Horny mature woman Kaoru Takeki feels so much from her anal that she has three orgasms! Married for 25 years, Kaoru is frustrated by her husband's absence from his job. One day, she accidentally overhears her son Shingo's friend Tsuyoshi talking about something. "Anal sex is really amazing!!" The moment she heard the words, Kaoru felt an electric current run through her anal. She then lets Shingo go out and asks Tsuyoshi to fuck her anally, but...