Shin'ichi Ryû

A married woman works as a nurse in high school and has an affair with a fellow teacher. He is infatuated with her and urges the nurse to divorce her husband and be with him, but she has no intention of doing so. They are not the only ones having sex in the school's infirmary, a female student and a female teacher are having an affair as well. When the nurse catches them, she becomes interested in lesbian sex and learns that the student, made her dad, a chairman of the school, pay the teacher a lesbian "allowance". The nurse wants to have it too...