Tsubaki agreed to live in a two-family home with her senile father-in-law. However, it was all a plot by her father-in-law... an act to get her. "Sachiyo, how about it after a long time?" She sympathizes with him, knowing that he will touch her breasts when she cannot refuse him, but... Her father-in-law's courtship behavior escalates. Tsubaki resists, but it is too late and he rapes her. Frustrated by the lack of sex with her husband, Tsubaki's body gradually begins to crave her father-in-law, and although she feels guilty, she falls for his big-dick sex...