The excellent student sister, Himari, and her younger sister Hinako, who struggles to fit in at school and has become a school refuser. The two live peacefully with their mother and her remarried husband, a wealthy stepfather. However, while their mother is hospitalized for childbirth, the home turns into a rotten space of lust controlled by the stepfather… He cunningly takes advantage of Hinako's inferiority complex to have intercourse inside her. He exploits Himari's kindness towards her sister to have sex… Before they know it, the two are fighting over the stepfather's dick and competing in servitude as sex slaves●. They delight in which one will get pregnant first, being impregnated to the point where their minds and bodies are controlled…
