Both Xiaolian and Xiaomi resembles each other with he exception of attitude. Xiaolian is cautious, smart, calculative, has knowledge of medicine and poison, and also knows martial arts and powers where as Xiaomi knows calligraphy arts, music, literature, and etiquette as a lady. She is innocent, pure, and naive and tends to be the more happy go lucky type of girl.

Why do they look so alike? And since when did they got their fate twisted to change place? When Xiaolian was hunted down by the Demon Prince's people and when Xiaomi was pushed down to Earth by her teacher's fiancee, they both had coincidentally swap places as Xiaomi's teacher rescued Xiaolian without knowing and the demon prince caught Xiaomi by chance. Since then, she was held captive in the demon realm.