Tsubaki, a mother who boasts beautiful legs, and her son, Yusuke, have had a relationship with each other even though they are parents and children. The relationship between the two was hidden from his father and brother Mamoru, and was a secret only for them. However, because she loved her mother's legs, Yusuke gradually began to boldly seek her mother's body, and it was only a matter of time before she got caught. And finally, the relationship between the two was found in Mamoru ...