DxD: The Pirate World

Gnar, who traveled to the world of One Piece, obtained the Bat Fruit, Phantom Beast Species, and Vampire Form that appeared in the movie version. It's just that although through the fruit of this phantom beast, he gained enough power to settle down in this world, Gnar, who has no interest in becoming the pirate king and has no idea of saving the world, is still lost on the road of life. Until that day, he met Nico Robin on the sea and successfully got her... This incident finally made him understand that in this chaotic sea, with powerful power, he seemed to be able to get more and more... Want to know well you have to add this book to you library and read it.