After getting involved in a car accident, Byun Baekhyun lost his memories. It's already a year and nothing changed, and doctor said 5 months later he won't remember anything. Doing her best as his wife, Joo Yeo-sin bring him into their old high school to make him remember about their past. Will it works for Baekhyun?

Ji eun is a girl who doesn't like get close to boys because of some personal reasons.  In other word, boys at her school irritating and annoying especially the kingkas at her school, EXO so it just add the point why she can't gets close to boys. But somehow she get close to EXO. It just took one night. One night that make her life changes.