I am in the "How can people rate this so low" crowd. This was definitely one of the best Korean drama's I've seen all year!
I will agree with some who say the last few episodes weren't so compelling. But overall, this is very well executed. The cinematography, acting, original premise, I was able get into it like a tailor made sleeve.
I love the soundtrack with the 8 bit stuff and how the protagonist (but is she?) mixes old tech with new tech at her home and office. Because honestly, new tech isn't always better than what came before. That also aligns with her mental condition; people with Asperger Syndrome tend to not care what others think. Read this again to understand why she does what she does and doesn't.
Some reviewers don't understand her actions or the "stupidity" of Kim Sun, and think her mental condition is falsely portrayed. Remember that she has never known real love before, on top of her mental condition. The antagonist is truly creepy, and yes, his background is somewhat vague, but I find that it adds to his condition. They also explore nature vs nurture here, so I don't think you can say they don't try to find reasons for his sick mind. And honestly, I didn't really care that much about his origins. Some people just are this way.
Another reason why I think this score is so low/polarized is that a lot of Koreans and perhaps people from other conservative cultures rated this and simply found it to be too explicit. Seriously, people rated this a 1 to 3? That seems like a knee-jerk emotional reaction from people who aren't used to thrillers like this. So perhaps this one is a hit more for western viewers? Just a theory.
