Basically, it's like as the saying goes, FIRST LOVE NEVER DIES. I think it shares about a girl who had many relationships and that they always fail in the end no matter how good it started. Then she remembers her first love, and after a long time, she realizes that long ago she have found her true love. Now she wants him back but does not know where he is now. Or what happened to him. Then by chance she sees him. And the rest is history.