One Piece: Pink Dragon

An earthling dies and is reincarnated as Tanzo, a young marine, who was being held as a slave by human traffickers. Tanzo hears the leader of this human trafficking gang say that they are heading towards Punk Hazard. Through some series of events, he managed to get to the laboratory and find Vegapunk's artificial devil fruit. With his past as a marine, Tanzo wanted to return to the Navy, only to find out that he was labelled as a deserter and his family comitted suicide from all the humiliation. Since Tanzo's body was possessed by the earthling, he promised to take revenge for Tanzo.