this is probably the best acting from PSH, but that says nothing because she can't act, even here I could sense her typical whimpering crybaby surfacing, and she talked in a faked aegyo. YAI is not any better, he's over reactive.

it was highly unrealistic how a trained cop died in 2mins but a nonathletic girl who only mountain claimed and a gamer dude could survive that long,

plus that drug wore off way too fast, like 5min. they just wanted to add yet another plot move to drag this out, basically 80% of the movie is them in their apartments and literally no one else in their area survived, but magically there was a boy, there was a girl, and they fell in love ;/