Sakiko (37) is a married woman in her fifth year of marriage. A late-blooming housewife who used to work as a receptionist and attended an all-girls school, her first love was during college—a pure and innocent romance. She quit her job to become a full-time homemaker, dedicating herself to her domineering husband. However, after three years without conceiving a child, signs of his infidelity began to appear, leading to a sexless marriage. Overcome by anxiety and despair, she escapes on a trip to avoid reality. At an outdoor hot spring, she's approached by a man; when he touches her body, she becomes so wet that moisture drips from her genitals. As she takes his cock inside her, white fluids stream down her buttocks while she trembles in pleasure. In the cowgirl position, she rides him vigorously, completely absorbed in the pursuit of ecstasy.