Chihiro Shinkawa, a 50-year-old housewife and mother of two. Standing 175 cm tall, she boasts a model-like slender figure and still radiates a strikingly sexy allure. She got married 15 years ago at age 35 through an arranged marriage. Since it was nearly the last chance to have children, she quickly agreed to the match. However, with arranged marriages, there was almost no opportunity to learn about intimacy beforehand. Understandably so—after marriage, she was consumed by the pressure of childbirth, and her relationship with her husband remained distant. Now, she strongly desires to "let loose and fully release her pent-up desires." She's eager to enjoy passionate sex and wants to be vigorously taken by a man. To fulfill this longing, she's decided to create a special night just for herself.