A transmigrator arrives in the world of One Piece and obtains the “Saitama Template.” After quietly training in Windmill Village for three years, he becomes invincible. Guided by the philosophy of “doing it for fun,” he joins the Marines and roams the seas as a caped, bald hero. He seeks neither power nor fame. He just wants to punish evil whenever he feels like it, eat discounted food, and occasionally get lost... Yet his existence throws the Marine high command, the Seven Warlords, the Four Emperors, and even the World Government into chaos.
This is an invincible-style Marine slice-of-life story with a dry sense of humor. The protagonist crushes everything with overwhelming strength, yet always thinks of himself as just an “ordinary Marine.” He has no intention of changing the world, but the world changes because of him.
