I Fused with One Piece and Became the Mastermind

Bai Haiqing transmigrates to Tokyo, bringing with him the world of One Piece.

The world is heading for destruction. Monsters prowl the city streets, terrifying demons lurk in the shadows, and monsters from the sea bare their claws against the land.

Unknown enemies come from the dimensions of fantasy in Bai Haiqing's previous life. Kibutsuji Muzan, the Nine-Tailed Fox, the Nine Titans, vampires, werewolves... they descend upon the world.

For the sake of world peace and eternal life, Bai Haiqing uses the merged One Piece world to establish a supernatural organization, become the source of supernatural power, and reap the rewards.

To those he grants abilities, he is not stingy: he only takes 70% of the power you cultivate. The rest is yours to save the world with. Just don't let monsters and demons disturb me while I'm wooing women and pursuing immortality.

Ensemble cast, alternate universe, parallel world.

A demon hunter who commands thunder, a Rock Lord who rules over volcanoes, an extreme queen who freezes the seas, a Buddha who holds dominion over heaven and earth, a Azure Dragon King who reigns supreme, and a girl who splits the sea of clouds with her sword.

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