This drama was SUCH a good first watch. I wish I could go back and watch it again for the first time! Wow I love it! Honestly the acting was really good. It has many different twists and turns or unexpected outcomes. Yes the acting is good but the OST are amazing.<3 I love nightmare the most. It plays at the end of a lot of the later episodes so you will hear it if you stay a little bit longer! Interesting plot that doesn't bore me (someone with a low attention span). The plot is complex. It has a little something for everyone (love story, angst, DRAMA, action, crime, mystery, AND MORE) but this is really great show. highly recommend.