I'm Rocks' Son: I Destroyed Impel Down from the Start

After transmigrating to the world of One Piece, he became the only child of Rocks. To uncover the secret within Kashu, the World Government launched the God Valley War.

They imprisoned him on the seventh level of Impel Down and used a special drug to keep Kashu asleep for 36 years.

After 36 years of slumber, Kashu awoke and brought boundless terror to the World Government and the Marines.

Whitebeard: Anyone who hasn't experienced Kashu's terror firsthand can't understand what a monster really is!

Shanks: Just because I was an intern on Roger's pirate crew back then, my crew had to be wiped out?

Sengoku: Damn it! The real demon has broken out of its cage!

The Five Elders: Hurry, go to the Holy Land and fetch Lord Imu! What? Even Lord Imu can't handle him? Then there's nothing we can do. Let's wait to die!

The demon is loose, and the world trembles!

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