This is my favourite K-Drama so far I loved it. The writer and director are amazing. Each episode has its own plot and the story doesn't drag. You would think because there are 20 episodes that are a hour long that it will drag on but it doesn't. It was beautifully done, the production as well. The actors are amazing and really pull you in, all you want to do is jump into the phone. I loved it, I had no problems with it. Thank you. :)