Sumire starts dating her childhood friend, but suddenly her father's company goes bankrupt. Moreover, the newly renovated house is burdened with debts. 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 an illegal custom as a customer, not just my boyfriend's father. Sumire, who is naive and innocent, gradually awakens to the pleasure of being served with skin cream, etc., and falls into a state of nymphomania.