Originating as a gag-manga by Mine Yoshizaki, published in Shonen Ace starting in 1999, and every bit as goofy as its English title, Sergeant Frog would suggest, Keroro Gunsou is the story of a not-so typical Japanese family and the alien frogs who turned their lives upside-down. of the cast (including a robot duplicate of the sergeant mentally controlled by Keroro) shrinks down and enters his mouth to fight them off. Bow to the frog.)