Even if my son is at home, my mother-in-law, Yu, who repeats obscene sex with his father from daytime. That was enough to make her ronin student Yasuhiko erect. As all of these things pile up, Yasuhiko comes to think of Yuu as a "woman." Sensing this, Yu, who has a strong libido, accepts her son-in-law, and finally the two... Since then, her son began to seek her mother's body even though his father was at home, and they were confused from the morning.
