One Piece: I, the Fourth Admiral, Am Only Eight Years Old

An eight-year-old prodigy just obliterated a 300-million-bounty pirate with a single strike—and he's Akainu's little brother?! Fleet Admiral Sengoku can barely believe his eyes as the boy casually demands an Admiral position. When Akainu scoffs at the audacity, one devastating punch sends the legendary admiral flying across the room. Now the Marines face an impossible choice: reject a child who surpasses their greatest warriors, or promote him and shatter every rule in the book. Summer has arrived, and the seas will never be the same.