Mihi Takei, 30 years old, a full-time housewife. Before marriage, she worked as an office lady, but retired upon marrying her husband whom she met at work, and four years have passed since then. Currently, she lives happily with her husband and their 3-year-old son, enjoying a comfortable and fulfilling family life. She has sex with her husband two to three times a week—compared to their pre-marriage days when they had sex daily, she now describes their current sex life as "stale" and routine. Has their intimate relationship simply reached a stable, perfected form? On the other hand, Mihi expresses a desire for "unexpected, intense sex," indicating her craving for novelty and excitement in their bedroom. Her attitude reveals a surprisingly aggressive sexual appetite—so bold that she herself admits, "You’re the last person I’d expect to say this!"