One Piece: The user of the Nen-Nen Fruit, who overturned the sea.

In the vast world of One Piece, a new and powerful user of the Nen-Nen Fruit emerges. Roy, a prodigy with the Mind-Mind Fruit, is perplexed when his strength is surpassed by a mysterious user of the Float-Float Fruit. As Roy navigates this new reality, he encounters a group of future powerhouses, including Luffy, Barrett, Mihawk, Tezzo, and Crocodile, who are all still young and on the cusp of their destinies. With a cunning plan, Roy lures each of these future legends onto his own ship, one by one. As Luffy sets sail, Roy reflects on his own ascension to power, exclaiming, "Oh no! I've become the world's ruler!" Roy's ultimate goal is to explore the New World with Luffy, but first, he sends his "brothers" ahead, determined to understand the true extent of Luffy's abilities.