He meets his son's female homeroom teacher again at a soapland. The two shared secrets and then fell into a creampie affair.

When my son was a student, he met Natsuki, a female teacher whom he kindly gave me advice on about his career path, and we unexpectedly reunite at a soapland. "Please keep quiet about this to your son." The two, excited by the sense of guilt that they share secrets, not only stays inside the store, but also invite them to their homes where their son is away and have sex! Although she tries to cut off the relationship at one point, despite her husband, the female married woman teacher is unable to control her sexual desire, and visits her home again and resumes secret creampie sex.