Riko was living a fulfilling life with her fiancé. Shortly after we started dating my ex-boyfriend, a doctor, it became clear that he was no good, and we broke up as if to run away. However, one day, her ex-boyfriend locates their home and breaks into her home. Riko, who was drugged with an aphrodisiac, was unable to maintain her rationality even when her boyfriend returned home and continued to have sex with him endlessly.