Mari is a high school teacher who is earnest and somewhat cold. Tired of her monotonous days, she discovered a secret game: wandering around Roppongi at night and seducing men. She enjoys the pleasure of lewd acts with strangers and finds temporary peace. Her student Toshihiko, who happens to witness her nighttime appearance, is captivated by Mari's seductive figure before he knows it...

When she takes off her teacher clothes, her womanhood breaks... Satoko, a new teacher, is frightened by the hungry gazes of frustrated male students, and is bullied every day by delinquent students such as Hinata Masaaki. Unable to resist, she just lets things happen, and her only emotional solace is through computer communications. As she becomes addicted to lewd sex with the people she is communicating with, a shocking event befalls her...

The film depicts the relationship between a beautiful teacher and a male teacher, popular among female students, an excellent student who tells the teacher about his feelings using an answering machine, and a high school student who bets on whether she can have a relationship with a male teacher. This is the debut full-length work by Hideo Nakata.