One Piece: Utopia on the Sea Floor

Haven't you ever wondered what was at the bottom of the seas in the world of One Piece? The only island ever explored was Fishman Island. There was so much more to discover that was never mentioned. What would you do if you had the chance to find out? Would you simply explore the unseen part of the One Piece world, or would you build an underwater kingdom or even an empire? Would you just observe the story as it unfolded, or would you interfere?

This is a tale that answers those questions.