He had been abandoned, mistreated.
A young boy thrown away like trash, his small body discarded among torn garbage bags and rusted scraps of metal. The rain fell steadily—cold, heavy enough to hurt. It streamed down his black hair plastered to his face, slid across his forehead, dripped from his chin. His already filthy clothes were now soaked, the heavy fabric clinging to his skin and revealing purple bruises and poorly healed cuts scattered across his fragile body.
The water pooling on the ground mixed with the blood still slowly trickling from a cut above his eyebrow. The murky puddle grew slightly, diluting the red into dirty shades of rust.
His hands were stained. Dirty, trembling fingers pressed against the rough ground, broken nails, small stones embedded in torn skin. The wounds burned beneath the cold rain, but he didn't react.
He didn't cry.
He didn't shiver.
He didn't complain.
His eyes remained open.
And empty.
It wasn't the emptiness of someone unconscious. It was the emptiness of something that had already been drained from within. A dull, exhausted gaze—far too tired for a child. A gaze that didn't expect help.
He had no surname.
Only a name.
Shugen.
Tap. Tap. Tap.
The sound of rain being cut through by firm footsteps echoed down the narrow alley. Unlike the water, those steps had weight. Rhythm. Confidence.
A silhouette stopped in front of him.
An old man.
Old only in the face.
His body was absurdly muscular—broad, solid, as if carved from stone. Wide shoulders. Thick arms. Veins bulging even beneath the cold rain. Gray hair fell carelessly to his neck, slightly plastered down by the water.
He wore a simple gray kimono. Soaked, yet still imposing.
"Hey, kid."
The deep voice cut through the sound of the rain as if the world itself had lowered its volume to hear him.
"Want to become a martial artist?"
It took Shugen a few seconds to react.
The question didn't make sense.
He was lying in the trash.
Bleeding and alone.
And the man had spoken as if he were inviting someone out for tea.
Shugen's eyes moved slowly.
"Are you crazy?"
The question came out without emotion. No tremor. Just a statement.
The man's expression changed instantly. His eyebrows shot up first, surprised. Then they twisted in an almost theatrical outrage.
"HAA?!"
The old man stepped forward, water splashing beneath his heavy feet.
"What did you say, you little brat?!"
Before Shugen could even react, large, calloused hands grabbed his soaked collar. The drenched fabric creaked under the brute force.
The world tilted slightly as he was lifted.
As if he weighed nothing.
Water streamed off his body, mixed with blood, dripping in slow drops back into the murky puddle below. His feet left the ground without resistance. His small body swayed in the air, supported solely by the absurd strength of that man.
But there was no reaction.
None.
No scream.
No attempt to break free.
No flicker of fear.
His face remained the same.
Morbid. Empty.
His eyes fixed on the old man directly—steady, almost cold. As if that violence were nothing more than another irrelevant detail in an already bad day.
The old man froze for a second.
'Not even a change… He didn't even blink…'
The old man narrowed his eyes.
Something about this bothered him.
Children cried.
Children screamed.
Children trembled.
This one didn't.
"What's your name?" the old man asked, his voice now less explosive, more serious.
"Shugen… Just Shugen."
The answer was simple. Direct. Without hesitation.
The old man stared at him for a few seconds that felt longer than they should have. The rain continued to fall over both of them, but the moment seemed isolated from the rest of the world.
Then, slowly, a smile appeared on the wrinkled face.
It wasn't gentle.
It was firm.
Decisive.
"Very well."
He pulled the boy a little closer, examining him as if assessing a rough blade about to be forged.
"Now you are my son."
The words fell heavy in the air.
And in that moment—dirty, beneath the cold rain that washed blood and garbage into the city's drains—the old man gave him something he had never had.
A full name.
"Shugen Kanzaki."
…
'It's been eight years since I reincarnated. It's still strange.'
Shugen stood beneath the small shelter of a bus stop, his eyes fixed on the water slowly sliding down the glass panel in front of him. The droplets traced uneven paths—some merging, others separating—as if following their own routes.
'I can't properly remember anything about my past life in that body. It's all blank for some reason.'
It wasn't like ordinary forgetfulness.
It wasn't like trying to recall a fading dream.
It was a solid void. A white wall whenever he tried to force any memory from before that alley, that cold rain, that name.
Shugen Kanzaki.
Rain fell across the entire city of Tokyo—dense and persistent—turning the streets into distorted mirrors of neon lights and reflections. The constant sound of droplets striking concrete and metal created a continuous, almost hypnotic noise. He sighed and began walking.
"So cold…"
He muttered quietly, more out of habit than real discomfort.
By the time he reached Shinjuku, the streets were still crowded despite the weather. People hurried along with umbrellas. Cars crawled over the soaked asphalt. Signs glowed against the gray sky.
Among them all, Shugen walked unhurriedly.
He wore black clothing—simple, functional. Black shoes with white details subtly contrasted with the rest of the outfit. The top was an ordinary hoodie, but the hood remained raised at all times, casting a deep shadow over his face.
His eyes were hidden.
Only the outline of his jaw and his mouth were visible.
His steps were steady. Silent. Far too natural for someone his age.
He paused briefly, observing his distorted reflection in a rain-soaked shop window. The image trembled with each droplet's impact.
'Work.'
It wasn't a normal job.
It wasn't something children did.
But he had never had a normal childhood either.
"Well, time to work."
Zoom.
No flash.
No light.
No loud sound.
Just a faint displacement of air.
And Shugen vanished into the rain, as if he had been switched off from the scene.
...
On a floor still under construction, surrounded by bare concrete columns and exposed steel beams, two men stood near an improvised table made of wooden planks laid over cement blocks.
The rain outside struck the metal framework, producing a hollow sound that echoed through the empty space.
"So this is the merchandise we're selling?" one of them asked, leaning in to look inside an open briefcase.
Inside were four certified syringes, filled with a dark liquid that looked far too dense to be anything ordinary.
"Yeah. From what I was told, we sell everything here. The price is up to us," the leader replied, staring at the syringes with almost greedy focus.
The building was isolated.
No workers.
No witnesses.
Or so they thought.
"So this is where you're hiding?"
A new voice emerged behind them.
Calm and cold.
Both men turned at the same time.
Standing at the open entrance of the floor, beneath the faint light filtering in from the rainy city, was a hooded figure. Black pants. Black-and-white sneakers. A dark hoodie casting a shadow that completely hid his eyes.
Shugen.
He slowly pulled one hand out of his pocket.
"Alright. Tell me—do you want to do this the easy way or the hard way?" Shugen asked as he began walking toward them.
Tap.
Tap.
Tap.
Footsteps echoed across the raw concrete, each one reverberating through the hollow space.
The two traffickers didn't hesitate.
The leader reacted first.
His right hand took on a bright metallic sheen. His fingers fused together, elongating and spinning rapidly until they formed a sharp drill bit that began rotating with a high-pitched whine.
『Quirk: Drill Hands — Allows the user to transform their hands and spin them like a drill.』
'A drill? Powers in this world are pretty cool… but sometimes weird and useless.'
Shugen clenched his free hand.
—
He punched the drill hand.
Crack!
The metallic drill shattered on impact.
The man's entire arm twisted backward at an unnatural angle, the metal breaking apart as if it were glass. Fragments scattered across the concrete floor.
"AAAAAAAAAAAAAHHHHHHHH!!!" The man dropped to his knees, clutching his destroyed arm.
Shugen slowly lowered his fist.
Without having taken even a single step back.
"Weak."
Without changing his expression, Shugen lifted his leg and delivered a direct kick to the kneeling man's chest.
Boom!
The trafficker's body was hurled violently against a concrete wall, deep cracks splitting through the structure. The impact echoed across the entire floor as chunks of cement broke loose and fell around him.
The other thug's eyes widened.
He reacted on pure instinct, grabbing the briefcase before it could topple over with the syringes inside.
"Ho~ Hand that over."
The voice came from behind him.
Too close.
Shugen was there.
No sound.
No transition.
As if he had simply appeared out of nowhere.
The thug froze.
By reflex, he tightened his grip on the briefcase.
Then something changed.
His skin began to deform. Shoulders, arms, back—sharp protrusions tore through fabric and flesh alike, as if blades were being unsheathed from within.
Slash!
Countless swords erupted from his body—metallic, thin, irregular. In the next instant, cutting shockwaves were unleashed in every direction.
The air was shredded.
Concrete was torn apart.
Columns were sliced through as if they were made of paper.
『Quirk: Sword Body — The user can sprout swords from their body that generate cutting shockwaves capable of slicing through solid materials like concrete, though not everything.』
Blades filled the entire floor, turning the space into a chaotic zone of destruction.
"Fiu~"
Shugen let out a low whistle.
His body moved with absurd naturalness. A single step to the side. A minimal shift of his torso. A simple turn of the hips. The cutting waves passed through the spots he had occupied fractions of a second earlier.
There was no rush.
The support beams began to give way.
The ceiling cracked.
The ground trembled.
The unfinished building couldn't withstand it.
With a growing roar, the structure started to collapse.
Shugen took one final step back.
And left the floor at the exact moment everything came crashing down.
Concrete and steel plummeted toward the street below, raising a dense cloud of dust and debris.
Seconds later—
He appeared on the wet asphalt, just a few meters from the collapse.
Dust still fell around him like a heavy mist.
Shugen adjusted his hood with one hand and brushed the debris off his jacket with two light taps.
The rain began dissolving the grime almost immediately.
"You bastard! How dare you interfere with our business!" the villain roared, emerging from the wreckage while carrying the briefcase and his fallen partner. Swords jutted from his shoulders, back, arms, and even his feet. "I'll—"
Flash!
Bisshha!
Suddenly, the thug felt something slice through his torso, and blood burst violently from the wound.
"If you want to make speeches, run for president, idiot," Shugen said, pointing at him. "Let's finish this."
As he aimed at the villain, Shugen spoke:
"『Dismantle』."
...
『Information:
Name: Shugen Kanzaki
Age: 13
Height: 1.70 m
Appearance: Image
Occupation: Middle School Student, Vigilante
Quirk
Bio-Energy: Shugen can manipulate his bio-energy; a vital energy generated and contained within a living body in various forms. This type of bioenergetic energy is present in virtually all physical beings and can be harnessed to express powerful physical abilities derived from different bodily functions, including flesh, skin, bones, organs, blood, etc. These can be converted into different forms of energy to enhance the body's power and manipulate it, allowing him to surpass his natural limits.
Essentially, Shugen's body functions as a biological reactor. Every bodily function — including:
Muscle contraction
Neural activity
Blood circulation
Cellular metabolism
Hormone production
Generates a massive amount of vital energy beyond the normal standard.
As such, Shugen's body sustains an internal energy density far above that of an average human. His tissues are constantly reinforced by this flow, resulting in his superhuman strength, endurance, and speed.
Despite all this, his Quirk also operates through Shugen's Biofield. The Biofield is a subtle energy field composed of electromagnetic fields generated by cells, tissues, and organs, which surrounds and permeates the body. Due to Shugen's Bio-Energy, this energy field is not visible, yet it exerts direct influence over physical matter.
The Biofield's basic functions are: Physical Amplification (increases strength, speed, and impact), Force Redistribution (reduces incoming damage by dispersing impact), and Energy Conversion (allows vital energy to be transformed into: Pressure, Propulsion, and Concentrated Vibration).
One advanced function of the Biofield is Shaping.
Shaping functions by giving form to energy.
Dismantle: An invisible slashing attack released by Shugen. So far, it has been shown that he needs to point in order to unleash the attack.
????: ????
????: ????
????: ????.』