A widowed stepmother named Shiori Tsukada lives harmoniously with her husband Tomifumi and his daughter Sakiho in their three-person household. One weekend when Sakiho goes out to attend a friend's wedding, Tomifumi confesses that he has been secretly attracted to Shiori since they first met due to her resemblance to his first love. Despite initially resisting Tomifumi's advances, Shiori eventually gives in to his desires... *The contents may vary depending on the distribution method.