My friend and I watched this together when it was still ongoing and I still could not forget how we went crazy over every plot twist and the truth slowly revealing itself. Kinda sad how many spoilers it has now on social media platforms.

Because both of us just watched to fill in our boring/free time, we did not care how realistic it would be, nor did we mind the little details. We ended up, however, impatiently waiting for the next update. I would admit that the background story about how psychopaths are created was unrealistic, however, that was what made the plot intriguing. We mainly had our focus on guessing who the actual psychopath was, and that made us go crazy every episode. Of course, we each had someone in mind, but because of how well the actors played their roles well, we kept on getting confused and kept on switching sides. One episode hinted that this character may be it, but another would hint that it was another one. It was a series of us guessing who's what, and a big gasp at the last episode.

Overall, it was a fun ride, both of us had been kept on the edge of our seats in every cliffhanger. If you haven't been spoiled yet, this drama will sure give you a lot of goosebumps.