I just finished this drama, so here comes my review right after:

Story: The beginning was really intense and I felt really hooked to keep watching it. Although later on it had some episodes which in my opinion weren't necessary because they only made some moments longer and actually quite boring. I really had trouble to motivate myself to keep watching it which is quite sad and a bit disappointing because the start was so strong. Towards the end it got better again.

Acting/Cast: I like the cast, they are all very unique charaters with their ups and downs. The introduction was very nice, also the introduction of the culprit was very strong and I actually like the character a lot.

Music: The Music was okay, some parts were really well underlined with a soundtrack, I especially liked the piano parts, I will have to look up the song later xD

Rewatch Value: As I mentioned before - the story got a bit loooong and slow and I almost couldn't bring myself to finish the drama, so I probably wouldn't watch it again.

Overall: Overall I liked the drama despise my own opinions above. It's a nice drama to watch on the side and not too complicated to understand.