"I Reincarnated in Boku no Hero but They Forgot to Give Me a System"

Chapter 17 — Haki in the Blue Flames

Another year had passed.

Aoi was now six years old, but his body was no longer that of an ordinary child.

His muscles were defined and hardened like those of a seasoned athlete, forged through countless hours of grueling training. His reflexes, almost superhuman, had become a weapon in themselves.

With forty tons of raw physical strength under his belt, he had surpassed any imaginable limit for someone his age. His small frame carried the weight of a titan, and yet he moved with surprising grace and precision.

He had mastered the Six Marine Styles — although still at an early level — but enough to be recognized by others as a rising force to be reckoned with.

His control over the mysterious blue flames that flickered and danced along his body had evolved at a terrifyingly rapid pace. The flames flowed from him as if they were alive, weaving in perfect harmony with his every movement. They now resembled the very flames of Shinra Kusakabe from the earliest chapters of Fire Force, vibrant and full of life.

That afternoon, Aoi rested on the worn sofa in the living room, breathing heavily after another insane training session. The clear sky outside the window mirrored the brief calm that had settled within the otherwise silent house.

Staring up at the ceiling, Aoi let his mind wander through the memories of the past year — moments both painful and precious.

He thought of Christmases spent with his mother, where joy, although fleeting, was genuine. The rare smile that had appeared on Shoto's face after so long was a beacon in the darkness. Despite all the hardships, Rei's regular visits were the flame that kept their fractured family alive. Shoto's smile was becoming more frequent, and the hatred that had once consumed him had finally begun to ebb.

Closing his eyes, Aoi felt the weight of the choices his mother had made — the sacrifices that had kept their family from completely falling apart.

"Her decision to live away… that was what kept this family alive.

If she had stayed, this fragile bond holding us all together would have snapped long ago."

Through the window, Aoi could see Shoto training with Endeavor in the backyard. The atmosphere was tense, as always, heavy with unspoken words and burdens carried silently. But in Shoto's eyes, he detected something new — a fragile balance, a hint of peace amidst the storm.

Aoi rested his elbows on his knees, lost in thought.

"I've already mastered the basics of the Six Styles.

I can fly, harden my body to stone, move at speeds that blur the eye, and even slice the air with my kicks.

But… I'm still nowhere near the monsters I aspire to become."

A wild idea sparked in his mind — bold and reckless.

What if… he created his own Hakis?

Rising from the sofa, Aoi's eyes shone with a newfound fire — a hunger for something greater.

"It sounds crazy… but with the understanding I have, it's not impossible."

His face lit up as he spoke aloud, explaining the impossible to himself.

"Because of the soul fusion when I reincarnated, my ability to grasp complex concepts, structures, and phenomena goes far beyond what anyone else could manage.

I can take the incredible things I've seen in anime — things no ordinary person could understand — and analyze exactly how they would function in reality."

He raised his hand, and the blue flames that had become a part of him flared brighter, more intense than ever before.

"If Observation Haki lets you sense presence and predict movements, maybe I could develop something similar using the thermal vision of animals.

By channeling my flames into my eyes with precise control, I could track heat, movement, and even the faintest emotional fluctuations."

He closed his eyes, carefully visualizing how this ability would work in perfect harmony.

"Observation Haki will be possible. I just need to train my focus, sharpen my senses, and control it perfectly."

Looking down at his own fists, where the blue flames spiraled gently, Aoi's mind raced with more ideas.

"Then there's Armament Haki.

If I compress my flames until they become as dense and solid as steel, I could create a living armor.

Something that covers my arms, legs — or maybe even my entire body."

A small smile crept onto his lips.

"If I redirect the propulsion force inward, it could become pure physical power.

Strength and hardness combined into an unstoppable impact."

But what excited him most was the third idea — the most daring of all.

"What if… I fused my willpower with my flames to create Rei Haki?"

He stood and walked to the backyard, raising his fist to the sky.

The flames around his hand ignited fiercely, pulsing with energy.

Closing his eyes, he poured his entire heart and soul into the burning blaze.

"A flame that represents my spirit.

My soul.

A fire that blooms and grows stronger with my emotions."

"If I can achieve this… I will create something entirely new.

A Haki unlike any other — something unique, born from my very being.

A Haki that represents my truth."

Confidence surged through him like a tidal wave.

"I'll call it Heroic Haki."

The flames flickered and danced, as if acknowledging and embracing the name.

In that moment, Aoi knew without a doubt —

If no one in this world had ever wielded something like this before, then it was his destiny to create the impossible.

With his unparalleled understanding.

With strength that shattered every limit.

And with flames that bloomed not to destroy — but to protect.

His journey was far from over.

But the path was clear.

He was no longer just a child chasing dreams.

He was becoming a legend — a hero forged in blue fire and unbreakable will.

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