Tamagotchi Honto no Hanashi

Years ago, the fearsome Pirate King, Gol D. Roger was executed leaving a huge pile of treasure and the famous "One Piece" behind. Whoever claims the "One Piece" will be named the new King of the Pirates. Monkey D. Luffy, a boy who consumed a "Devil Fruit," decides to follow in the footsteps of his idol, the pirate Shanks, and find the One Piece. It helps, of course, that his body has the properties of rubber and that he's surrounded by a bevy of skilled fighters and thieves to help him along the way. Luffy will do anything to get the One Piece and become King of the Pirates!

AD 3567. The human beings has lost their once civilization, and they are living on the desolated grounds. Although their lives are frightened by Gardener, a mysterious unmanned mobile weapon sent from the moon, strong boys and girls become Gardener hunters to earn daily bread. Furthermore, although the civilization was ruined, because of the high-tech maintenance free technologies, limited functions of cities are still working to support people’s lives. Then, a boy’s visit to a city opens the door of their destinies…

On a test-run of the Mini Merry, Usopp tells Brook the story of the Going Merry, a ship that served the crew well. However, to the Straw Hats, the Going Merry was not just a ship: It was a priceless, irreplaceable friend. *Scenes have been recreated with brand-new animation.

Desperate for cash, the Straw Hat Pirates enter a secret race between pirate crews known as the Dead End Competition. There, they must battle against powerful people, including the bounty hunter who wants to kill Gasparde and a climatic battle with Marine-turned-pirate Captain Gasparde.

After Nami steals the Going Merry, Roronoa Zoro, Usopp, and later Monkey D. Luffy and Sanji (along with Johnny and Yosaku) set after her and wind up in Cocoyasi Village, Nami's hometown ruled by the tyrannical fishman Arlong. It is here that Nami's past and true motives come to light.

The Straw Hat Pirates send Luffy to look for food in the Mini Merry II, only for Luffy to get lost and deviate from the path. Then he meets Galley's ship, a pirate. Meanwhile on an island, they realize that Galley's pirate ship is approaching, and a young girl named Silk decides to fight to protect her treasure.