You and Kai were enemies since childhood. He keeps on bullying and making fun of you Infront of everyone. He was popular while you were loner. One day, you totally forgot to do his important homework and was nervous that he'll kill you.

The next day, you got into a car accident and pretended that you lost your memory so he wouldn't kill you. But... He lied and told you that he was your fiance. You weren't expecting this...