As I never read the webtoon version, so I don't have things to compare between the two. I'd say this is one of the best drama for 2020. I was expecting this for its visual alone that I was skeptical if they could make good special effect for the monsters. And I could say that everything wrapped up great. From the acting, the story, and obviously the visual. That I hooked up from the very first episode and ended up finished it in one sitting.

From the start, I was awed by how realistic and disturbing the monsters are. Though to be frank, it was more disturbing than I've imagined and I got goosebumps nearly in every monsters scenes but that shows how good and realistic the visual are. I forgot the feeling of watching SAW series and this reminds me a lot of it. So, if anyone that are sensitive, I would not recommend this. Too much trigger warnings. But if you think you could bear it, then the story alone is interesting and makes me wondering which one would die first as more twist keep coming in. I bawled my eyes a lot for the last few episodes and I'm not complaining at all. Maybe some of the BGM that I think wasn't give so much impact to the scenes shown.

No matter how good the visual is, if it's not supported by good acting, it'd be a failure after all. But everyone including the minor roles, as for me, are perfectly conveyed the emotions and tensions throughout the episodes. I could sympathize with their anger, frustration, laughter, sweet moments, sadness and pain. And I didn't expect this to come from this kind of series.

Hence, this is one of the best physiological thriller drama I've ever watched but honestly, I don't think I'd able to rewatch this since I'll probably get too sensitive if I watch this kind of scenes too much. BUT it's definitely a worth to watch drama for once in a lifetime and I highly recommend it for those who are into psychological thriller and don't mind any gore scenes to show up.