Six years ago, Kasumi's mother remarried and Yoshio became her stepfather. Kasumi left home soon after her mother remarried, so her relationship with Yoshio was awkward. Meanwhile, Yoshio had always thought of Kasumi as a woman since the remarriage, and even now that Kasumi is someone else's wife, he has not been able to let go of his evil feelings for her. And then the incident happened. Yoshio, who was aroused by Kasumi during her visit home, embraced her from behind, whispered in her ear, "You've become an even more beautiful woman"... and then pushed her down.