This drama is "the masterpiece" of this year. I happened to stumble upon this drama through an Instagram page that revealed a major spoiler. So, yes I had known the ending but still decided to give it a go and boy, I'm not disappointed at all. Despite of me knowing what exactly was gonna happen, I was moved to tears during plenty of scenes. It has the right amount of episodes and everything was conveyed clearly with no loose ends. The cast did a brilliant job. Kudos to the writers for this excellent script. This is a must watch for all the k-drama lovers out there!