what an amazing amazing amazing dramaaaaaaa!!!! basically, it's all about psychopaths, their biology which is to have no emotions and the what if, 'what if they have the emotions', and anything's related, the police, the media and the victims and their families. it's my first time listing reasons instead of doing it in paragraph, cause I have so many things I love about it. so here we go:

what I love:
1. amazingly and nicely and well written SCRIPT. from the first scene to the last one, the script was meticulous and detailed, all parts are important, and even tied up perfectly no plot holes. all i think while i watch this drama, is that this script deserves all the appreciation, awards and loveee.
2. probably the best STORYLINE for a crime thriller drama, it progresses with a nice paced not too fast not too slow, with unexpected twist, put you on the edge of your seat, give you thousands of mixed emotions, it makes you focus to each lines to each scenes. and by the time you feel like it will be draggy, they give you something new, they give you another reason to not get bored. love it!
3. freakinnn amazing ACTING!!!! shttt damn it, give them the best actors actresses awards especially to lee seung gi and lee hee jun. they're crazy, top notch the highest tier acting. they absorbed and brings the best out of their character, the emotions they brought on their eyes ughh... one second you are mad and angry and the next second you're crying with them. you felt their pain, their anger, their love and their guilt... name it, name all of the emotions they serve it, and they serve it well. kudos to lee seung gi, lee hee jun, park ju hyun, kyung soo jin and all others
4. gives you roller coaster of EMOTIONS and mixed of it. as I said in previous point, name all of the emotions you will feel it. and it will play with your emotions like it will even make you question, 'should I feel like this? ' 'shouldn't I feel like this?'
5. i love bong yi x ba reum relationship, cutest and innocent :') actually all of their relationships
6. the bgm though, it just intensifies everything, making it even betterrr, whether it's sad or thrill or some cute scenes yo im in lahv

ps// ep5 amazing asf, prolly my favourite episode

what I kinda dislikes (hence reason why it's not 10)
1. the last 3 to 4 episodes feels a littleee bit hmm draggy? and it wasn't as interesting as the earlier episodes. not saying its boring, it's just less interesting because the earlier episodes put my standards and expectations too high.

one thing to say for disclosure, WATCH IT! if you haven't please do. thank you :)