God the comments here some or them are so immature and juvenile "she's too hyper!" "she's too mature near the end!" "I love the stalker narcissist mean girl borderline rapist of the male lead that is park si yeon in this drama and I hate everyone else look at me!" "this drama is not dragged on and full of fillers and horrioble pacing like ___ which means it's cliche" right because this drama was fresh for its time and got to the point, people have no taste istg.
@homaKP that's not how it works, people move on from old loves all the time, not everything in life is black and white. The point of the drama is that these two were soulmates because they truly loved each other, and thus fate them them be together. His narcissist girlfriend was never "the one", grow up and stop acting like a person should be with their first love forever or every love they have means nothing.