Idle Level-Up in One Piece Novel

Klein finds himself reincarnated into the One Piece world during the era of legendary marines like Garp, Sengoku, and Zephyr. Recognizing his lack of natural talent, he abandons any grand ambitions and settles for a modest goal: become a branch commander at some obscure Marine outpost where he can live quietly and die peacefully. Everything changes when Klein's golden finger activates—a peculiar idle mobile game from an obscure developer. The game proves surprisingly generous; the first top-up grants Conqueror's Haki, and the gacha pool offers a legendary skill called Divine Departure. By continuously recharging and pulling from the gacha, Klein accumulates extraordinary power. When Klein eventually confronts Gol D. Roger using Divine Departure, even the Pirate King is left stunned by his strength. Klein embraces his newfound path, declaring that true power comes through recharging. As he puts it: "Recharge once for instant joy. Keep recharging for eternal bliss."