Chiharu Amabuki, an apathetic girl who only wishes for a peaceful and uneventful life, has a chaotic daily life thanks to her strange predisposition that causes her to unintentionally engage in s*xual harassment. One day, a girl calling herself her fiancee arrives and they begin living together. From that day on, Chiharu's life begins changing little by little, and Chiharu herself gradually begins changing as well. This is the story of a troubled heroine and the heroine who watches over her.