At first, I was hesitant to watch this as I thought this would be cringy even though I thought the trailer was amazing...
However I was wrong, this show is amazing. It may be a bit graphic to some people however it really adds to the story and makes the story to not feel "kid like". Each episode feels like a way of telling us secretly who could've killed Ok Chang-Mi. However it also tricks us with who it might be since there's a lot of people Ok Chang-Mi Investigates. I think that it is important for a thriller show to not easily tell us who it is by the first episode or counting episode, showing us clues and even tricking us can really put us into our seats and just wonder, who is the killer... Each episode unveils more information but in a low-key way for us to figure out and make a our own hypothesis on who it could be.
I think this a rating of 9 really fits this drama. Of course it can't be a 10 since every drama has something a watcher may not like or were feeling iffy about.
There's not much I can say about the music as I don't remember none except one that I like that they always put in the background or at the ending.
Overall this was well done and I definitely recommend to watch. Another fun note, I feel like Disney is getting darker and darker with their shows, and I love it.