Keroro Gunsou, also known as Sgt. Frog, is a Japanese anime series that follows the comedic adventures of Sergeant Keroro, an alien frog from the planet Keron. Tasked with invading Earth, Keroro instead spends his time engaging in various misadventures and forming unlikely friendships with the Hinata family. The series blends humor with elements of science fiction and has gained a dedicated fanbase for its quirky characters and entertaining storylines.