Maki, who has been feeling sexually frustrated due to a lack of intimacy with her husband lately, finds her pent-up sexual desire leading her to desire her father-in-law, with whom she lives. She begins to provocatively engage with him regularly, intentionally showing her cleavage while helping him change clothes or thrusting her hips out to reveal her underwear. Her father-in-law, too, gradually becomes aroused, and they find themselves in a mutual pursuit of each other.
