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 though the sergeant was a handful, wait until he gets a load of his subordinates! Keroro's gun-crazy cronies have started to surface, and not all of them agree with the way that he's been running the invasion!