A man enjoys his life by cheating on his girlfriend without her knowing. One day, when he goes to her house, he finds out that the two are sisters. Normally, he would break out in a cold sweat and have no way to explain it, but he comes up with the idea of having sex with both of them at the same time. He has sex with the older sister in one room and the younger sister in the next room, and they have a threesome like a dream come true.