Married to a beloved man three months ago ... Yuko was supposed to be at the height of happiness. However, the happy newlyweds I had envisioned were hellish days. "That day" ... Yuko's life gear went crazy from "that day" when she accepted her cohabitation with her mother-in-law, Eriko, at the request of her husband. Abuse, sarcasm, and escalating sexual harassment ... Yuko was frustrated by the uncertain living together. One day, Eriko begins to act out of the ordinary with Yuko ...