Naeun and Kai had a beautiful relationship, they loved each other so much and thought no one or nothing could separate them. But nothing lasts forever, he's leaving her because his family couldn't accept a poor girl like her for their perfect son. After inconclusive love-affair, Naeun seems not to believe in love anymore, always smiles, happies to hide her sadness, bust-up but in deep her heart, she's waiting for him...

Oneday, her family forced her attend a blind date ( son of her father's bestfriend) and she met Taemin in here. Because Taemin already has girlfriend and Naeun cannot forget her first love so a date was so failure, but none of them knows they had a little thing to each other. After one month, Naeun got a job and unexpectedly, Taemin is her boss and this time he fell in love with her, whether he wins her heart or not? What if Kai still loves her? What is her choice?