One Piece: I'm Obito Uchiha, Setting Sail with the Pirate Empress

[Power Fantasy + Dual Systems + One Heroine + Wild Imagination + One Piece and Naruto + Infinite]

[The Empress's Haki grows without limit, granting her infinite abilities from the One Piece world, including but not limited to Devil Fruits and abilities of special races]

[Obito's chakra grows without limit, granting him infinite abilities from the Naruto world, including but not limited to kekkei genkai and special bloodlines]

P.S. The Empress's abilities are all based on the One Piece world, and Obito's are all based on the Naruto world. Expect plenty of high-octane action!

After transmigrating into the One Piece world, I find out I'm Uchiha Obito, and I start with two Mangekyo Sharingan?!

[Go become the Pirate King... no, the King of the World!]

Obito: “A joint alliance between the Marines, pirates, and World Government? Sounds good, but... what can you do about it? Right, Hancock?”

The Empress: “Hmph, of course... Perfect Susanoo: Flame Dance, Conqueror's Haki infusion, power-up!”

[Two powerful characters with two Systems: Obito and the Empress each have their own independent System, as well as a shared one. With wild ideas, they will conquer the four seas]

P.S. 2: The timeline differs from the original, so readers, take note!

P.S. 3: The Kuja Pirates will gain new members later on, mostly women. Obito and Hancock will face off against multiple factions at once, including the Marines, pirates, and World Government!

P.S. 4: The whole story is action-packed. By the later stages, the Empress and Obito will reach levels beyond the Four Emperors, even beyond the Pirate King. Their ultimate goal... the King of the World!

[You can also check the author's notes for lots of important information. The Straw Hat Pirates will become allies later on, but Nami and Robin will both join the Kuja Pirates]