Work Text:
Rumi moved like a shadow through the penthouse.
The soft thump of Zoey’s music leaked under her bedroom door—something fast and bass-heavy. Mira’s voice echoed faintly from the kitchen, mumbling lyrics as she ran scales between bites of tteokbokki. The girls were distracted, busy, tangled in their own routines.
Perfect.
Her heart pounded like it wanted to give her away. She crept down the hallway barefoot, hoodie zipped up, her black mask tucked under her chin and her bucket hat already pulled low. In one hand, she clutched her phone so tightly the screen flickered.
Jinu
meet me at the aquarium. 7pm.
She didn’t reply. She hadn’t needed to. He knew she’d come.
Rumi slipped her shoes on by the front door in near silence, only wincing when the lock clicked a little too loud. She froze. Mira’s humming didn’t stop. Zoey didn’t come stomping out with a wooden sword and a death glare.
Safe.
The door eased shut behind her like it was in on the secret. And just like that, she was outside—free.
⸻
The streets were still humming from rush hour, but her hoodie and hat shielded her like armor. She kept her head down, dodging glances and streetlights, her braid swaying like a metronome behind her.
Every step toward the COEX Aquarium felt stupid and thrilling and dangerous and so stupid again. What was she doing? Sneaking off to meet a demon boy like this was a drama plot, not her actual life.
But then she saw him.
Leaning against the aquarium sign, hoodie hood up, arms crossed. One foot tapped lazily on the pavement. His red beanie sat low on his head and a silver earring winked in the blue light above him. Even from across the street, even in the dark—
He was smiling.
That soft, crooked, Jinu smile that made her forget every rule she’d ever been given.
She pulled her mask on tighter and approached with her heart in her throat.
“Really?” she hissed, elbowing him when she reached his side. “You’re just standing there like you’re not on every K-pop gossip page.”
Jinu glanced down at her, eyes crinkling with amusement. “And you came anyway.”
Rumi rolled her eyes. “Unfortunately.”
“Admit it,” he said, his voice warm under the mask. “You missed me.”
She looked away, cheeks burning even though no one could see them. “Let’s just go inside.”
But he caught her wrist before she could step past him, fingers curling gently—not to stop her, just to feel her. Her pulse jumped under his touch.
“I missed you,” he said, quieter.
Rumi didn’t answer. She didn’t have to.
⸻
Inside, the aquarium was nearly empty. The soft hum of filtration systems buzzed beneath glowing tanks of blues and violets. Bioluminescent jellyfish drifted like ghosts, casting shimmering shadows on the walls. Even her own reflection looked like it was underwater.
The front desk girl barely glanced at them—two idols in oversized fits, clearly on a secret date but pretending they weren’t. She waved them through with a knowing smirk.
The moment they stepped into the first exhibit tunnel, Rumi let out a breath she hadn’t realized she’d been holding.
Jinu walked beside her, close but not touching. His arm brushed hers every few steps, intentional and not. Her body ached to lean into it.
“You’re quieter than usual,” he teased softly, hands in his hoodie pockets.
“I’m processing my regret.”
He laughed under his breath. “Ouch.”
Rumi shot him a look, but it dissolved when she saw the tank beside them. A massive sea turtle drifted past the glass, slow and wise like something out of a fairytale.
Jinu tilted his head toward it. “바다거북이,” he said. “Sea turtle.”
She arched a brow. “What, now you’re a marine biologist?”
“Please. I’m just here for the vibes.” He leaned in, lowering his voice dramatically. “Kinda slow. Kinda chill. Just like me.”
Rumi snorted. “You are neither slow nor chill.”
“That’s slander.”
“That’s facts.”
They kept walking, step by step into the glowing quiet, two silhouettes under the dream of water and glass. Every once in a while, Jinu would point at a fish or a weird coral and throw out a ridiculous name. Rumi would correct him. He’d act wounded. She’d smirk.
It was easy.
It was too easy.
And that made it terrifying.
⸻
She caught him staring when they passed the jellyfish room.
The light from the tank bathed her face in violet and gold, casting her features in soft glow. She turned her head to ask him something stupid—probably about the weirdly shaped jellyfish—and found his eyes already on her.
He didn’t look away.
“What?” she asked, heart skipping.
Jinu’s voice was softer now. “Nothing. Just…”
He looked up at the jellyfish. “You glow better than these guys.”
Rumi flushed, lips twitching. “That was smooth.”
“I know.”
She bumped his shoulder. He bumped her back. Her braid swung between them.
They kept walking.
They wandered without a real plan, weaving between empty halls and glowing tanks, like kids skipping class in the prettiest crime ever committed.
The only sound was the low hum of the filters and their footsteps echoing off the floors. The tanks glowed softly in waves—deep blues, seafoam green, glowing purples that painted Jinu’s cheekbones in something not quite real.
They stopped in front of a long tank of spotted garden eels, their heads poking out of the sand like little noodles.
“Same,” Jinu muttered, hands in his hoodie pocket. “That’s how I feel every time a camera pans to me during an interview.”
Rumi snorted. “You wish you were that shy.”
“Correction,” he said, completely straight-faced. “I wish I could hide in a hole and only emerge when snacks are present.”
“Okay, fair.”
They moved on—past a swirling school of anchovy-like fish, past crabs stacked on rocks like cranky businessmen, past a tank labeled “자이언트 그루퍼 (Giant Grouper)” that looked suspiciously like it hated everyone.
Jinu pointed at it dramatically. “That’s Mira.”
Rumi gasped, mock-offended. “She would DESTROY you if she heard that.”
“She already wants to.”
“She always wants to.”
⸻
The jellyfish room came without warning.
It opened up like a dream—floor-to-ceiling tanks, rounded glass domes that stretched over their heads, and thousands of glowing jellyfish drifting slowly like ghosts suspended in stars. The lights were dim, the walls dark, and the only color came from the bioluminescent pulses of soft pink, electric blue, and honey gold.
They both stopped.
“Oh,” Rumi whispered. “Okay… this is kinda insane.”
Jinu didn’t say anything. He just stared at her again—eyes reflecting the light, face unreadable.
“You’re doing that thing again,” she said, not looking at him.
“What thing?”
“Staring like I’m gonna disappear.”
“I’m just admiring the view,” he said softly. “You glow better than the tank, remember?”
She tried not to smile. “That line’s expired.”
He smirked. “I’ve got more.”
She turned to the tank and leaned in, watching the jellyfish drift. “You ever think about how they don’t have hearts?”
“What, jellyfish?”
“Mhm.” She tilted her head. “No heart. No brain. Just vibes.”
“Literally your ideal man.”
She burst out laughing, bumping his arm with her shoulder. “Shut up.”
Jinu grinned like he’d won something important.
They took selfies in front of the glass—a bunch of them.
Rumi used a jellyfish filter that gave her little floating tendrils around her head. Jinu found one that put a sea turtle hat on him and made his cheeks puff out. They laughed quietly, half-whispering as if the jellyfish could hear them.
Somewhere between the filters and the flirty elbow jabs, she realized they’d let their guards down. They weren’t just sneaking around anymore.
They were existing. Together. Honestly.
And that scared her more than anything.
⸻
They reached the touch pool, a low stone circle filled with soft-shelled creatures. Starfish, little urchins, sea cucumbers like squishy alien pickles.
Rumi hovered her hand over the water. “I don’t know…”
“What, you’re scared?”
“They’re alive, Jinu.”
“So are we.” He reached in and touched a pale orange starfish with the gentlest movement she’d ever seen from him.
He looked up at her. “C’mon, Rumi. You fight demons with glowing swords. You can handle SpongeBob.”
“Don’t call it that.”
She reached in—hesitant, careful—and let her fingers graze the starfish’s back. It was firm but soft, weird but fascinating. She blinked.
“Okay. That’s… not horrible.”
“Braver than you look,” he said.
She rolled her eyes. “Don’t push it.”
They stood at the edge of the pool for a moment, quiet.
Her hand was still in the water. His was close to hers, but not touching. Just near enough that she could feel the heat of it.
The room was still and low-lit. Water rippled gently under her fingertips.
Jinu spoke without looking at her.
“Do you ever feel like… we’re just glass decorations in this life? On display? Pretty, but not real?”
Rumi looked over at him, startled by the question.
He kept going. “Like you’re performing your identity instead of living it.”
Her breath caught.
“I feel like I’m half water, half fire,” she said quietly. “And neither side knows what to do with me.”
Their eyes met again. Not teasing now. Just something raw and shared and unspoken for too long.
“Yeah,” Jinu murmured. “That.”
He reached out—this time not teasing—and gently wiped a droplet of water from her cheek. It had landed there from the pool, but it felt like something more.
Neither of them moved for a long moment.
“Come on,” he said finally, voice soft. “There’s one more thing I wanna show you.”
She followed without question.
⸻
The tunnel curved beneath the water like a secret held between the glass and the sea.
Above their heads, sharks glided silently, fins slicing through sapphire light. Stingrays ghosted past like shadows with wings. The tank curved high around them, glowing with bioluminescent purples and deep midnight blues, casting everything in a dreamlike haze.
No one else was there.
Just the hum of life and water.
Just them.
Rumi pulled off her mask. Slowly, carefully.
Her braid slid over her shoulder, catching the light. Her lips—bare and soft—parted just enough as she exhaled.
Jinu watched her. Still. Reverent.
He pulled his own mask down too, revealing the curve of his jaw, the little mole near his cheekbone, the faint line of a scar he never talked about.
They stood in silence.
No more teasing. No more pretending.
Only breath and heartbeat and blue light.
⸻
Jinu reached forward. Not fast. Not dramatic.
Just gently, like he was brushing dust off something sacred.
His fingers touched the end of her braid, tracing it lightly.
“You ever gonna wear your hair down?” he asked, voice low.
Rumi blinked. Her throat tightened.
“Probably not. Why?”
He shrugged, still watching the braid twist under his fingers. “Just curious.”
She hesitated. Then:
“It’s a reminder.”
“My mom used to braid my hair when I was little. Celine—she raised me after my mom died—she kept it going. Told me to always look perfect. No matter what.”
Rumi grabs the end of her braid and twirls it around her finger. “So… I did. Even when I hated it. Even when I was covered in marks and scared I’d never be enough.”
“This braid makes me feel like maybe I’m still holding on to something… pure.”
Jinu’s hand moved—not away, but higher. He cradled the side of her face now, thumb just brushing beneath her eye.
She leaned into it, eyelids fluttering.
Her voice dropped, raw and honest:
“Sometimes I think… if I take it down, I won’t know who I am anymore.”
He was quiet for a second.
Then he whispered:
“You should let your hair down sometimes, Rumi.”
She closed her eyes.
Just for a moment.
Just to feel the way his hand fit her cheek like it belonged there.
The glow from the water painted her in soft shades of violet and ocean green. Her lips parted. Her body swayed a little toward him, almost like she didn’t notice.
She didn’t see the look in his eyes, but she felt it—
that aching, tender, devastating adoration.
Like he was seeing her for the first time.
And already mourning it.
Then—his voice, lower now. Barely a breath.
“As far as I’m concerned… you’re just as beautiful with the cracks showing.”
Then he kissed her.
Softly.
Carefully.
Like he was afraid the moment would break if he pressed too hard.
Their lips touched, and the world stilled.
The only sound was the muted ocean above them, the rumble of something ancient and slow. She melted into him like the warmth she’d never let herself need.
He tasted like spearmint gum and something electric—
a little salt, a little honey, a little like midnight.
Her fingers curled around his hoodie without thinking. His other hand moved and settled on her waist, gentle but grounding, like he was saying you’re real. you’re here. I’m not going anywhere.
Their mouths moved in slow, sweet rhythm.
Not desperate.
Not messy.
Just… longing.
A kiss that said everything they weren’t allowed to say out loud.
Her braid brushed his chest. His nose skimmed hers. She sighed against his lips, and he caught it like it was precious.
They stayed like that, kissing slow and deep under the soft light—letting it last, letting it matter, letting themselves feel it without rushing to the next pain.
When they finally pulled apart, they didn’t move far.
Their foreheads touched. Her eyes still closed. His thumb brushed along her jaw.
Rumi didn’t speak.
Neither did he.
Because they both knew—
This was the moment they’d replay forever.
The aquarium lights had dimmed even more. A soft chime played through the overhead speakers—a polite reminder that it was closing time.
⸻
They stood near the tunnel exit, just out of sight of the staff. The world outside was already creeping in—responsibilities, personas, lies—but in here, under the soft blue glow, they were still just Jinu and Rumi. Not idols. Not weapons. Not enemies.
Just two hearts, caught in a pocket of stolen time.
Rumi reached for her mask but paused halfway.
Jinu was still watching her like he didn’t want this to end. Like maybe, somehow, it wouldn’t have to.
She looked up at him. “If we get caught—”
“We won’t,” he said quickly, like a wish. “We’ll be careful.”
A beat. Her lips twitched. “You are literally the least careful person I know.”
He grinned. “And yet, here we are.”
She laughed once—quiet and real. Then, before she could overthink it, she stepped forward and wrapped her arms around his waist.
He didn’t hesitate. He pulled her in.
And this kiss…
this kiss was hope.
It wasn’t desperate, or sad, or rushed.
It was soft.
Certain.
Like they’d found something real, and finally decided to hold onto it.
Rumi’s fingers curled into the front of his hoodie, pulling him closer. Jinu’s hands cupped her face again, gently brushing his thumbs over her cheeks, tilting her head just right.
Their lips met in a kiss that tasted like mint and starlight. Like beginnings. Like maybe the universe wasn’t so cruel after all.
He smiled against her mouth. She giggled when their noses bumped. And then they kissed again—deeper, slower. Like they had all the time in the world.
When they pulled apart, they stayed close, breathing the same air.
Jinu looked at her like he was memorizing. “We’ll be okay,” he said.
Rumi smiled, quiet but sure. “Yeah. We will.”
Then—masks back on, fingers brushing as they parted, like the story was just starting.
They kissed like it was the start of something new.
Not the end.
Not a goodbye.
They had no idea how close the glass was to shattering.
(CUT TO IDOL AWARDS CONCERT)
The stage was in ruins.
Cables sparked. Spotlights cracked and fizzled. The demon king Gwi-Ma stood towering in the center, a mass of flame and ash, his voice raised—charged with dark magic and pointed straight at Rumi.
Mira and Zoey’s screams echoed from somewhere behind her. “RUMI, MOVE!!”
But she couldn’t.
Her body was frozen. Not from fear—no, Rumi had faced worse. But this… this was something heavier. Gwi-Ma’s power pressed against her chest like a mountain. Her limbs wouldn’t listen.
His flames surged forward, purple-red sparks crackling—
And then—
Jinu appeared.
A blur of black and gold light, he slammed into her from the side, knocking her to the ground. She hit the floor hard—but felt no pain.
The light. The sound. Her name.
“RUMI—”
His voice cut out.
She turned.
Her vision swam.
Jinu was floating—no, burning. His soul peeled outward like petals made of flame and memory, white and gold, his body flickering at the edges like he was being pulled through invisible seams.
His feet weren’t touching the ground.
His eyes were locked on hers.
“I’m sorry,” he mouthed.
The glow from him began to dissolve into shimmering threads, spiraling upward like stardust.
And that’s when she saw it.
The flash of memory.
The softness.
The tunnel.
The aquarium.
The soft lighting washing over them in blues and violets.
The hush of water and jellyfish.
His thumb on her cheek.
“You should let your hair down sometimes.”
“You’re just as beautiful with the cracks showing.”
Her fingers in his hoodie.
His lips against hers.
That one kiss—
slow, sure, hopeful.
Not desperate.
Not a goodbye.
A beginning.
⸻
Her soul cracked.
“NO—NO NO NO—” she screamed, dragging herself forward, reaching toward his face. But his soul was the light that was already slipping through her fingers.
He smiled at her.
A soft, sad, peaceful smile. Like he knew.
Like he’d made peace with it.
And in the final shimmer of his energy, she felt it—
his presence brushing against her chest, one last warmth blooming there—
“I meant every word.”
Then he was gone.
Light. Smoke. Silence.
Rumi collapsed, sobbing. Not because it was the end.
But because for once… she had let herself believe it wasn’t.