Missing her husband's touch, the insatiable Ayako Yaginuma decides to seek out independent counseling for help. However, the housewife gets lost before her appointment and ends up meeting professor Hayao Nuregashira, a researcher of sexual activity and behavior. He mistakes Ayako for an experiment participant and subjects her to a series of erotic tests, soon finding out just how lustful she really is.
Impressed by her limitless libido and appeal, the professor appoints Ayako as head researcher of various sexual topics. With the carnal satisfaction she desires now available at every turn, Ayako eagerly carries out her new tasks. But unbeknownst to her, this new job may lead to something worth more than mere sexual appeasement.