An is married but still serves as the advisor for the soccer club. She is a busty female teacher. One day, a student, Nakajima, comes to An to ask for advice about her future career. Nakajima, who is actually after An's busty breasts, attacks An. Nakajima continues to blackmail An and have a relationship with her. One day, her husband finds out about this, but... He can't tell his wife and spends his days in agony.