This drama I swear bro they made All of Us are Dead but better. The ending was so bad, the fact that they killed everyone besides Kim Chi, Na Ra, Ae Seol, and another person died because of that one dude who was first place in class because the other first place died. The fact that some people say that if he did not get bullied he would have not killed anyone even though he killed people who tried to comfort him when he becomes crazy that the CSAT was canceled. That was the worst way they could had ended the dang drama. They also could had at least shown the 4 remaining survivors being together or something but nooo they had to make it look like there was only one remaining this drama does All of Us are Dead but better. Do not watch it, it is so ass that I believe it would have been better to cancel it. The only reason is overall score is 1.0 is because I can't do 0.0 and the only thing that would change my mind is that I see the 4 people well together and see Kim Chi and Na Ra together. Alright enough said this drama is worst than those cringe memes I always find online and they made a really good build up but than ruined it and did not even try to at least give us something good.