One Piece: The Strongest Devil Fruit Earns Me a Marine Admiral's Bounty

(Comic-book style + no System + does not transmigrate) A Devil Fruit with a starting bid of 500 million Berries at the Sabaody Archipelago auction ultimately sells for five billion. The Marines spare no expense or manpower to obtain it, only to have it switched out at the last moment. A young man accidentally eats the fruit, shattering the Marines' dream and setting out on the lonely path to becoming a king...