Jindai High School was a fairly safe place, right up until Sousuke Sagara transferred there. A complete nutcase, he wreaks havoc on the student body and gets into all sorts of trouble with the teachers! But there is more to Sousuke than meets the eye—not just a hell-raising student, he is actually a member of an elite military unit, on an undercover mission to protect the beautiful schoolgirl Kaname Chidori from the KGB.