One Piece: the Great Swordsman's Journey Through All Realms

When the time traveler Roja, who became a great swordsman, was tired of the fatalistic world of pirates, he was rejected by the will of the world and traveled again. As he travels through unknown worlds, please see how he cuts off the shackles of fate with the knife in his hand. [The protagonist does not know the plot] [The first world is Harry Potter] [Possible worlds that will appear in the future (tentative): Naruto, JOJO, Avengers, Avatar, Return to One Piece...]