Science and Technology are truly miraculous things - except when in the hands of a super-genius super-jerk like the Keroro Platoon's recently recovered tactical officer, Sergeant Major Kururu. Already, Kururu is developing biochemical weapons that no Earth medicine can combat, and rays that can turn the entire planet into helpless children! But where can a fugitive alien find test subjects for such diabolical weapons? Where indeed...but the Hinata household!