1. Story

a. Characters
I hate everyone. They all had such awful personalities or were completely stupid. The mc himself was completely stupid. If you're that creeped out of the residents, move out. idc how inexpensive that place is. Safety>>. Plus, the place was going to be redeveloped in 6 mos anyway so he was bound to move out and his pay just isn't enough.

On the otherhand, I hated his girlfriend too. Not once did she listen to him or even entertained his worries. I get it she's stressed too, but she said he should learn to defend himself so people wouldn't step on him, but she's the exact same—she always just let her boss bully her. Aside from that she can just rant about her life to him too? What is the effing point of being in a relationship when you cannot even rely on each other. L girlfriend. I hated her more than her boss and the MC's nerdy co-worker and boss.

Speaking of which, I was just waiting for them to die. Too bad it was just the ceo. Well at least the nerd got what was coming to him. I'm not an advocate for violence but don't bully people if you cannot handle the consequences.

b. Plot
As I said it made no sense for him to stay. If you feel that unsafe that it was making you crazy, leave. It wasn't like he absolutely did not have money. I'd so go back home if I can't stay at Seoul. There's no point in trying to make a living if I'm dead. It's just so stupid.

And I'm just not convinced by the scarriness of the antagonists nor their capacity to drive him to insanity. They weren't scary nor really good at their jobs really. They're sloppy. We're just told through the narrative or through camera work how scary they are. Like he killed them all so easily at the end even when they were so cocky.

2. Acting
It was solid. They were believeable except for their scarriness and all.

3. Overall
Expected ending and tbh boring. They could have expanded it more, could have shown us how deadly, capable, brutal and without empathy the antagonists really are but no.

I don't get whose minds were being blown at the ending. Unless you're a five year-old who has never seen a movie then it was pretty much spelled out that he would go insane and murder someone at least. He wasn't going to go out sane in any situation. Idc how that's rare in kdrama. There were literally no other options with how they set it up so no it was not u expected, not mindblowing and certainly not a masterpiece. They could have done more with the promise and could have actually made it terrifying and actually made the viewers question morality and sanity of humans.