Chitose used to come to her best friend, her mother, to complain about her cheating husband. But today was different. Her mother has gone to work part time, leaving Kouta and Chitose alone. Kota is shy and gets nervous especially around women. At times like this, she remembers the story about the Chitose couple's ``sexless'' relationship, which she usually ignores, and becomes even more conscious of Chitose than usual. She suddenly hears about Chitose's love story with Kouta. Kota talks to her about his troubles in love in a boring manner, but then Chitose decides to teach him a personal sex ed lesson. Detail sex acts include breast massaging, pussy teasing, titfuck, cowgirl, doggystyle, masturbation, and missionary.