DASS-163 Stepfather and wife's biological child

Sumire starts dating her childhood friend, but suddenly her father's company goes bankrupt. Moreover, their newly renovated house is deeply in debt. Sumire's father asks her boyfriend's father, who has looked at Sumire with lewd eyes, to exchange money for his daughter's services. Additionally, my father is trying to start a custom violating the law as a client, not just my boyfriend's father. Sumire, who is naive and innocent, gradually awakens to the pleasure of serving with skin cream, etc., and falls into a state of nymphomania.