So as I was scrolling through the review section I saw much stuff I don't quite agree with.
1. The killer was easy to guess. I don't know if I am just stupid or if you are a genius, but I feel like they made the storyline to surprise us with another plot twist. Yeah, the doctor seemed suspicious but I could never predict the other person in the story.
2. The ML has weak acting skills, he was overreacting way too much.- Well I am not sure what scene are you thinking about but I did not feel uncomfortable watching him act or I never saw him overreacting. Ofc almost the same things were spread about the FL but there were comments like she was annoying and everyone can have their own opinion on this matter.

But when we want to talk about the drama without comments from others and only my honest opinion I will say that it had good chemistry between the main characters, good character development, and an impressive ending. I went into this thinking that it would be a normal serial killer thing but after 3rd episode when I was scrolling through reviews I saw the words "parallel universe" which kind of scared me and I was expecting myself to get bored after one more episode. But as you can see I finished it with good ratings.