The only thing I have to say is that this is such an underrated show. Each character is different and complicated (even the secondary ones) and the writers and directors still managed to put them together. I loved the interconnectedness of the characters' stories even though they had nothing to do one with the other.
Actually, this is my first review in a long time because I find it really strange that this drama isn't more popular. It's very refreshing to watch something like this after the crazy amount of romantic series I've consumed.