Hazuki, a 31-year-old full-time housewife. Her husband is busy with work and rarely comes home, so she spends her days in loneliness. Taichi, a 21-year-old college student. He is a promising karate player, but his career as an athlete was cut short by an injury, and he is lost and troubled about his future. The two met by chance. They became increasingly close, and before they knew it, they had a relationship that was more than friends but less than lovers. A perfectly compatible physical relationship, indulging in sex in a detached house while knowing that it is a relationship that will end someday, caught between guilt and pleasure.
