Chapter Text
It was a late evening, the air crisp with the bite of approaching winter, the kind of chill that made blood thrumming in veins a little sharper, a little louder. The streets of Yokohama lay cloaked in fog, curling around the cobblestones and alleyways like a living thing, perfect for creatures of the night to slip unseen between the shadows.
But tonight, the predators of darkness had cause to fear. Deep in the city wandered a figure whose reputation preceded him, one that turned whispers into panic and myths into truth.
He was Osamu Dazai, a top vampire hunter of the Armed Silver Seal Agency, an organization sworn to cleanse the world of the undead with precision and ruthless efficiency.
Dazai was charismatic and mischievous, the sort of man whose smile could disarm both allies and enemies alike. His coworker, Kunikida, often bore the brunt of his pranks, his meticulously organized lists and plans undone by Dazai’s playful improvisation.
But behind the charm and casual demeanor lay a predator of unparalleled skill. Vampires who had heard his name trembled, some fleeing at the mere hint of his presence, others daring to challenge him only to vanish without a trace. Tonight, however, Dazai’s confidence was not for mischief. He was on a mission.
As he walked through the narrow alleyways, the orange glow of street lamps flickering against the mist, Dazai adjusted his long trench coat. Beneath it, hidden within layers of fabric and straps, were his arsenal: silver knives and bullets, stakes of polished ash, and gloves tipped with claws capable of slicing through the hardest vampire hide.
To any casual passerby, he might have seemed a man wandering aimlessly through the fog, lost in thought. To a vampire, however, he radiated lethal intent, an aura sharpened by years of survival, cunning, and death dealt without hesitation.
Dazai’s mind wandered briefly to the memories that had cemented his reputation. There had been the incident in Osaka, where he had cornered a Bloodlord that had terrorized a small village for months. The vampire had believed itself untouchable until Dazai, with nothing but a smile and a silver-coated dagger, had dismantled it piece by piece, leaving nothing but a puddle of ash and the memory of fear.
Then came the Yokohama docks affair, where a coven of Shadows had attempted to seize control of the waterfront. One by one, they fell to Dazai’s strategies and tricks, each encounter leaving survivors shaken, if there were any survivors at all. To him, the victories were never about glory—they were a game. And he played to win, every time.
Tonight’s target, however, promised a far more intriguing challenge. Chuuya Nakahara, a Grade 1 Shadow—a vampire of formidable strength and cunning, second only to the elusive Bloodlords in power. Tasked by Fukuzawa himself, Dazai had been instructed to capture or eliminate Chuuya before the vampire could spread influence or draw unnecessary attention from humans. The agency believed Chuuya dangerous, unpredictable, and utterly ruthless. Dazai, for his part, simply smiled at the thought of hunting a worthy adversary.
“The perfect evening for a little dance,” he murmured to himself, letting his gloved fingers brush along the hilt of a silver dagger.
He followed the trail through the fog-shrouded streets: muddy footprints leading out of an abandoned warehouse, whispers of movement in the shadows too fast to be human yet too deliberate to be an animal, and the unmistakable tang of blood in the air. Hours passed in silent pursuit, every sense alert, until he came across a small, weathered barn at the edge of the city outskirts. Dazai paused at the doorway. His eyes widened—not at the sight of prey—but at what the vampire was doing. Chuuya wasn’t drinking from a human; he crouched over a cow carcass, tearing into its heart with methodical precision. The raw, crimson meat gleamed under the weak moonlight. This was unusual. Vampires rarely fed on animals, and even more rarely did they consume hearts instead of simple blood. Intrigue prickled along Dazai’s spine. He stepped forward deliberately, making his approach audible. The soft scrape of boots against dirt caught Chuuya’s attention immediately. The vampire’s head snapped up, ears twitching, eyes blazing red as fangs bared in instinctive defense.
“Whoa-Ho-ho-Ho! Easy there,” Dazai said, raising his hands in a placating gesture. “I’m not gonna hurt you… unless you are a major threat~.”
The red in Chuuya’s eyes receded, shrinking back to the rims of his irises. He still tensed, posture defensive. “…Who are you? Get out of here before I decide to ditch this cow and go after you,” he warned, voice low and wary.
Dazai smirked, tilting his head. “You’re quite brave, threatening me like that, Chuuya~.”
The vampire froze. “…How do you know my name?”
“Hahahah! Oh, the vampire doesn’t even know his own reputation? That’s priceless. Anyways, I’m Osamu Dazai. One of the best vampire-hunters in Yokohama. Now, mind telling me why you’re eating a cow’s heart? Vampires don’t normally do that, y’know.”
Chuuya’s expression hardened. “Why do you want to know?”
Dazai shrugged, casually leaning against the barn post. “Curiosity. I’m a curious little guy. Besides… you’re not like other vampires, are you? That makes me all the more interested.”
Chuuya narrowed his eyes, irritation flickering across his face. “I’m not telling you. How can I trust you when you’re a vampire-hunter? A vampire’s number one enemy.”
Dazai’s eyes sparkled with mischievous agreement. “Fair point. But I’m not like other hunters, just like I noticed you’re not like other vampires. Seems we’re quite similar already~…”
“Don’t you dare compare me to you. You don’t know anything about me…” Chuuya muttered, his voice low, and in a blink, he transformed into a bat and shot toward the barn’s rafters, then out into the night.
Dazai let out a soft whistle, watching the small form disappear into the darkness. A grin spread across his face, sharper than the stakes at his belt. “Interesting. Very interesting.” He murmured under his breath.
He crouched, inspecting the remains of the cow and the faint blood trail left behind. A plan was already forming in his mind. He wouldn’t strike tonight—not yet. Chuuya was a puzzle, and puzzles were fun. Watching him from a distance, learning his habits, waiting for the perfect moment—that was far more entertaining than a simple kill. And Dazai knew, with an almost preternatural certainty, that this vampire wasn’t going to remain a typical target for long. Something about Chuuya—the way he ate, the way he hesitated, the subtle restraint he carried—made Dazai’s curiosity flare.
The streets of Yokohama had grown quieter since the previous night, the usual hum of commerce and human chatter replaced by a heavy, expectant silence. Dazai moved through them as if the city itself were alive—a playground for hunters and hunted alike. The mist clung to the edges of alleys, curling around lampposts and crates like a living curtain, perfect for hiding in plain sight. Dazai’s trench coat flared slightly as he stepped over puddles, his eyes scanning the shadows with a predator’s focus—not to strike, but to watch.
Chuuya Nakahara.
The name repeated in his mind like a melody he couldn’t shake. That red-eyed gaze, the subtle restraint in his feeding, the heart—not blood—he had torn from that cow. Most vampires would have drained it instantly, mindless in their hunger. Not Chuuya. There was method to his madness, and that method intrigued Dazai far more than it should.
Perched atop a low rooftop near the outskirts of the city, overlooking a small park that bordered the countryside, Dazai’s eyes caught movement before his ears did: a small, bat-like figure flitting from one shadow to the next. Chuuya.
The vampire landed with fluid grace behind a barn, unseen by human eyes but clearly visible to Dazai. From this vantage point, Dazai could observe him without being noticed—a perfect setup. He had no intention of confronting Chuuya tonight. No, tonight was for learning, and Dazai had always enjoyed gathering information more than rushing headlong into a fight.
Chuuya’s routine was peculiar. He stalked a small herd of cows, circling silently, before selecting one and pinning it with a surprising burst of strength. Then, with careful precision, he extracted the heart, tearing at sinew and muscle with practiced skill. No chaos, no mindless feeding—just controlled consumption. Dazai’s brow arched in quiet admiration.
“Hmm…” he murmured. “So the famous Shadow vampire is a gourmet, then. Very… cultured.”
He made no move to intervene, instead observing quietly as Chuuya finished his meal and wiped the remnants from his lips. The vampire’s ears twitched, scanning for threats, his eyes flicking briefly toward the treeline where humans might pass. Even now, he was cautious, disciplined.
Hours stretched on as Dazai shifted along rooftops and fences to maintain the perfect vantage point. He noted every motion: the slight flex of Chuuya’s claws, the way he balanced on narrow beams, the flicker of crimson when sensing movement. Chuuya’s habits were consistent—methodical—but small variations suggested adaptability, intelligence, and perhaps… curiosity.
Around midnight, Chuuya paused, glancing at the barn door as if hearing a sound that Dazai could not. The vampire crouched, tension coiled like a spring, then relaxed as nothing emerged. Dazai allowed himself a quiet chuckle. Smart, cautious, aware… excellent traits. And yet predictable enough.
Over the next few days, Dazai became a ghost in the city, meticulously following Chuuya’s nightly movements. He catalogued feeding patterns, escape routes, favored hiding spots—anything that might reveal a vulnerability or, more importantly, the mind behind the monster. Every night he returned home at dawn, trench coat streaked with mist and faint traces of animal blood from rooftops, porches, and barns.
One morning at the Agency, Ranpo found him leaning against a wall, eyes half-closed, still reviewing mental notes of Chuuya’s routines. “Hey, Dazai,” Ranpo said, yawning so widely it looked painful, “when will you get back to going on missions? I’m so tiirreddd!”
Dazai’s expression softened slightly, a tiny flicker of guilt passing over his otherwise mischievous face. “I am on a mission, Ranpo. Just… haven’t caught the vampire yet.”
Ranpo groaned. “Well, hurry up then! I need my sleep!”
Dazai’s usual smirk didn’t appear. He hadn’t realized how much time had passed and how it had affected his coworkers. A brief pang of responsibility tugged at him before he shoved it aside; Chuuya wasn’t just another target. He was… different.
By the next day, Fukuzawa noticed that Chuuya had not yet been “dealt with.” The veteran hunter frowned and reassigned Dazai to other missions. Officially, he was no longer on Mission: Chuuya, but that did nothing to curb his curiosity. In fact, Dazai found it exhilarating to operate outside the constraints of the agency’s expectations. Now he could observe Chuuya at his leisure, completely unnoticed.
It was on one of these nights that Dazai followed Chuuya to a destination entirely new. The vampire moved swiftly, silently, toward a colossal structure that rose impossibly into the sky. Its silhouette dominated the horizon, an abandoned tower that seemed as tall as modern skyscrapers. The building was ancient but imposing, its presence alone commanding attention.
Inside, the interior was more astonishing than Dazai could have imagined. Towering pillars, intricately carved, stretched to the ceiling, and blue-stained glass bathed every surface in an eerie, ethereal glow. Every corner seemed carefully designed, yet abandoned—a cathedral of forgotten grandeur. A long hall led to a room the size of a small ballroom. There, a massive table stretched nearly the entire length of the room, surrounded by empty chairs, all lined with dust and shadows.
Dazai crouched behind a corner, breath barely audible, observing Chuuya kneeling before someone seated at the far end of the table. The figure was massive in presence, radiating power that made Dazai’s pulse quicken. His eyes narrowed behind the shadows.
Bram Stoker.
The progenitor of all vampires. The first of his kind. The vampire legends whispered across centuries, whose very name could bend the will of lesser monsters. Dazai felt a shiver run down his spine—not fear, but the kind of exhilaration that came from knowing he had stumbled onto the heart of darkness itself. He felt only a tiny bit of nervousness.
Chuuya lowered his head in respect or perhaps fear—Dazai couldn’t yet tell—but the dynamics of the room were clear: the Shadow kneeling before the Lord of Vampires, aware that he was more than just a subordinate. And Dazai, hidden in the shadows, knew that this night was only the beginning of something far greater than a simple hunt.