One Piece: Immortal for a Thousand Years

After gaining the power of a fruit that grants eternal youth for a thousand years, a shut-in transmigrates to the world of the Pirate King.

I shall become a great pirate, ageless for a thousand years and everlasting, and build an empire that will endure for millennia.

A great pirate with the strength of a peak-level king, and a massive harem.

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.