I'm Luffy! The Man Who Will Become the Pirate King!

A band of pirates led by Alvida plundered a ship, only to find a barrel which contains a strange boy named Luffy. Luffy is on a quest to find the legendary treasure "One Piece" and he befriends the ship's cabin-boy, Koby, who actually wants to become a marine officer. Luffy defeats Alvida and the two journey on in search of crewmates.