Endo Yumiko is 30 years old. Since her mother died when she was 18, she has been living with her stepfather, who remarried. From the outside, they appear to be a modest father-daughter household, but in reality, they are a married couple. The two have kept their relationship a secret from the public, but today, as the summer ends and the scent of autumn fills the air, they start having sex in the room next to where their uncle Goro, who has come from Tokushima, is sleeping. However, Goro can hear everything they are saying...
