I think this drama is underrated, because I totally enjoyed watching it and it's well-made. The story was very interesting and the acting was very good.
The very first minutes of the first episode were weird - something was not right with the production, but everything later is really good. The chemistry between leads is exploding here. Good directing. A really good choice of actors. Of course it is only my opinion, but I really enjoy watching this drama.
I enjoy this drama a lot: the story is interesting, the actors are doing very well, not only lead but also supporting. The music is very suitable for the scenes.