Mari, who is troubled by a sexless marriage with her husband, is depressed because she feels she is not attractive, and her father-in-law suggests that she seduce him by wearing bold underwear. Her father-in-law, who is aroused by the sight of Mari in her underwear, keeps asking her, "Please... let me put it in for just one minute," and she finally gives in and allows him to insert it for just one minute. Even in just one short minute, her reason and pleasure are at odds with the pleasure of her father-in-law's insatiable cock, which is beyond her years, and his hard thrusts, and even after more than a minute has passed, her hips continue to move on their own, leading to a relationship where she continues to insert it. In the end, she pushes her father-in-law down and shakes her hips, climaxing, ignoring her husband in the next room, saying, "I want your cock, father-in-law..."