The humid summer air clung to Tsunetaka's skin as he shuffled through the crowded streets of City Z, twenty years after his reincarnation and five years after recognizing this world for what it was. His tiny fingers gripped his mother's hand, the scent of ramen from a nearby stall mingling with the ever-present tension of potential disaster.
At five years old, Tsunetaka had already mastered the art of acting like a normal, slightly precocious child. While his parents enjoyed their pork ramen, his mind raced with terrifying certainty.
This wasn't just Japan. It was the One-Punch Man universe.
Tsunetaka's innocent eyes watched the adults around him with a mix of fascination and dread. He knew he couldn't break his limiter like Saitama - no matter how hard he tried, he remained an ordinary human. This realization had struck him like a ton of bricks at age five.
By twelve, he was already a third-degree black belt in karate and taking private kenjutsu lessons from a stern old master in a rural dojo. His body was wiry and strong for his age, muscles honed through relentless discipline.
But every time his blade sliced through bamboo or cracked through solid pine boards, the same thought echoed:
*It's not enough.*
That was the mantra that haunted him every morning at dawn. Every striking pose, every precise cut, every grueling session under the midday sun - all of it felt hollow. In a world where monster attacks were a weekly occurrence, where Disaster Level Demon could tear through a city block in minutes, martial arts were merely a prettier way to die.
The scent of iron and smoke hung heavy in the air as Tsunetaka stumbled through his front door, his practice blade still drawn and trembling in his grip. The living room was a ruin - shattered glass, overturned furniture, and the unmistakable crimson stains of his parents' lives painted across the walls.
And the body of the monster lay slumped in the corner, dissolving into black goo.
The grief was a cold weight in his chest, pressing down as he stared at the evaporating corpse of the monster that had murdered his parents. His practice sword clattered to the ground, his hands shaking violently.
Then, something shifted. A flicker in the periphery of his consciousness.
**[SYSTEM INITIALIZING...]**
Tsunetaka froze.
A translucent blue screen materialized before his tear-filled eyes, overriding his grief instantly.
**[NEW MIMICRY ASSIGNMENT: YORIICHI TSUGIKUNI]**
**[SOURCE: Demon Slayer Universe]**
**[ABILITY: Sun Breathing / Original Breathing Techniques]**
**[CURRENT LEVEL: 1 (Beginner)]**
**
**[SYSTEM OVERLAY - MIMICRY STARTING...]**
**[BODY OPTIMIZATION IN PROGRESS... PHYSIQUE ADJUSTED TO BASE LEVEL YORIICHI TSUGIKUNI.]**
Tsunetaka gasped as heat flooded his veins, every muscle rippling and reforming. His cracked knuckles healed, posture straightened.
**[NEW ABILITIES ACQUIRED:]**
- **Level 1 Sportsmanship:** Basic physical enhancement.
- **Level 1 Sun Breathing Access:** Capability to perform First Form: *Dancing Sun.*
- **Demon Slayer Mark:** A thin crimson pattern blooming across his cheek.
- **Level 1 Transparent World:** Limited perception of movements.
As the system's enhancements settled, Tsunetaka stood in the wreckage of his home, his body now capable of mimicking Yoriichi's First Form of Sun Breathing— *Dancing Sun*. His movements became fluid, his grip on his practice sword suddenly more natural, more lethal. However, a deeper coldness remained. His parents were still gone.
The grief burned hotter than any flame, fueling a resolve that had never existed before. He buried his parents beneath the wisteria tree in the backyard—the same tree his mother had planted years ago. He didn't cry. He didn't have time.
**[MISSION LOG UPDATED]**
**[PRIMARY OBJECTIVE: SURVIVE. GROW. PROTECT.]**
**[SWORD MASTERY: LEVEL 1 (0/100)]**
**[SUN BREATHING - FORM 1: DANCING SUN: LEVEL 1 (0/100)]**
**[DEMON SLAYER MARK: INACTIVE (Requires Extreme Stress to Trigger)]**
**[TRANSPARENT WORLD: LEVEL 1 (0/100)]**