Seven years into her marriage, Yui had nearly forgotten what it meant to be a woman in love. One day, at a bar, she met a masseur who offered her a free session. Unbeknownst to her, it was an illegal parlor using aphrodisiac oils to addict women to drug-induced pleasure. Overwhelmed by the intense sensations, Yui experienced back-arching orgasms and soon became addicted. While her husband was away, she repeatedly returned for the aphrodisiac massages, transforming into a beautiful married woman indulging in illicit creampie affairs.