X's body is once possessed by a female gender. So this time, his friends have an important duty to prove and show to the world that he really is a man, but most of the time the method and technique of proving create some misunderstandings, especially to the girl he has a crush on for a long time.

An accident makes Deuan and Ton switch their bodies: Ton from an athletic young man to a gentle, clean and intelligence person and Deuan, a clean, neat and smart person, to a tough and very gutsy person. Their friends begin to suspect about their behavior.