A few years after getting married, her life with her husband has become monotonous. Midori's only joy is chatting with Yukako, the wife of the Sato family who lives next door. Today, as she heads to the Sato family's house with some fruit delivered from her parents' house in hand, she hears Yukako's voice from the garden... "Why do you soil your underwear every single day?" It seems that Yukako is scolding her son Kota, who had a wet dream. Midori's heart swells as she imagines Kota, who is of age but still unable to satisfy his sexual desires. The next day, she has a chance to be alone with Kota, but...