Cho Ailee (you) don't have a boyfriend since birth because of your overprotective bestfriend, Kim Myungsoo. You've known each other since diapers because your parents and his parents are close friends. You have a cush on him since the first time you met him. You don't dare to confess your feelings because you're afraid that he'll reject you.

Before the valntines day, your best friend Kim Myungsoo went to you and asked a favor from you which broke your heart into million pieces. He asked you to help him confess to your best friend.

Will you do it?

One day... your parents and myungsoo's parents called you both because you will be married. It's an arranged marriage.

Will you accept it?

Will you have a happy ending?