One Piece: The Seastone That Gained Sentience

A game tester transmigrates to the world of One Piece with a game System and becomes a Seastone monster.

Sengoku: "You're saying one piece of Seastone wiped out an entire Marine Branch?"

Garp: "You might not believe this, but one piece of Seastone punched my fist clean off."

Akainu: "He's the enemy every Devil Fruit user least wants to face."

Dragon: "Today, the Revolutionary Army welcomes a new officer: Seastone!"

This is the story of a piece of Seastone building a harem, deciphering the Poneglyphs, uncovering the Void Century, and leading the Revolutionary Army to rule the world.

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