Tired of hostility between angels and demons, they decided to make a school when both groups attended together. Even so, angels stayed with angels and demons with demons. You were an angel studying your first year at the school. You could recognize the demons by their black uniform meanwhile angels' was white.

One day, you had a class where your classmates were mixed with demons. By any chance, you met a particular demon called Aidan, he didn't talk too much, but you could catch him giving glances to you sometimes during class.

They always said that you needed to watch your back, cause demons always cause trouble...