Shinhye has always loved Yonghwa. Ever since they grew up as neighbours when they were children. 

And she had hoped that Yonghwa liked her back. 

When they were fifteen Yonghwa left her only leaving a note saying

'Wait for me, I'll come back for you.'

It had been four years, Shinhye is now nineteen.

And she is still waiting. 

But then she meets Lee Minho who until now has only watched Shinhye from the side. 

Maybe now it's time to forget the past and live in the present.