Juri has been raising her son desperately, wanting him to follow the same path as her elite husband. However, despite her enthusiasm, her son's grades are lackluster, and the stress and frustration of a sexless marriage gradually builds up... One day, she notices her son's friend, Tatsuya, groping her while she sleeps... "He needs to be punished..." Juri says angrily, but begins to stroke his cock. With her rationality gone, Juri can only think about sex, and stroking alone isn't enough...