It's the dawn of a new school year for Fuyuki Hinata. As if the stress of starting junior high wasn't enough, he must also deal with Sgt. Keroro, the froglike alien with apocalyptic intentions freeloading in his attic. But if Fuyuki thought the Sergeant was a handful, wait until he gets a load of his subordinates! His gun-crazy subordinates have started to surface and not all of them agree with the way that Keroro's been running the invasion.