Meet The Sergeant!

We are introduced to Keroro, an eccentric and blundering alien who came to destroy and conquer Earth, and is living as a slave under the roof of the Hinatas, a perfectly normal family who had lived a perfectly normal life: The mother, Aki, is an extremely busy and beautiful manga editor who rarely spends time with her teenage children; Fuyuki is the gentle-hearted and paranormal-loving son and Natsumi is the sweet but hot-tempered daughter with extremely great athletic skills, and who despises Keroro, while Fuyuki is intensely interested about him. After a few weeks of living with the Hinatas, Keroro gets his own room that is rumoured to be haunted by a ghost! However, the turn-out of the room is a big surprise for the Hinatas later on.