At school, they interact as teacher and student, but after school, they become man and woman... Fumiko, a female teacher, and Taki, a student, enjoy a secret relationship. However, recently, Taki, who is in the midst of puberty and has limitless sexual Kokoro, has begun to seek further excitement and relationships even within school. In a corner of the classroom. In the bathroom. In the staff room. A love affair in a dangerous situation. If it is discovered, it will all be over. But the more she thinks that, the wetter she gets. Feeling a sense of immorality, Fumiko was unable to refuse her student's rampage.