A sex toy for our new father and sisters.

Himari, the honor student, and Hinako, the younger sister who couldn't fit in with school and was refusing to school. The two lived in peace with their mother, their new wife, their wealthy stepfather. However, while her mother is hospitalized for childbirth, the house is in a rotten, lustful space ruled by her father-in-law... Hinako's inferiority complex is used to cleverly take advantage of her words and creampies her. They take advantage of Himari's kindness, who cares about her younger sister, and have sex... Before they know it, the two have become sex slaves who compete for their father-in-law's dick and compete for service. My mind and body are dominated to the point where I'm happy to know who will get pregnant first...