Incest between brother-in-law and sister-in-law is probably no longer strange in Japan. Both of them live in the same house, so the possibility of developing feelings is understandable, after many times of greedy snooping, the brother-in-law finally took the opportunity to express his feelings to his beautiful sister-in-law Tono. Although it was a little embarrassing, it could not prevent the theft between the two of them from happening at that time. Perhaps after that time, the relationship between them has become closer and closer, so the two have continued to have secret relations with each other in hiding from everyone.