Miku deeply cares for her father-in-law and diligently tends to him every day. Despite her beautiful body, she has long been neglected by her husband. To ease her loneliness, she often buys clothes for her father-in-law at the department store where she works. One day, as he attempts to urinate, he suddenly loses control and involuntarily wets himself. Embarrassed, perhaps due to old age, Miku gently wipes his penis with tenderness. Then, she begins carefully licking it. Frustrated and starved for affection, the daughter-in-law grows increasingly aroused by her elderly father-in-law's body. Witnessing her actions, he gradually rediscovers the long-dormant desires of an aging man.