Two months have passed since her husband lost his job, and he still hasn't found new work. His wife, Rina, watches over him with warmth and care. However, there's one thing she can no longer tolerate—since his unemployment, he's lost his usual erection, leaving them in a sexless marriage. Rina's libido is abnormally strong, and she grows increasingly frustrated with her husband's passivity. One day, while cleaning her father-in-law's groin with a towel during caregiving, she's shocked to see his penis erecting powerfully, far beyond what she'd expect for his age. The atmosphere shifts instantly—there's no turning back as the lustful daughter-in-law and well-endowed father-in-law edge closer to forbidden intimacy.