Okay now lets rewind back to 3 years ago.

L and Krystal was a couple whereby everyone in Seoul high school was jealous. 

They were like CC. 

Till one day...................

L ask her for a break up and did not give her a specific reason for breaking up and left her hanging there. 

The next day, he never return...

He shut down all his SNS and was uncontactable. 

Krystal eventually shut herself down and there was endless crying till her parents manage to comfort her back.

She use all sorts of way to find her only myungsoo back, but no one knew where he was or what he was doing. 

All this years, her heart still ache when memory floated up in her mind.