Main Char:

Tiffany, Sunny, Wooyoung, Nichkhun

Minor Char:

Jessica, Jay, Yuri, Taecyeon

Tiffany and Wooyoung have been friends ever since they were little. Wooyoung had to move to the States when Tiffany was seven. He promised her that he  would be back next year but never did. Ten years have past and Wooyoung has finally come back. Will Tiffany and Wooyoung remember each other or will they just remain in each others memories?