My stepmother is Kozue, my father's new wife. My father is having sex with my stepmother without knowing anything about it. However, my stepmother and I have a secret. That is, Kozue is my obedient pet... Soon after my remarriage, I had a relationship with Kozue. From that moment on, she couldn't resist me... If my father found out about this relationship, our family would fall apart... That excitement brought a new excitement...