The rain in the East Blue didn’t fall; it assaulted.
It was a cold, driving sheet of water that turned the cobblestone streets of this nameless port town into a slick, treacherous hazard.
I was fifteen years old.
I had been hunting pirates for a solid year.
My bounty ledger was full of crossed-out faces, and my reputation as the “Demon of the East Blue” was firmly cemented in the terrified whispers of tavern patrons and corrupt Marines alike.
I had a pocket full of Berries, a belly full of whatever I could hunt or buy, and an ego roughly the size of a Marine galleon.
I honestly thought I had figured it out.
I thought my self-taught, masochistic training regime of eating mild poisons, carrying boulders, and swinging three swords until my gums bled had elevated me above the natural limits of this world.
I was an idiot.
I leaned heavily against the brick wall of a dark, dead-end alleyway.
The rain washed over my face, but it couldn’t wash away the thick, hot blood pouring from my chest.
A massive, jagged gash ran diagonally from my left shoulder down to my right hip.
My green haramaki was soaked through, the fabric torn to shreds.
My left thigh burned with a deep, pulsing agony where a serrated dagger had been driven straight to the bone.
At the end of the alley lay the broken, unconscious bodies of the ‘Iron-Mace’ Pirates.
They weren’t warlords.
They weren’t Emperors of the Sea.
They were a mid-tier, C-list pirate crew that had managed to scrape together a combined bounty of twenty million Berries by terrorizing defenseless merchant ships.
Their captain, a hulking, eight-foot-tall brute named Galdor, was currently slumped over a pile of trash crates, his massive iron mace shattered into three pieces.
I had won.
Of course I had won.
But as I slid down the slick brick wall, my legs finally giving out, the victory tasted like ash and copper.
I coughed, spitting a wad of blood onto the wet cobblestones.
Every time I inhaled, my ribs ground against each other.
Galdor hadn’t been a skilled swordsman.
He hadn’t possessed Haki or a Devil Fruit.
He was just a massive man who swung a two-ton chunk of iron with the desperation of a cornered animal.
When my standard practice katanas had met his mace, they hadn’t cut through it.
They had chipped.
The sheer kinetic force of his swing had bypassed my dense muscle tissue and rattled my organs.
And while I was busy dealing with the captain, his first mate—a cowardly little weasel with poisoned daggers—had flanked me.
My ‘Iron Stomach’ was currently working overtime, burning like a furnace in my gut to neutralize the neurotoxin coursing through my veins.
I wouldn’t die from the poison.
But my muscles were tearing, my reflexes had slowed, and I had taken hits I should have easily dodged.
I looked down at the weapons resting in my lap.
My two standard katanas were ruined.
The edges were jagged, the steel warped and cracked from parrying the iron mace.
They were useless pieces of scrap metal now.
Only the Wado Ichimonji, resting quietly in its pristine white scabbard on my left hip, remained undamaged.
I had used it to deliver the final, decisive blow, but I felt a sickening wave of guilt just looking at it.
I was weak.
The realization hit me harder than Galdor’s mace.
I had spent the last seven years convinced that sheer willpower and physical conditioning could break the timeline.
I had padded the stairs.
I had eaten tree bark.
I had isolated myself and trained until my hands bled.
And a twenty-million Berry pirate in the *weakest sea in the world* had nearly gutted me in a dirty alleyway.
If this was my limit, if this was the absolute peak of my self-taught Three-Sword Style, how was I ever going to survive the Grand Line?
The monsters waiting on the other side of the Red Line had bounties in the billions.
They could shatter islands with a single punch.
They could manipulate reality, turn into dragons, and coat their blades in invisible, world-breaking armor.
And Mihawk?
Dracule Mihawk, the man I had to defeat to fulfill my promise?
He would look at me, swing a pocket knife, and I would cease to exist.
I rested the back of my head against the cold brick, letting the rain pummel my face.
I thought about Kuina.
I thought about the fierce, unyielding fire in her eyes on the night of our 2001st duel.
I thought about the heavy, crushing weight of the slate roof tile, and the deafening silence of the dojo after she was gone.
I had promised her that my name would reach the heavens.
I had promised I would carry her will.
But I was just a kid playing with swords, pretending that sheer stubbornness could compensate for a lack of true, life-or-death experience.
My passive gains had capped out.
Lifting boulders couldn’t teach me how to cut steel.
Eating poison couldn’t teach me how to sense intent.
I had hit the ceiling of the East Blue, and the ceiling was suffocatingly low.
“I’m sorry,” I whispered to the empty alley, my voice barely audible over the pouring rain.
My hands trembled as I rested them on the Wado Ichimonji.
“I’m nowhere near strong enough, Kuina.
I’m just…
I’m stuck.” I closed my eyes, waiting for the inevitable, cheerful *DING* of the System.
I fully expected it to pop up with a sarcastic offer.
*[The ‘Band-Aid System’ detects massive hemorrhage!
Bind now for a magical health potion!]* I was ready to spit blood at the hologram and tell it to go to hell, just like I had for the last seven years.
But the familiar, cheerful chime never came.
Instead, the alleyway was suddenly bathed in a stark, blinding light.
It wasn’t the usual translucent, sky-blue color of the pop-up ads I was used to.
It was a deep, pulsing, blood-red glow that cast long, terrifying shadows against the brick walls.
The air grew heavy, static electricity making the hair on my arms stand up.
A massive holographic screen materialized in front of me.
It didn’t have a bouncy font or a quirky mascot.
The text was sharp, jagged, and radiated an ominous, heavy energy.
**[WARNING: Host’s mental stability and physical condition have reached a critical threshold.]** **[Analysis Complete: The Host has reached the biological and environmental limits of self-guided cultivation within the current designated zone (East Blue).]** **[The timeline remains fixed.
Conventional strength cannot rewrite the concept of Death.]** I stared at the red text, my breath hitching in my chest.
The pain in my thigh dulled, entirely overridden by the sheer, imposing presence of the screen.
“What is this?” I rasped, coughing up another speck of blood.
“No magical swords today?
No cheat codes?” The screen flickered.
For the first time in seven years, it didn’t just display text.
A mechanical, genderless voice, devoid of any emotion, echoed directly inside my mind.
It sounded like grinding metal.
*”The System has analyzed your soul, Roronoa Zoro.
For seven years, you have rejected all external assistance.
You have subjected your vessel to extreme, localized trauma.
Your stubbornness is statistically anomalous.
However, your current trajectory results in a 99.9% probability of death upon entering the Grand Line.”* “Tell me something I don’t know,” I muttered, gripping the hilt of my white sword.
*”The System does not offer cheat codes to souls that require them,”* the voice continued, entirely ignoring my sarcasm.
*”Existential Energy—the currency required to alter fixed laws of reality, such as Death—can only be harvested by a soul forged in genuine, localized despair.
Your refusal of easy paths has conditioned your soul.
Your current despair has provided the necessary catalyst.”* **[Initiating Final Wager: The Resurrection Protocol.]** My heart stopped.
I forgot about the rain.
I forgot about the blood pooling around my legs.
I stared at the word on the screen, my eyes wide.
*Resurrection.* *”The System offers a binding contract,”* the voice echoed.
*”You will be transmigrated into a series of highly lethal, parallel-world simulations.
You will not enter as a god.
You will enter bound by the rules of those worlds, assuming the role of a native entity.
You must survive, adapt, and fight until the narrative concludes or your vessel expires.”* “And if I die in there?” I demanded, my voice tight.
“Do I die for real?” *”If your simulation vessel expires, your soul will be returned to this exact moment in time,”* the System replied coldly.
*”However, if you fail to complete the narrative objectives, or if you break under the pressure, the existential energy will be forfeit.
The protocol will permanently lock.
The path to resurrection will close forever.
You will remain in this alley, weak and limited.”* I looked down at my blood-soaked hands.
For seven years, I had held onto my pride.
I had refused to be a pawn to a glowing screen.
I wanted to earn my strength.
I wanted to prove that a lazy guy with enough spite could rewrite the world on his own terms.
But Kuina was still in the ground.
And I was bleeding out in an alley because of a third-rate pirate.
Pride wasn’t going to bring her back.
**[Reward for Successful Completion of all Simulations: The accumulation of sufficient Existential Energy to defy the Fixed Point of Kuina Shimotsuki’s death.]** **[Do you accept the wager, Host?]** **[Y / N]** The red ‘Y’ pulsed like a heartbeat.
I didn’t care about the rules anymore.
I didn’t care about the pain that was waiting for me in these parallel worlds.
If I had to fight my way through a hundred different hells, if I had to let this parasite bind to my soul just for a fraction of a percent of a chance to see her standing in the courtyard again…
it wasn’t even a choice.
“I accept,” I growled.
I forced my heavy, trembling arm upward.
I reached out, my bloodstained fingers pressing firmly against the glowing red ‘Y’.
**[Contract Sealed.
Soul Binding Complete.]** A searing, absolute heat erupted in my chest, completely burning away the cold of the rain.
**[Commencing Soul Transfer.
Generating Simulation Parameters…]** **[First World Selected: Demon Slayer (Kimetsu no Yaiba).]** **[Role Assigned: Sanemi Shinazugawa’s Younger Brother.]** **[Warning: Host’s baseline physical traits are severely restricted to match world parameters.
The ‘Iron Stomach’ trait has been successfully integrated into the simulation vessel.]** **[Objective: Survive.]** The brick alleyway, the pouring rain, and the broken bodies of the pirates dissolved into a blinding, suffocating white light.
The sound of the East Blue faded away, replaced by the howling, biting wind of a snowy mountain peak and the sickly, sweet stench of rotting flesh.
My eyes snapped open.
I wasn’t in an alley anymore.
I was standing knee-deep in a snowdrift.
I was smaller, younger.
The heavy green haramaki was gone, replaced by a simple, freezing kimono.
I reached for my hip out of instinct.
The Wado Ichimonji was gone.
In my hand was a single, unfamiliar sword.
And charging directly at me through the snow, screaming with a feral, bloodthirsty hunger, was a creature with grey skin, excessive veins, and eyes completely devoid of humanity.
A demon.
I looked at the monster.
I looked at the single sword in my hand.
Then, I felt the familiar, burning furnace of the ‘Iron Stomach’ kick to life in my gut.
A slow, feral grin spread across my face.
“Finally,” I whispered, raising the blade.
“Something I’m actually allowed to eat.”