Sachie Okawa, 52-year-old housewife. A family of four including her eldest son (23), eldest daughter (21), and husband (56). Since her school days, she's felt uncomfortable with romance, never even holding hands with someone she liked. She married her husband through an arranged meeting at her parents' suggestion. Her husband is similarly serious-minded, and she says their relationship has never been painful. Currently, they have sex about once a week. However, Sachie isn't particularly proactive, describing sex with her husband as "not unpleasant, but not especially pleasurable either." Reflecting on her life, she realized, "I don't want to go on like this," and decided to experience her first sex with another man. Seeking new excitement and pleasure, she fully indulges and enjoys herself.