The relationship between the leads is just the most heart-warming and sweet and tender romance i have ever seen. and kudos to Park Hae Jin who plays "Sunbae" (lol), his character is above all the best part of this show. He is the most interesting charcater, and this show does something so unique by allowing us as the viewer to see from the female leads perspective, meaning, you yourself, like her, will question him and his intentions. The show plays out so well, and paces itself so perfectly that every episode seems too short (which is super rare). It holds all its cards and reveals them to you only when time is right (again, super rare trait), and EVERYTHING YOU BELIEVE YOU KNOW IS NOT ALWAYS ALL THERE IS TO THE STORY. Watch it for yourself, and you will quickly see that this is a gem among many other dramas. Yes, ill be the first to say (while i would not have predicted this when watching the series in the beginning) it was imperfect (but really, only in the last few episodes), HOWEVER, as i am the first to drop a show as soon as i think ill be disappointed with the end, I can say that I don't regret watching this show at all and that's primarily because of how strong the series as a whole was.