With their lives now stable, the Shiina couple have moved to a larger apartment than their previous one. Just as they were about to start getting along well with their neighbors, the wife, Yuna, is noticed by the housewives living in the same apartment building who notice the friendly relationship between the couple. They start making snide remarks as they pass each other, and gradually they start to suffer more and more severe harassment. Feeling that she has reached her limit, Yuna becomes glued to a revenge site she stumbles upon by chance. In order to seduces the husband of the woman she hates, Yuna approaches the neighbors with the smile of a "wicked woman"...