Azumi was content living in a happy household, but she began to crave more intense stimulation in her nightly life with her husband. However, she lacked the courage to voice this desire and instead spent her days indulging in self-pleasure out of frustration. One day, her cohabiting brother-in-law, Koji, caught her in the act of masturbation. Koji blackmailed Azumi into becoming his sex slave. Noticing Azumi's supple body, Koji began to insistently demand that she use her flexible physique for various acts. Azumi, unable to find such pleasure with her husband, found her body increasingly responding… Thus began the days of forbidden debauchery.
