DASS-720 A female doctor who loses to a colleague she hates and is given an experimental aphrodisiac that turns her entire body into an erogenous zone, causing her to repeatedly orgasm and incontinently. Mary Tachibana

Mary's boyfriend, Shunsuke, is rushed to the hospital where she works. However, a highly complicated surgery is required to save him. They decide to turn to Will, a doctor with a bad reputation but top-notch skills. In exchange for performing the surgery, the doctor offers Mary a bet: if she wins, he'll perform the surgery. The bet is a clinical trial of medical equipment and drugs imported from overseas...