DSOD-052 Sinking into the sex industry to pay off her boyfriend's debts... A voluptuous, busty girlfriend trained in "pussy-fucking" to serve as a human sex toy exclusively for older men. Nami Nanami.

Nami is a girlfriend who can't bring herself to abandon her boyfriend—a deadbeat, yet a pitiful figure—and wants to help him resolve his debt. One day, she discovers and decides to use a service that handles debt repayment on behalf of others. As the price for clearing the debt, she is assigned a specific job and must undergo various training sessions to complete it.