Due to the carelessness of the janitor Hanaoka, a female teacher, Nana, is splashed with water. At that moment, the desires of the men in the classroom are ignited. Nana's erotic body is visible through her underwear and skin. A lustful student rapes Nana after school. When Hanaoka finds out, he tries to protect Nana, but is knocked down and a life of further rape begins. However, Hanaoka's true nature is soon revealed...