Riho moves to the countryside with her husband who has been transferred. Everything about her life has changed... "I want to do something," she says, and starts working part-time at a convenience store during the day. There, she meets a male student, and through work, the distance between them grows closer. Then, one day, the male student makes an unexpected confession. He approaches Riho, who is confused, and Riho, overcome by his youth, ends up having a physical relationship. Her body has been sexless for a while, but the young cock, horny at the peak of its lust, makes her cum over and over again. The more she thinks it's wrong, the more pleasure she feels, and her days are filled with the passion of an adulterous affair that leads her to fall into a swamp of immorality and creampie sex...