After hearing a lot of hype for this, I decided to check it out. First 4 episodes are fantastic, high tempo thriller that keeps the tension, two great leads and great cast in general. OST really stuck in my mind as well. Then I think drama tried to do way too much. There is way too many plot twists and turns to the story that it overcomplicates storylines for no reason and draws attentions away from the main plot. The romance between the leads has both ups and downs for me. The chemistry is there, but significant age difference really bothered me sometimes, maybe because the female lead has a baby face and looks even younger age than she actually is. Also when it comes to romance, the writers sometimes write it very childlishly as if teens were falling in love and not two adults, when the romance is shown in a mature way that's where it shines.
The finale doesnt stick the landing. It feels as if the show run out of stream and they still needed one more episode.
Overall its a fun watch, but nothing more.