The golden light of the setting sun had already bled into the deep oranges and pinks of twilight, painting the narrow Taisho-era streets in a soft, almost romantic glow. The kind of light that made even the wooden buildings and paper lanterns look like something out of a painting. Shuya walked side by side with Mitsuri Kanroji, the faint scent of sakura mochi and her own gentle perfume mixing in the cool evening air. Her black hair—still undyed, untouched by the mountain of mochi she would one day consume—swayed gently with each step, catching the last rays of sunlight like threads of silk.
Mitsuri kept stealing glances at him, her pale-green eyes sparkling with a mix of shyness and pure, unfiltered joy. Her cheeks were still flushed from the eighteen plates they had demolished together at the restaurant. Every few seconds she would fidget with the hem of her kimono sleeve, as if she couldn't quite believe the afternoon had been real.
"Shuya-san… today was really, really fun," she said softly, voice barely above a whisper. "I-I've never had a blind date like this before. Usually people… um… leave after the first course when they see how much I eat. But you… you kept ordering more! And you even said my appetite was cute…"
She trailed off, covering her face with both hands as if the memory alone might make her combust on the spot.
Shuya chuckled, the sound low and warm. "I meant it. Watching you enjoy food like that… it's honest. Real. In a world full of people pretending to be something they're not, that kind of genuine happiness is rare." He kept his tone light, but his mind was already elsewhere—scanning the streets with a thin layer of En he had quietly expanded the moment they left the restaurant. The city felt too quiet. Too still. The usual evening bustle of vendors, children, and workers heading home had vanished like smoke.
Mitsuri peeked at him through her fingers, her expression softening into something almost reverent. "You're really kind, Shuya-san. And strong. I could tell from the way you walk… like you've fought before. But you don't look like a soldier or anything. Are you… maybe a swordsman? Or a traveler from far away?"
Before Shuya could answer, the silence shattered.
A low, guttural growl echoed from the alley to their left. Then another. And another. The air grew thick with the metallic tang of blood and something rotten—something that didn't belong in a living world.
Mitsuri froze mid-step, her body instinctively tensing. Even without formal training yet, her monstrous strength and sharp instincts kicked in. "Shuya-san… that smell… it's not normal. It's like… like death."
Shuya's smile didn't falter. "Stay behind me, Mitsuri-san. Looks like our date just got extended."
From the shadows stepped three figures—tall, pale, with crimson eyes glowing like fresh blood under the lantern light. Their skin was unnaturally smooth, almost porcelain, and their mouths stretched into unnatural grins filled with razor fangs. Demons. Newly turned, by the look of them. Weak. But still dangerous to any normal human.
The lead demon—a lanky male with messy black hair and torn traditional robes—licked his lips. "Rare blood… and a girl who smells like she could feed ten of us. Jackpot tonight."
The second, a female with long claws and a tattered kimono, giggled. "The boy first. I want to hear him scream before I eat the pretty one."
The third didn't speak. He just charged.
Shuya moved before the demon even finished its lunge.
He didn't draw a weapon. He didn't need to. With a casual flick of his wrist, aura condensed in his palm—Transmutation flames flickering to life in deep crimson, the same technique he had honed with Yuriko's help back in the zombie world. The fire wasn't hot in the normal sense; it carried the concentrated zombie toxin properties he had been experimenting with, now layered with his own Nen. A single spark would be enough.
"Emission: Open Heaven Arrow."
A thin bolt of pure aura shot from his fingertip like a railgun round. It pierced the charging demon's shoulder before the creature could even register the movement. The demon flew backward, slamming into a wooden wall hard enough to crack the beams. Black blood sprayed across the alley, but the wound didn't close instantly—the toxin in the arrow was already working, slowing regeneration.
The other two demons hissed in shock.
"What the—?! Human?! That power—!"
Mitsuri's eyes widened to dinner-plate size. "Shuya-san?! You… you just… with your finger?!"
Shuya didn't look back. "Eyes on them, Mitsuri-san. These aren't normal thugs. They're the things that go bump in the night. Man-eating demons."
He stepped forward, aura flaring in a controlled Ren that made the air around him shimmer. The two remaining demons split up—one going high, leaping across rooftops with impossible agility, the other circling low like a predator.
The high one struck first, claws extended, aiming for Shuya's throat. Shuya simply raised his hand and conjured a single silver chain—Conjuration pulled straight from Saeko's synced talent. The chain shot out like a living serpent, wrapping the demon's entire body mid-air and yanking it down. It crashed into the street with bone-shattering force.
"Manipulation: Binding Vow – No Escape."
The chain tightened, glowing with purple runes identical to Reizan's design. The demon screamed as its aura—its life energy—was forcibly suppressed, regeneration grinding to a halt.
The low demon lunged at Mitsuri instead, thinking her the easier target.
Big mistake.
Mitsuri's body moved on pure instinct. She grabbed a nearby wooden signpost—easily two hundred pounds—and swung it like a baseball bat. The post connected with the demon's face with a sickening crunch, sending it tumbling across the street.
"Eek—! I'm sorry! But you were going to eat us!" she yelped, still holding the bent signpost like it was a toy.
Shuya laughed despite himself. "Nice swing, Mitsuri-san. You're a lot stronger than you look."
The demon rolled to its feet, face caved in but already healing. "You… you brat! I'll tear you apart—"
Shuya snapped his fingers. Emission again—this time a wide-area burst of Transmutation flames mixed with the zombie toxin. The flames didn't burn flesh; they infected it. The demon's skin began to blacken and rot from the inside, its regeneration fighting a losing battle against the virus-like Nen construct.
In under ten seconds, all three demons were on the ground, bound, burned, and leaking black blood that sizzled on contact with the air.
Shuya crouched beside the lead demon, conjuring a small glass vial. "Blood Demon Art… let's see if you have one."
The demon spat blood. "You… you're not human! What are you?!"
"Someone who's very interested in your boss's blood," Shuya replied calmly. He pressed two fingers to the demon's forehead and forced a tiny amount of his own aura in—testing the needle technique he had used earlier on the other demon back in the streets. The creature convulsed, eyes rolling back as the Undead Prelude ability took hold.
Mitsuri watched the entire thing with her mouth open, signpost still clutched in her hands. "Shuya-san… you're… you're like a hero from the old stories. The ones about the Demon Slayer Corps! But… but you're not wearing a uniform. And your power… it's not a Breathing Style. I've never seen anything like it!"
Shuya stood up, dusting off his hands. The three demons were now completely still, eyes blank white—under his control for the moment. He turned to Mitsuri with a gentle smile, the same warm one he had given her across eighteen plates of food.
"It's not a Breathing Style, no. It's something I call Nen. A way to control life energy itself. I'll explain more later if you want… but right now, we should get you home safe. Those things won't bother anyone again tonight."
Mitsuri's face lit up like the sunrise. "You'll explain?! Really?! And… and you still want to see me tomorrow? Even after all this?!"
Shuya ruffled her hair lightly—careful not to mess it up too much. "Of course. I promised another date, didn't I? Besides… I think you'd fit right in with the kind of life I'm building."
He didn't elaborate. Not yet. But in his mind, he was already picturing it: Mitsuri in the harem, her endless appetite and ridiculous strength paired with a future contract scroll. Love Hashira energy plus Nen? She would be unstoppable. And adorable. The perfect balance to Saeko's bloodlust, Shizuka's laziness, Rei's tsundere fire, Saya's genius, Yuriko's cunning, and Rika's wildness.
Mitsuri blushed so hard her ears turned red. "O-okay! I'll wait for you tomorrow then! Same place? Or… or wherever you want!"
She waved frantically as she hurried toward her family home, glancing back every few steps like she was afraid he might vanish. Shuya waited until she was safely inside before letting his expression cool.
He turned back to the three controlled demons.
"Report. Any knowledge of the Kamado family? Or a swordsman named Kokushibo?"
The lead demon answered in a flat, robotic voice. "No… but Lord Muzan has been searching for something in the mountains lately. A flower. And a family that might know it."
Shuya's eyes narrowed. Perfect. The pieces were falling into place faster than expected.
He opened the Crossing Gate right there in the alley—glowing outline shimmering into existence. Before stepping through, he gave the controlled demons one last order: "Stay hidden. Hunt only other demons. Feed me information on Muzan's movements."
Then he walked through.
The gate closed behind him, leaving only the faint scent of ozone and the three motionless demons in the alley.
Back in Greed Island, the castle's grand dining hall was already filled with the warm aroma of dinner. Six pairs of eyes turned toward the gate the moment it appeared.
Saeko was the first to stand, purple hair cascading over her shoulders, Reizan resting against the wall like a loyal guard. "Shuya-kouhai. Welcome back."
Shizuka waved lazily from the couch, Snowball Beasts bouncing on her lap. "Little Shuya~ Did you bring souvenirs? Or maybe a new wife?"
Rei's ahoge twitched as she set down her spear. "Yan-kun! You're safe, right? Those demons you mentioned earlier…?"
Saya crossed her arms, trying (and failing) to look indifferent. "Hmph. Took you long enough. We almost started without you."
Yuriko smiled knowingly, purple eyes gleaming. "Little brother… that look on your face says the date went well. And the streets weren't quiet for long, were they?"
Rika smirked, leaning back in her chair with a gun casually balanced on her knee. "Spill it, you little bastard. Did you conquer another one already? Or did you just blow up half the city testing your new toy?"
Shuya stepped fully into the hall, the gate dissolving behind him. He let out a long breath, then grinned—the same easy, confident smile that had won over every single one of them.
"Date went great. Mitsuri's even cuter in person. And yeah… ran into some demons. Three of them. Tested the zombie-toxin Transmutation layer on live targets. Worked better than expected. Got some intel on Muzan too."
He walked straight to the table, pulled out his chair, and sat down like he had never left.
"Saeko-senpai, Rei, Saya—dinner looks amazing. Shizuka-nee, those Snowball Beasts are getting chubby again; you feeding them too much aura?"
The girls all relaxed instantly, the earlier tension melting into the familiar, comfortable chaos of their little family.
Saeko moved behind him and began massaging his shoulders without being asked. "Tell us everything while you eat, Shuya-kouhai. We want details."
Rei leaned in, eyes sparkling. "Did the girl… Mitsuri… see you fight? Was she scared?"
Saya puffed her cheeks. "Don't get the wrong idea, but… if she's strong like you said, maybe she could help with the next world run."
Yuriko poured him a cup of tea, her voice teasing. "Big sister is curious too. Did you already plant the seed for a future contract?"
Rika laughed. "If you did, I call dibs on sparring her first. Sounds like she hits hard."
Shizuka just hugged one of the Snowball Beasts tighter. "As long as you're back for dessert, Little Shuya. We have red bean rice again~"
Shuya took a bite of the perfectly cooked meal—Rei and Saya's prep work shining through—and began recounting the entire evening in vivid detail. The blind date. The eighteen plates. Mitsuri's adorable reactions. The sudden demon ambush. The way he had combined Emission, Conjuration, Transmutation, and Manipulation in under a minute to neutralize all three threats without breaking a sweat. The controlled demons now serving as his eyes and ears in the Taisho world.
He left nothing out—except the exact moment he had imagined Mitsuri joining their harem. That part he kept to himself for now. Timing was everything.
As he spoke, the girls listened with rapt attention, occasionally interjecting with questions or teasing comments. Saeko's eyes lit up at the mention of the sword-like chain technique. Rei's ahoge stood straight up when he described Mitsuri swinging the signpost. Saya muttered something about "another easy-to-read girl" under her breath. Yuriko's smile grew sharper with every strategic detail. Rika wanted to know if the demons had guns. Shizuka just kept humming happily and feeding him bites from her own bowl.
The conversation flowed naturally into the night—planning the next trip through the gate, discussing how to approach the Kamado family without scaring Tanjiro too badly, and debating whether Mitsuri should get a contract seed on the next date or if they should wait until she joined the Demon Slayer Corps.
Shuya leaned back in his chair, surrounded by the six women who had become his entire world, and felt that same deep wave of gratitude he had felt the night they first arrived in Greed Island.
This was it.
This was the life he had transmigrated for.
Zombies in one world, demons in another, and an ever-growing harem of impossibly strong, impossibly loyal women who accepted every part of him—including the ones that involved crossing dimensions and collecting ancient sword styles like trading cards.
Tomorrow he would go back.
Tomorrow he would meet Mitsuri again.
Tomorrow the Kamado family's night of terror would truly begin.
But tonight?
Tonight was for family.
For dinner.
For the quiet moments between apocalypses.
And for the promise of even more power, more wives, and more worlds waiting on the other side of the gate.
Shuya raised his cup. "To new dates, new demons, and new contracts."
The girls all raised theirs in unison, voices overlapping in a chorus of affection and excitement.
"To Shuya-kouhai."
"To Yan-kun."
"To big brother."
"To little brother."
"To you little bastard."
"To Little Shuya~"
The sound of clinking cups echoed through the castle hall, followed by laughter, teasing, and the soft bounce of two very happy Snowball Beasts.
Outside the castle walls, the endless map of Greed Island stretched on forever.
Inside, Shuya's little paradise was only getting bigger.
And somewhere in the Taisho-era night, three controlled demons waited silently for their new master's next command.