Yukari, a mother who was addicted to the relationship between her son and his body. - The son tries to break off the relationship because it doesn't go well as it is, but the son, who is not satisfied with it, attacks Yukari and forces her to have sex with him. - Yukari refuses, but she realizes that the more she rejects her son, the more intense his caress becomes, and the more pleasurable it becomes. - Even the son who is good at heart senses this, and a fierce caressing battle unfolds between mother and son, refusing to acknowledge that each other feels good.