Kamen Reijou no Fukushuu Konyaku

One day, Kaoruko's lover betrays her and gets engaged to a notorious young lady, Momo. Kaoruko and Momo fall off the balcony after a fight! When Kaoruko wakes up, the two have switched places.. Kaoruko has become a villainous daughter, and her revenge against her traitorous boyfriend now begins!