Seafaring: I Capture Shanks from the Start and Drive Roger Mad

Klein transmigrates to the world of One Piece. An orphan of the Navy, he becomes Garp's adjutant.

Whenever he fights a powerful opponent, he can obtain a mission card and use the enemy's abilities.

In this era, Roger rules the seas, Whitebeard is famous across the world, the Lone Red takes on a thousand by himself, and the name of the Golden Lion, pirate admiral, strikes fear into people's hearts.

Meanwhile, Klein, clad in a coat of justice, copies the abilities of these powerhouses and leads the entire Navy in forging a whole new world!

He is the pirates' nightmare.

He is the guardian deity of ordinary people.

He is the next Fleet Admiral, White Horse Admiral Klein, acclaimed as such by four million Navy soldiers.

And he is the Navy whom the Five Elders declare to be a greater menace than the Four Emperors!

Roger: "The Great Age of Piracy will be a lot more fun because of him."

Whitebeard: "I really wish this guy were my son!"

Red-Haired Shanks: "You think I lost my left arm how?"

The Paramount War, Marineford...

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.