One Piece: From the Start, I Parasitized Kaido

[Pirate King + System + farming + fake harem + invincible in the later arcs] Zhao Xinglong, who had been grinding away at Pirate King, dies in an accidental electrocution and transmigrates to the world of pirates. His twin souls split in two, each taking up residence in a different person: the future Four Emperors Kaido and Taylor, a Celestial Dragons’ slave. It all seems to be going great! What? I have to compete in a battle-slave tournament? How is a seven-year-old kid supposed to handle that? What? Kaido is still alive? Then what’s the point of possessing him? Kaido: “Worororo! Ace, be my son-in-law!” See how Zhao Xinglong rises to the top of the pirate world, one step at a time!!