Two people who were born as older brothers and sisters. An older brother who has a reputation as a "caring brother", but in fact he loves his sister Momojiri, and he was trying to make his sister like herself and make her a distorted desire. .. However, the younger sister began to understand that the act of siblings was a bad thing, and the older brother who felt it began to want the forbidden honey of incest. When the younger sister who was restrained in gym clothes was photographed thoroughly to the peach butt and the secret part, the butt meat that protruded from the pants due to overgrowth was caressed and made a handsome stain, and while devouring each other's lips, the older brother's meat stick I will accept it.