One Piece: Seaside System Novel

Kaden finds himself trapped in an alien ocean world within a stranger's body, serving as a low-ranking marine in waters where only the strongest survive. Imprisoned by his station, he confronts a merciless power hierarchy where the weak become prey for those above. An impending war threatens to devastate the entire realm, with the ocean's mightiest rulers ready to claim dominion over all. Equipped with his Gamer System, Kaden must master these treacherous seas and navigate cutthroat politics to carve his path forward before catastrophe strikes.