket..." the boy whispered, his eyes rolling back slightly as his head lolled against the slate wall. "The blue... it didn't ripple. Nagisa... where did you put the stealth matrix? Karasuma-sensei will... he’ll give me a zero..."

"He’s talking gibberish!" Tanaka cried, his voice reaching a hysterical pitch as a lateral wave slammed into the bow, lifting the front of the raft two feet into the air. "Sato-san! We’re going over! We have to pull out!"

"Hold your positions!" Sato roared, his voice cracking under the strain. His shoulder joint was screaming where the oar was forcing his weight against the river’s push. "Don't you dare touch that water! Left side, lean in! *Lean in!*"

The salarymen threw their weight toward the rock face, stabilizing the raft for one more second.

Sato took the chance. He abandoned the steering oar entirely, trusting the weight of the men to keep the boat pinned, and lunged forward onto the high gray tube, his thick arms reaching up toward the ledge.

"Come here, you little idiot!" Sato grunted, his fingers catching the thick, wet wool of the boy’s black school jacket.

The response was instantaneous and violent.

The moment Sato’s hand made contact, the boy didn't reach back; he struck out. Despite his frozen limbs, despite the obvious exhaustion that should have left him paralyzed, the teenager's right hand flashed forward with a speed that Sato’s alpine-trained reflexes could barely register. It wasn't a wild swing of a panicked child; it was a precise, structural strike aimed directly at the soft tissue of Sato’s throat.

Sato's head jerked back instinctually, the boy's fingers grazing his windpipe with enough force to make him gag.

"What the-!" Sato gasped, his balance wavering on the wet rubber tube.

The boy was on his feet now, his back still pressed against the stone, but his posture had completely changed. The hollow, confused look was still in his eyes, but his muscles were coiled like an adder. His hands were raised in a loose, defensive guard that looked horribly professional—the stance of a street fighter who knew exactly how many pounds of pressure it took to break a human clavicle.

"Identify your unit," the boy hissed, his breath rattling in his throat as he glared down at Sato. The copper eyes were bright now, but it was the brightness of a fever, a manic delirium that had replaced his consciousness. "You're not... you're not from the Ministry. Did the Chairman hire you? Did... did Asano send you to clear the board?"

"I’m a river guide, you crazy brat!" Sato yelled, his own anger flaring through his panic as the raft gave a heavy, ominous lurch backward. The eddy was completely dead now; the main current of the Teshio had caught the bow, and the boat was beginning to turn sideways into the mouth of the Cauldron. "Tanaka! Forward stroke! Both of you, give me everything right now or we’re all going into the drink!"

The salarymen screamed and began to thrash the water with their paddles, their movements uncoordinated but enough to check the raft's backward slide for three seconds.

"Look at me, kid!" Sato screamed, his face turning red as he lunged forward again, ignoring the defensive stance. He didn't have time for a fistfight with a lunatic teenager on a three-inch ledge. "You’re freezing to death! You don't know where you are! If you stay on that rock, you die! Do you understand that?! *You die!*"

The word *die* seemed to strike the boy like a physical blow.

He blinked, the manic light in his eyes suddenly fracturing, revealing the massive, terrifying void of his confusion underneath. He looked down at his own hands—at the bleeding nails, the gray skin, the wet black sleeves. He looked at the rushing black water of the Teshio, then back at Sato's weathered, angry face.

"Die?" the boy repeated, the word sounding small and foreign in his mouth. "No... I have to... I have to kill him by March. The... the graduation..."

His knees simply gave out.

The hypothermia, held at bay for a few seconds by the sudden spike of adrenaline, reasserted its grip with a crushing finality. The boy’s eyes rolled back, his lids fluttering as his body went completely limp, his shoulder sliding down the smooth face of the slate pillar toward the frothing river below.

"Gotcha!"

Sato threw himself completely over the gunwale, his thick arms wrapping around the boy's torso just as his legs slipped into the cold gray foam. The weight of the teenager was surprising he was thin, but his bone structure was dense, his muscles heavy like wet rope.

"Tanaka! Help me haul!" Sato roared, his boots losing their grip on the slippery floor of the raft as he was pulled downward by the river's suction.

The salaryman dropped his paddle and scrambled backward, his hands catching the back of Sato’s life jacket while Sato dug his fingers into the boy's belt. Together, with a collective, guttural heave that smelled of fear and river water, they dragged the limp, soaking form of the amnesic junior high boy over the gray tube and into the bottom of the raft.

The boy hit the floorboards like a sack of wet salt, his red hair spilling across the puddle of water that had collected in the center of the boat. He was completely unconscious now, his jaw slack, his chest barely moving beneath the dark red shirt.

"We’re clear!" Tanaka screamed, pointing downstream. "Sato-san, the boat is turning!"

Sato didn't look at the boy. He couldn't. He scrambled back to the stern, his hands grabbing the heavy steering oar just as the raft was swept out of the micro-eddy and thrown headfirst into the main drop of the Cauldron.

"High side! High side!" Sato bellowed, his muscles cracking as he forced the nose of the boat back into the tongue of the current. "Paddle forward! Give me three strokes and we’re through!"

The raft hit the bottom of the hole with a massive, booming thud that threw six inches of freezing water over everyone. The gray rubber flexed, the boat shuddering as it fought against the recirculating wave, then, with a sudden, smooth surge of speed, it broke through the foam and shot out into the wide, calm tailwater of the canyon.

The roar of the rapid instantly dropped behind them, replaced by the quiet, steady hiss of the river running through the wide gravel bars of the northern valley.

Sato let out a long, ragged breath, his shoulders dropping as he let the current carry the boat toward the gravel bank on the right. He didn't drop his oar until the bottom of the raft ground softly into the gray stones of the shore.

"Tie us off," Sato said, his voice shaking just enough for Tanaka to notice.

He dropped to his knees in the center of the boat, his thick hands coming down onto the boy's chest. The skin beneath the wet red shirt was ice-cold—so cold it felt like touching a winter trout.

"Tanaka, get the emergency space blankets from the dry bag," Sato commanded, his fingers searching for the carotid pulse in the boy's neck. It was there, but it was slow, erratic, like a watch with a broken spring. *Thump... thump... pause... thump.*

"Is he... is he going to make it?" Tanaka asked, his hands trembling as he struggled with the plastic clips of the waterproof gear bag. "Sato-san, who is he? How did he get out here? There are no roads for twenty miles."

"I don't care who he is," Sato said, his voice hard as he began to rip open the boy's wet black jacket to get to his bare skin. "He’s a kid, and he’s about ten minutes away from cardiac arrest."

As he pulled the heavy wool jacket off the boy's shoulder, something fell out of the wet pocket and clicked against the aluminum frame of the raft floor.

Sato looked down. It was a small, green plastic object. It looked like a toy knife, the rubber blade slightly bent at the tip, the handle embossed with a strange, stylized emblem of a crescent moon and a round, smiling face with two small tentacles beneath it.

Sato didn't pick it up. He threw the silver space blanket over the boy's shivering chest, his thick palms beginning the rhythmic, heavy friction rubs to force the blood back toward the teenager's heart.

"Hold his head up, Tanaka," Sato muttered, his eyes fixed on the pale, sharp face of the stranger who had just tried to kill him with his bare hands in the middle of a Class IV rapid. "And get the satellite radio. Tell the base camp we have a Category One medical evacuation. Tell them we found something that shouldn't be alive."

The northern wind swept down from the spruce forests, rattling the silver foil of the space blanket, but the red-haired boy didn't move. He lay in the center of the gray boat, a thousand kilometers from home, his lips moving silently in his sleep as he repeated a single name over and over into the empty air of Hokkaido.

"Nagisa... Nagisa... where is… what happened?"

… day 21 in E class

The dawn on the twenty-first day was the worst kind of clear.

For nearly three weeks, the mountain behind Kunugigaoka had been wrapped in a protective shroud of gray mist and heavy downpours, but today, the sun rose like a cold brass coin over the ridge. It illuminated every detail of the old campus with unmerciful clarity, the rotting cedar shingles on the gym roof, the deep ruts in the dirt where the government trucks had left weeks ago, and the two rows of worn, muddy boots lined up on the gravel porch.

Inside the classroom, the atmosphere was thick with the sharp smell of waterproofing wax and insect repellent.

Nobody was sitting at a desk. The room had been transformed into an staging area for a military sweep. Four heavy topological maps of the Nagano grid were pinned to the blackboard with anti-sensei kunai knives, their surfaces heavily scarred with red grease pencils marking out the areas that had already been cleared and the small, steep sectors that hadn't.

"Listen up," Isogai said, his voice husky from three weeks of shouting over river currents and mountain winds. He stood by the teacher’s podium, a green tactical knapsack slung over one shoulder. His uniform blazer was gone, replaced by a dark windbreaker with reinforced elbows. "This is the final sector. The Ministry gave Karasuma-sensei until noon today before they officially pull our satellite monitoring clearance. That means we have exactly five hours to clear the limestone crevices behind the third ridge."

"We’ll clear it," Terasaka growled from the back row. He was methodically stuffing boxes of high-calorie protein paste into his pockets, his large chest breathing heavily. His face was dark, sunburned, and hollowed out from twenty days of manual labor. "I don't care if we have to dig through the rock with our fingers. If that red-haired bastard is hiding in a cave just to make us look bad before the midterms, I’m going to drag him down by his collar."

"He’s not hiding, Terasaka," Rio Nakamura said softly. She was sitting on the edge of the front desk, her legs dangling, her fingers tightening the laces of her hiking boots. Her usual sharp, mocking energy had been ground down into something flat and functional. She didn't look at the empty desk in the back window anymore. None of them did. It had become a blind spot they all collectively avoided to keep from losing their focus.
"If he could have walked back, he would have done it on Day Two just to laugh at our faces. We're looking for a recovery now. We all know the rules."

The word recovery hung in the air like a drop of oil in a glass of water. Nobody disputed it. At twenty-one days, the survival charts Karasuma had left on the staff room table were definitive: without a shelter, without clean water, the human body didn't last three weeks in the Nagano interior.

In the corner, Nagisa was checking the battery on his handheld radio. His movements were slow, rhythmic, and perfectly precise. He had grown thinner over the last three weeks - if that was even possible for a boy his size- , his small frame looking almost skeletal under his gear vest, but his eyes were completely clear. The panicked boy from the creek bed was gone; he had retreated into the cold, silent shell of an assassin. He knew exactly how to track a target even if that target was his best friend, and even if the trail had been cold for twenty days.

"Nagisa," Sugino whispered, leaning in beside him with a heavy wooden walking stick. "You okay?"

"The battery is at eighty percent," Nagisa replied, his voice level and entirely devoid of inflection. "If we stay within two kilometers of the ridge, the signal should hold. If I drop offline, don't look for me. Just follow the line toward the eastern ravine."

"Nagisa, that’s not what I- man please talk to me I get it we all… we are all worried but I cannot have you breaking as well, I cant I just cant lo-"

BANG!

Suddenly, the door to the classroom flew open, the heavy wood slamming against the plaster wall with a violent CRACK that made half the class instinctively reach for their training knives.

Karasuma stood in the doorway.

He looked like a man who had been dragged through a rock crusher. His shirt was unbuttoned at the collar, his tie completely missing, and his dark eyes were bloodshot to the point of looking bruised. He was holding the heavy government satellite phone in his right hand, the red digital light on the casing blinking rapidly. It was clear that he was half way dressed when whatever news this is appeared.

The room went dead silent. The sound of Maehara zipping his pack froze midway up the track.

For three weeks, every time Karasuma had opened that door, his face had been a mask of professional, military stoicism. But right now, his jaw was clenched so tightly that the muscles in his cheek were twitching, and his breath was coming in short, ragged bursts through his nose.

"Stand down," Karasuma said.

Isogai blinked, his hand still on his pack strap. "Sensei? The noon deadline... we still have five hours to clear the third ridge-"

"I said stand down, Isogai," Karasuma repeated, his voice cracking slightly before he dropped it back into its deep, authoritative register. He raised the satellite phone, his fingers trembling just enough for Nagisa to see. "The search is over."

A collective, cold knot formed in twenty-seven stomachs at once. Kayano's hands dropped into her lap, her face turning the color of milk. Terasaka’s eraser crumbs spilled onto the floor as his grip loosened. They had trained for this moment. They had told themselves they were ready for the official notice of termination. But the reality of it felt like a physical blow to the chest.

"They... they called it?" Sugino asked, his voice breaking into a thin, child-like squeak. "The Ministry... they’re reclassifying him?"

"No," Karasuma said. He took three steps into the classroom, his heavy boots striking the floorboards like lead weights. He looked directly at Nagisa, his eyes wide and burning with an expression none of them had ever seen on the government agent before. It was an expression of pure, unadulterated shock. "An hour ago, a commercial whitewater raft on the Teshio River intercepted a casualty on a rock shelf inside the slate canyon."

He stopped, taking a deep, shuddering breath that seemed to tear at his lungs.

"The subject was hypothermic, amnesiac, and violently combative. He was transported by emergency helicopter to the intensive care unit at the Asahikawa Municipal Hospital." Karasuma let out a sound that was half-sob, half-laugh a rough, choked noise that he instantly suppressed. "The local police just verified the dental prints and the signature on his school jacket. It’s Karma."

The silence that followed was total. It was a silence so heavy that the ticking of the old clock on the back wall sounded like artillery fire.

"Hokkaido?" Rio Nakamura’s voice was barely a whisper, her eyes wide as she stared at the map on the wall. "That's... that's over a thousand kilometers away. That’s the northern island. Karasuma-sensei, that’s impossible. He went missing in Nagano."

"I know it's impossible, Nakamura," Karasuma said, his voice dropping into a low, fierce vibration as he slammed the phone onto the podium. "The logistics don't exist. There are no train records, no highway camera matches, and no flight manifests that match his description. According to every physical law of this prefecture, he should be dead in that creek bed. But he isn't. He’s in a high-security medical ward in Asahikawa, hooked up to a core-warming unit."

"Is he... is he okay?" Nagisa asked.

He hadn't moved. His hand was still resting on his radio, his face completely pale, but his fingers were twitching against the plastic casing.

"He’s alive," Karasuma said, his eyes locking onto the blue-haired boy. "His core temperature was thirty-one degrees when they pulled him out of the rapid. He has severe tissue damage from the cold, his nails are gone from climbing the slate, and the doctors say his cognitive function is... fractured. The only thing he said to the rescue team before he went under was a series of tactical coordinates that match our old training schedules."

From the ceiling above the blackboard, a sudden, violent rustle shook the rafters.

Koro-sensei dropped down onto the floorboards with a heavy THUD, his skin no longer the dead plaster gray of the previous weeks, but a wild, erratic pattern of bright pink and furious black stripes. His tentacles were whipping through the air like a bundle of high-voltage cables, his large round eyes glowing with a terrifying, yellow luminescence.

"A supersonic transport," Koro-sensei murmured, his voice dropping into that deep, mechanical resonance that usually preceded a Mach 20 departure. "Karasuma-san, the airspace over Hokkaido is currently clear of military drills. If I use the high-altitude jet stream over the Sea of Japan, I can have three students in Asahikawa within forty-two minutes."

"You can't fly into a civilian hospital at Mach 20, you idiot! We are not risking any of the students lives especially with weather as temperamental as it has been recently." Karasuma barked, though the lack of real anger in his voice showed how close he was to his own limit.

"The Ministry of Defense is already scrambling a transport jet from Yokota Air Base. They want to know how a state-monitored student crossed three prefectures during a national security lockdown without triggering a single radar line."

He reached down, picked up the phone, and looked at the class.

"Sugino, Nakamura, Nagisa pack your civilian clothes. You’re coming with me on the transport. The rest of you..." Karasuma looked at the twenty-four students who were still standing in their field gear, their faces a mixture of wild relief and lingering horror. "Go home. Clean your gear. The search is over. Karma is safe now i promise we will get you all to visit if you want to tomorrow when you get to school. Now go home I’m sure your families are worried and miss you by now.”

…

The cabin of the Kawasaki C-2 military transport smelled intensely of pressurized hydraulic fluid, kerosene, and the dull, synthetic tang of military-grade oxygen masks. It was a brutal, industrial noise inside a continuous, low-frequency roar that vibrated through the webbed canvas jump seats where Nagisa, Sugino, and Rio sat huddled together under oversized olive-drab blankets though their shivering came more from fear than from the freezing cold wind.

Across from them, Karasuma was still on his encrypted satellite handset, his voice a low hum beneath the engine thrum. Next to him, Professor Bitch was uncharacteristically silent, her un manicured fingers tightly knotted around a tactical webbing strap.

And in the dark, unpressurized rear of the cargo bay, hidden behind a towering stack of metal medical crates, a massive, spherical shadow shifted. Koro-sensei had spent the flight zipped into an extra-large, matte-black ballistic gear bag to avoid the eyes of the Yokota aircrew, but the rhythmic, anxious *thwap-thwap-thwap* of his tentacles against the canvas betrayed his state of mind.

"We're descending into Asahikawa Air Base," Karasuma announced, pulling the headset down over his collar. His hair was completely windswept, his jaw covered in a thick shadow of stubble. He looked at the three junior high students. "A Ministry vehicle will meet us on the tarmac. The local hospital has cordoned off the entire fourth floor under a contagious disease protocol. That's the cover story for the public. For us, it means armed guards at every fire exit."

"Karasuma-sensei," Sugino said, his voice trembling slightly as he clutched a standard-issue thermos of sweet green tea. "The amnesia... the doctors said he was talking about tactical coordinates. Is he... does he look like himself?"

Karasuma looked out the small, scratched porthole at the gray, jagged horizon of Hokkaido. "Physically, he’s stabilized. They used an endovascular warming sleeve to bring his core temperature back from thirty-one degrees. But mentally... the brain does strange things when it is pushed past the point of biological survival. Expect him to be disoriented."

…

The Asahikawa Municipal Hospital did not feel like a place of healing; it felt like a command post under siege.

When the blacked-out Ministry van pulled into the ambulance bay, four men in heavy grey tactical vests with unbadged automatic rifles took positions around the doors. The three students were hurried through a concrete service elevator directly to the intensive care isolation unit.

The air on the fourth floor was heavy with the sterile, chemical bite of isopropyl alcohol and the soft, mechanical *hiss-click, hiss-click* of positive-pressure ventilation systems.

"Through here," a female doctor in a full-body protective gown whispered, swiping a security card across a heavy steel door. "He has been awake for twenty minutes. We’ve stopped the sedative drip because his heart rate was dropping too low. He is alert, but... keep your voices low. His auditory nerves are highly sensitive right now."

Nagisa took a breath, his hand instantly finding the small sleeve of his civilian jacket where his fingers instinctively looked for the grip of a training knife. He felt Sugino press against his shoulder, and Rio’s breathing was sharp and shallow behind him.

They stepped into the room.

The room was vast, white, and brightly lit by harsh fluorescent panels. In the center lay Karma Akabane.

He looked incredibly small beneath the heavy, white thermal layers and the silver-trimmed warming blankets. His bright red hair was clean now, but it was dry, stripped of its natural oils, and his face was a patchwork of small, white sterile strips where the slate rock had torn his skin. His hands usually so loose, precise, and expressive were heavily bandaged in thick white gauze up to the wrists, resting on top of the sheets like two broken casts.

But it was his eyes that stopped Nagisa in his tracks.

The copper irises were wide, dilated, and moving with a frantic, animal speed. They scanned the ceiling tiles, the IV poles, the heart monitor, and then. Finally. They focused straight onto the doorway.

"Nagisa," Karma said.

The voice didn't sound like Karma. It was thin, parched, and flat, lacking that low, teasing cadence that usually made every word feel like an inside joke. It was the voice of someone reading from a ledger.

"Karma," Nagisa breathed, taking three quick steps toward the rail of the bed before Karasuma’s hand firmly checked his shoulder, keeping him at a safe distance. "Karma, we’re here. It’s us."

"Sugino. Nakamura. Karasuma-sensei. Bitch-sensei," Karma muttered, his eyes clicking from one face to the next with mechanical accuracy. He knew exactly who they were. The amnesia hadn't wiped away the E-Class roster. "And... the yellow one. He’s outside the window on the ledge. He’s using his suction pads to stay below the line of the security camera."

A faint, muffled *“Nyurufufu…”* vibrated through the double-paned glass of the fourth-floor window, followed by the yellow silhouette of a large, round face pressing against the dark glass from the exterior ledge.

"He's here too, Karma," Nagisa smiled weakly, the tears finally burning the corners of his eyes. "We all came. We’ve been looking for you for twenty-one days. I we- I…" Nagisa cant bring himself to physically say how deeply harmful and terrifying the past 3 weeks had been he cant bring himself to tell karma this.

"Twenty-one days," Karma repeated. He didn't look happy. He didn't look relieved. His brow furrowed, a deep, painful crease forming between his eyes that made him look ten years older. "That’s wrong. I was climbing the ridge behind the old building. The rain started. I remember the smell of the pine needles. You uh Nagisa… we you were late… so was I…I mostly I remember the mud under my boot the bucket was there."

"And then?" Rio asked softly, leaning over the bed rail, her voice completely stripped of its usual sarcasm. "What happened after the mud, Karma?"

"Nothing," Karma whispered. His eyes widened, a sudden, cold flash of panic breaking through his flat expression. "There is no 'after.' The mud was there, and then the river guide was pulling me out of the Teshio. There are no hours between them. There are no miles."

Karasuma stepped forward, his military notebook open, his voice calm but firm. "Karma, think carefully. The Teshio River is in northern Hokkaido. You were found over a thousand kilometers away from the Nagano grid. Did you board a vehicle? Did someone take you? Did you see anyone on the mountain?"

"No," Karma hissed, his teeth chattering suddenly, a dry, rhythmic sound that filled the sterile room. "I told you. There wasn't any time. I didn't walk. I didn't ride. I was just... *there*. The trees changed. The trees in Nagano are oak and larch. The trees on the river were spruce. Why were they spruce, Nagisa? Who changed the trees?"

Nagisa’s skin crawled.

"It’s okay, Karma," Nagisa said, his voice dropping into that quiet, grounding register he used when he needed to calm a high-stress situation. He reached out and gently laid his palm over the thick gauze of Karma's wrapped hand. "The trees don't matter right now. You're in Asahikawa. You're safe."

"My knife," Karma said suddenly, his head twisting on the pillow as he stared at the small metal bedside table. "The green one. The anti-... anti… anti yellow thing material. The guide had it. Where is it?"

"We have it, brat," Irina said, her voice unusually soft lacking its cruel snarky tinge as she stepped forward, reaching down to adjust the heavy thermal blanket around his shoulders. "Karasuma has it locked in the transport case. Nobody is taking your gear."

Karma looked at her, his expression slightly softening, but the vacancy in his eyes remained. He looked down at his bandaged hands, then back at Nagisa.

"I don't have my notes," Karma whispered, his voice dropping into a small, childlike tone that none of them had ever heard from the class's most confident delinquent. "The midterm is next week. If I don't show up... Asano will..."

"Don't worry about the midterms," Sugino choked out, wiping his nose with the back of his sleeve. "We’ll study together. We’ll carry you up the mountain if we have to. Just... just stop looking at the ceiling like that, man. You're giving me the creeps."

Karma didn't answer. His eyes had drifted back to the dark window, where Koro-sensei’s massive yellow face was pressed against the glass, his large eyes turning a soft, empathetic shade of light pink as he watched his student from the cold northern air.

"The water didn't ripple," Karma muttered, his eyelids growing heavy as the residual hypothermic fatigue began to reclaim his nervous system. "When I was sitting on the stone... the white water was loud, but the deep pool beneath me... it didn't move at all. It was like glass, Nagisa. Like someone forgot to turn the current on."

“Its late karma and you had a long day why dont we let you get some sleep we will stay here with you, you just need to sleep ok?2 Karasuma says softly slightly unevered by just how out of it karma truly is right now. He reaches over turning the main light off and trying to ignore how karma’s hands immediately sprung towards Nagisa’s griping hard.

The other kids in the room nod in agreement crowding round Karma's bed each of them trying to soothe him.

"Sleep, Karma," Nagisa whispered, his hand remaining on the gauze until the red-haired boy's breathing turned deep, slow, and heavy. “You can tell us tomorrow what happened.”