The incest love story between brother -in -law and sister -in -law is probably not strange in Japan. Both of them lived in a house, so the possibility of arising feelings is understandable, after many times of craving, the brother -in -law finally blinked the opportunity to express his feelings to the beautiful sister -in -law Tono. Although it was a bit embarrassed, it could not prevent the stealing between the two people at that time. Perhaps after that time, the affection between them became closer and closer, so both of them continued to perform secretive sex times together in hiding people.