An uncensored sex movie of Ryu Enami when her husband was away from home was the reason why young wives were severely lacking in affection and masturbation was one of the solutions that could temporarily solve this problem. However, masturbation had to be done in a private place, not just anywhere. Like Enami, because she could not bear it any longer and did not foresee the consequences, she masturbated naked in the living room while her husband’s younger brother came to visit. As a result, he accidentally discovered her, could not control himself in front of his sister-in-law’s smooth white body and committed incest with her. Although she felt wrong and guilty towards her husband, Enami felt very happy and satisfied her desire compared to having to do it herself, so she allowed herself to be easy just this once.