Spring air carried a sharp chill across the university courtyard, brushing past clusters of students rushing between classes.
Among them sat a young man with dark skin, black hair, and sharp yellow eyes. He leaned back on a bench, posture loose, thumbs tapping at his phone. The screen flickered with color as a familiar voice rang out: "Rules are meant to be broken!"
[Insert Image of the MC here, on what you think he looks like]
One final attack — victory. The boss dropped, loot secured.
Leo exhaled through his nose. "Man… still using a character that's been power-crept into oblivion. Then again, this form's more fun anyway."
A notification blinked across his screen. He pocketed the phone, adjusted his black jacket and white shirt, and stood. The spring light hit the edges of his hair as he glanced at the clear blue sky.
"This world's peaceful," he thought. "Even with all the politics and chaos, people still wanna trade it for a fictional one… I'll never get that."
A small laugh escaped him. "Then again, if I said that on Twitter or Reddit… they'd crucify me — or at least my avatar."
"Yo! Leo!"
The shout snapped him from his thoughts. Turning, he saw two familiar faces jogging over — Kenji, tall and always in a hurry, and Mika, whose hoodie made her look half-asleep even at noon.
Kenji grinned. "Bro, tell me you actually went to class today."
Leo raised an eyebrow. "Define 'went.'"
Mika snorted. "That's a no."
They started walking toward the campus gate together, the breeze pushing stray cherry petals across the path.
"So what were you playing this time?" Kenji asked.
Leo smirked. "Space RPG. I was bullying a weekly boss with a unit everyone says is obsolete."
Mika yawned. "You and your loyalty projects. Why not just use the meta ones?"
"Because fun exists," Leo said dryly. "Also, I like winning with style instead of spreadsheets."
They laughed. It was an ordinary sound — sunlight, chatter, small jokes that didn't mean much but made life feel human.
At the crosswalk, the light flicked red. Leo stopped, hands in his pockets. For some reason, the world felt too still. The sound of cars dimmed, the air holding its breath.
Kenji turned. "Hey, you good?"
Leo blinked, forcing a smile. "Yeah. Just felt a little lightheaded—"
The word never finished. A rush of static swallowed everything — color, sound, breath. For a heartbeat, he felt like data being deleted.
Then, silence.
A whisper — not a voice but something inside the silence — brushed his mind.
"This world is broken. You'll do better in another."
Before he could react, the ground gave way beneath his feet, and the spring sunlight folded into darkness
Leo looked around as he moved his head. He was confused; he wondered where he was.
This place was pure black. He was confused; his feet were standing on something, but it was clearly not solid ground. Then he heard it; it was a bit panicked and tired.
"Oh shit, I grabbed the wrong soul".
Leo blinked. "...Excuse me?"
The voice muttered again, sounding like a divine being who'd pulled three all-nighters in a row.
"Yeah, yeah—hold on—ugh, I knew I should've labeled the human-world souls better. Damn multiverse bureaucracy…"
Leo squinted into the void. "Are you… God? Or, like, an intern version of Him?"
"Technically an Administrator," the voice said, shuffling through what sounded like papers. "You died, didn't you?"
Leo frowned. "...No?"
A pause. Then: "Wait—no?!"
Leo looked around at the endless blackness. "I was just walking across a street, thinking about how people shouldn't wish for reincarnation. Next thing I know, I'm here."
The voice groaned. "Yeah, that's on me. I might have… pulled the wrong data stream from Earth-Prime."
"Wow. Great quality control you got there."
"Hey, in my defense, do you know how many Leos there are?!" the voice snapped. "Anyway—uh, since you're here already, can't exactly undo it. Multiversal refund policies are hell. So… how do you feel about ninjas?"
Leo blinked. "...Ninjas?"
"Yeah. You're being sent to a world with ninja, demons, and… uh…" The voice coughed awkwardly. "…let's call it very loose clothing policies."
Leo deadpanned. "Oh no. You're not talking about that world, are you?"
Silence. Then the voice said, sheepishly, "...Yeah. That one."
Leo buried his face in his hand. "I swear, if I see purple hair and a demon invasion, I'm deleting you when I figure out how."
"Hey, hey, I'm not sending you empty-handed!" the voice said quickly. "That world's messed up. So—uh—here, Prototype Package! Mix of Mercer and Heller's abilities. Full virus control. You'll thank me later."
"What—wait, Prototype? Like the game?"
"Yup! Biomass absorption, regeneration, shapeshifting, the works. You get that, and I get to close my cosmic error report."
Leo sighed. "So I die because you're bad at paperwork and now I'm a super-virus ninja babysitter. Perfect."
"Glad you understand!"
Light began to rise from the black floor, swallowing Leo's legs in white glow.
"Good luck, kid. Try not to cause too many existential crises."
"Can't promise that," Leo muttered. "But fine. Let's see what the hell I can do with this."
The world dissolved into light—
And Leo fell once more.
The voice of the world sighed, the sound rumbling like thunder through the void.
"Well, it's done. He's replacing Tatsuro… Honestly, that guy was one hell of a failed protagonist. Let's see if this one actually works."
The void shimmered—
And a new thread of light shot downward, piercing the sky of another world.
---
Fuuma Village — Late Night
A storm raged outside. Rain lashed the tiled roofs, and the wind howled through the bamboo groves.
Inside a small traditional house, the air was thick with incense and panic.
"Hold on, Aoi! Just a little longer!" cried the midwife, voice tight with strain.
The woman on the futon, Fuuma Aoi, gasped through the pain. Her long black hair clung to her face, and sweat rolled down her pale skin. Her golden eyes—so much like her husband's—burned with exhaustion and hope.
Thirteen hours. Thirteen hours of labor, and still the child wouldn't come.
Her husband, Ryuji, knelt beside her, his dark skin slick with sweat as he gripped her hand tightly. "You can do it, Aoi. Just one more push. One more—"
A piercing cry split the night.
The storm outside stopped, just for a second, as if the world itself held its breath.
The midwife blinked, then smiled in awe. "It's… a boy."
Aoi's eyes widened with tears as she saw the small child placed in her arms. The baby's hair was dark, with faint silver strands shimmering under the lantern light. His skin carried a warm tone between both parents, and when his eyes blinked open—golden, bright, and focused—Aoi gasped.
"Those eyes… Ryuji, look."
Ryuji leaned closer, stunned. "They're… glowing."
The baby didn't cry anymore. He simply looked—calmly, curiously, as though he understood everything.
Aoi smiled weakly. "Leo… His name will be Leo."
Ryuji frowned softly. "Leo? That's not a traditional name."
"I don't know why," Aoi whispered, "but it feels right."
As she cradled the infant, thunder rumbled again in the distance—softly this time, like a heartbeat.
Outside, unseen by all, faint black-red veins of energy flickered beneath the child's skin before fading.
The midwife shivered. "Strange storm tonight…"
Ryuji exhaled, still holding his wife's hand. "He's healthy. That's what matters."
But above the clouds, a ripple passed through the heavens—a whisper of the Administrator's voice. "Good luck, kid. You're in for a rough one."
Aoi smiled softly as she rocked the newborn. "He's quiet. That's a good sign."
Quiet wasn't the word for it. Inside that tiny head, chaos reigned.
"WHY AM I STARTING AT AGE ZERO?!"
The furious thought came out as a high-pitched "Bwaaaah!"
Ryuji chuckled. "He's got strong lungs, at least."
Leo's golden eyes blinked rapidly as his infant brain tried to process his situation.
'Okay. Calm down. You're alive. You're… small. You can't move. You're drooling. Fantastic.
Oh great, now she's cooing at me. Yup. Total downgrade from opposable thumbs and a working vocabulary'.
He tried to raise his hand. Nothing but a tiny wiggle.
'I had hands that could turn into blades! Now I can't even lift a finger! What kind of downgrade is this?'
Aoi smiled, mistaking his furious baby noises for joy. "He's so expressive already."
Ryuji chuckled, brushing his son's hair. "Maybe he'll be a talker."
'Oh, you have no idea, Leo thought darkly. Just wait till I learn to speak'.
The baby sneezed, then blinked as tiny sparks of black-red energy flickered briefly across his fingers before vanishing. The midwife gasped softly but said nothing, thinking it was just a trick of the light.
Leo, however, noticed it.
'Wait… was that—? No way. Don't tell me it's already active…'
He felt it again — a faint hum under his skin. The virus. His power. It was there, dormant, waiting.
'Huh. Guess the cosmic intern wasn't lying. I really got the Prototype package'.
He yawned — because, apparently, his new body demanded it — and drifted off to sleep in his mother's arms, thinking:
'Alright. New world. New body. Same sarcasm. Let's see how bad this place really gets'.
Years Later — Age 6
The sun hung lazily over the hidden valley of Gosha. Training dummies lined the fields, the faint clang of steel and barked orders echoing in the air.
Among the younger students, one stood out — not because of skill, but because of attitude.
Leo Fuuma.
Dark skin, gold eyes, and a perpetual look of "I'm too tired for this anime nonsense."
He sighed, adjusting the practice sword in his hand. "Man, six years old and already swinging bamboo sticks like a budget samurai. Childhood speedrun complete."
He muttered it under his breath — but loud enough that one of the instructors frowned. "Fuuma Leo! Focus!"
"Right, sorry, sensei."
He went through the drills, his movements cleaner than most kids his age — partly because of the virus in his veins, partly because he didn't want to get smacked with another wooden rod.
While others tried to copy the rhythm, Leo's mind was elsewhere, analyzing everything like a gamer breaking down a boss pattern.
'Okay, so I'm half Japanese, half American. Dad's the reason for that — an ex-soldier or something who ended up joining Gosha. Pretty sure that makes him the first American ninja in this world. Kinda badass, not gonna lie'.
He parried a strike and rolled aside, earning a few impressed looks.
'And apparently, Mom's from the Fuuma line — the same one that's nearly extinct now. Canon stayed canon, which means… yup, I'm in the Taimanin timeline. Fantastic'.
He winced slightly, remembering the darker parts of that lore.
'This world's got demons, corruption, government conspiracies, and more "bad ends" than a visual novel speedrun. And I'm stuck here at level one with no tutorial'.
He glanced at his hand as he caught his breath, focusing. The faint hum beneath his skin — that familiar, dangerous pulse — was still there.
'I've been trying to trigger it for months now. Mercer and Heller could shape their bodies by instinct, right? So, theoretically….'
He stared at his palm and whispered, "Come on… activate…"
Nothing. Just the sound of wind and distant sparring.
Then — a shimmer.
His fingertips rippled slightly, the skin darkening like ink spreading in water before snapping back to normal.
Leo blinked. "Okay… that's progress."
From behind him, one of the younger trainees whispered, "Uh… Leo? What was that?"
He grinned, scratching his cheek. "Magic trick. Don't tell anyone."
Later that night, he sat beneath a tree overlooking the village, the stars reflecting in his golden eyes.
"So I've got power from a video game, ninja heritage from a dying clan, and knowledge of every canon disaster waiting to happen.
Well, looks like it's my job to make sure none of that goes down the same way".
He smirked slightly, leaning back with his hands behind his head. "And hey… if I'm gonna change fate, I might as well do it in style".
The next day, Leo found himself staring at the girl who was, apparently, his fiancée.
She stood with the confidence of someone who already thought she owned the sky — long dark-blue hair falling to her waist, sharp teal eyes glinting with challenge. Even as a kid, Asagi Igawa radiated presence.
[Insert image of Asagi Igawa]
'Right… the future leader of the Taimanin,' Leo thought, folding his arms. 'The pride and joy of the Igawa clan. The same clan that almost wiped out mine. And now she's betrothed to me. Oh, the irony.'
Asagi tilted her head, studying him. "You don't talk much, do you?"
Leo shrugged. "Not much to say."
She frowned, hands on her hips. "You're supposed to be my training partner. If you can't keep up, you'll embarrass both our clans."
'And there's the arrogance,' Leo sighed inwardly. 'Pre-canon Asagi, full of confidence and no humility yet. Classic.'
Out loud, he smirked. "I'll try my best not to ruin your reputation, princess."
Her eye twitched. "It's Asagi-sama."
Leo chuckled. "Sure, sure. Whatever you say."
She huffed and turned away, her ponytail swishing with dramatic flair. Leo just watched her go, amused.
'Should I change things already?' he wondered. 'No… too soon. This world's fragile enough. The butterfly effect is real, and I don't even know what version of canon I landed in yet.'
Still, as she barked at another trainee to fix their stance, Leo couldn't help but smile.
'Yeah… that's definitely her. Guess my childhood's going to be interesting.'
To be continued
Hope people like this Ch and give me Power stones, for people wondering about Leo Harem, go to the Auxiliatry Ch