Husbands working away from home are the reason why young wives are severely emotionally deprived and masturbation is one of the measures that can solve this problem temporarily. However, masturbation also has to find a discreet place, not everywhere can be arbitrary. Like Enami, because she couldn't take it anymore and didn't anticipate the consequences, she masturbated naked in the living room while her husband's brother came to play. As a result, he was accidentally discovered, unable to restrain himself in front of his sister-in-law's white body and incest with her. Although she feels wrong and guilty for her husband, Enami feels very happy and satisfies her desires somewhat compared to having to do it herself, so she allows herself to be permissive only once.