Sumire started dating her childhood friend, but suddenly her father's company went bankrupt. Moreover, her house has just been renovated and there is a large amount of debt left. Her Sumire's father asks Sumire's boyfriend's father, who has been looking at Sumire lewdly from before, for money in exchange for her daughter's service. In addition, my father is trying to start a law-breaking customs as a customer, not just my boyfriend's father. Sumire, who is innocent and pure, gradually wakes up to the pleasure of her service using lotion etc. and she falls into nympho.