Do Eunmi was lonely and empty until one day, a transfer student named Lu Han entered her life and made her broken heart flutter.

"Never fall in love with a broken heart. It's still in pieces and some of them belong to someone else, so you won't have it completely. You're only going to hurt yourself, so please, trust me when I say that you won't want to fall in love with a girl like me."

"but... I already did."