A pure girlfriend, driven to depravity by an older man while trying to pay off her debts, strips into a French-style prostitution ring. (Kuramoto Sumire, DASS-163)

Sumire, who has just started dating her childhood sweetheart, faces the sudden bankruptcy of her father's company. Furthermore, their home has just undergone renovations, leaving a large outstanding loan. Sumire's father, who has always viewed her boyfriend with disdain, demands money in exchange for her services. Even worse, he plans to target middle-aged men in the neighborhood as clients, establishing an illegal sex industry. The innocent Sumire is gradually lured into the pleasure derived from using lubricants and other methods of service, falling into a life of debauchery.