Kaizoku Ouji

Kid grew up on a floating island in the Caribbean Sea, living a peaceful life among animals. His foster father, who raised him, is dying and tells him he is not his biological parent. On his deathbed, the foster father discloses that Kid's real father is Captain Morgan, the ruler of the seven seas. Determined to find his father, Kid begins his journey but discovers that Morgan is already dead. Rival pirates, including Tiger Hook, seek to claim the position of ruler. To safeguard the seas, Kid takes over his father's ship and becomes its pirate king.