It has been 10 years since she was dumped by Hideo, a teacher she used to date. Ayami, unable to forget Hideo after his one-sided breakup back then, approaches and marries his son—whom she doesnot even love—just to reunite with him. Time passes, and upon reuniting as father-in-law and daughter-in-law, Ayami feels the warmth of the teacher she has missed so much. Neglecting her husband, she seduces her father-in-law every night and sleeps with him.