This was a pleasant watch. Finished it in less than 48hrs. The story was interesting and sort of mysterious. There were quite a few nerve wracking moments. Though i must admit that the 1st 2 eps were legit confusing but get through it and it's an interesting yet smooth journey. I liked the story, the unexpected turns and background stories. Nothing is what it seems. Deserves the good rating. Besides that it is short, engaging and has a good ending. I liked acting of all the important characters. Didn't bother about the osts though, wasn't important but bgm was suitable. The production was done very very well. My 2nd drama of this genre, and now i believe even more that this genre is best among all the modern dramas if done well.