Nothing lasts forever

Jiyeon and Kai have been dating for a while now. Exactly six months. It was a beautiful summer love. Their relationship went on during autumn. But nothing lasts forever.Kai started to get annoyed by Jiyeon and often tell her that. He was selfish and only cared about himself. He often flirted with other girls just to hurt Jiyeon. But still, she was always there when he needed her.Everything got even worse when a new girl transferred- on their six months anniversary. Her name was Hyomin. Park Hyomin. Jiyeon´s step sister. She was a somebody who suddenly appeared in Jiyeon´s life.Kai was enchanted by her. He started to flirt with her and then date her, but still didn´t break up with Jiyeon.After few week, she had enough and left. She left everything- her friends, family and... Kai.Because she was one of the top students, she took chance and transferred to the school in the US, leaving everything behind.Right after she left, Kai realized, how much he love her. How much he need her to live on. But it was already late.What if Jiyeon comes back after two years to graduate with her friends? What if she comes back, but it isn´t her anymore? She is not smiling anymore.Will Kai be successful and get her back by his side? Can he make her smile return? But most important, Will he take a second chance, or he will stay selfish and lose her again, and this time for forever.....