The Grand Line: My Martial Arts Have Mutated

After transmigrating to the world of One Piece, Ryoma unexpectedly obtains a God-Tier Martial Arts System. He can grow stronger by collecting Devil Fruits.

Years later, Kaido drops from the sky. It's his 2,458th suicide attempt, and this time he almost succeeds.

Ryoma: "I was walking down the road when a bunch of sweaty guys suddenly appeared. In a panic, I blocked them with my hand..."

Kaido, in tears: "I'm done for! I'll never show off again. I just want to live in peace!"

Ryoma: "I was terrified at the time!"

Kaido: "I was even more terrified!"

Akainu: "The Dragon-Slaying Swordsman is truly terrifying!"

Mihawk: "I, Dracule Mihawk, hereby recognize him as the greatest swordsman!"

Edward Newgate: "I'm nowhere near his equal!"

Shanks: "Give me a break... and a face mask. The sea breeze has been drying out my skin lately!"

Garp: "The seas... are changing!"

Dragon: "This is... one man's revolution!"

..

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.