One Piece: Became Ace Luffy's big brother at the beginning

Introduction: Reborn in the world of pirates, He Tianyou becomes Garp’s eldest grandson. Bind to the equivalent exchange system, you will become stronger if you pay. As a result, a unique being appeared in the world of pirates. Luffy: Big brother’s beating hurt me, but the barbecue is really delicious. Karp: Although it’s a bit embarrassing to go through the back door, the Moutai is delicious and the senbei is delicious. Brother Ming: I really found a good partner, that is...