They Said I’m Mr. Gu’s Scandalous Affair - Chapter 19

The novel is about an author who was reincarnated into his novel.This author thought that he would become a hero, like he always wished, but no, his fate was to become a Villain.His fate was to fight against humanity and against the supreme beings who were planning to invade the world.

Having being plagued by same dream for the past six years, Chu Yanshen discovered a little boy who looked just like him out of the blue. It was only then did he, Chu Yanshen, learn that he had been deceived by the little lass six years ago…

- Description from Novelupdates

Crossing to One Piece world, he became Roger’s younger brother.