A young and beautiful female teacher starts working in an all boys high school.

A sincere and hardworking student joins the Chaos Class, but acceptance seems unlikely when he becomes the target of their pranks.

Lazy, uneducated students mostly coming from money, share a very close band. They live together in the dormitory of this private highschool, where they daily plan their latest pranks on teachers or the other classes. When a new and obviously strict headmaster arrives, the students naturally try to overthrow him. A comic war of nitwits follows.