Shota, who is receiving extra lessons from his homeroom teacher Mr. Kimijima in the school library, can't stop thinking about his teacher's breasts. As he plays pranks on her using every trick in the book, things escalate all the way to sex! Even the health teacher, Mr. Tsujii, who happens to witness the scene, is bewildered! This incident sets off a chain of events where Shota ends up monopolizing the two famous busty teachers at the school. He gets to see their breasts and vaginas in the nurse's office, makes them jump rope naked in the principal's office, completely crossing the line from mere pranks! In the end, he even experiences double paizuri, blowjobs, and a threesome!
