Went for this drama wanting to watch pure comedy after finishing Scholar Who Walks The Night, and the trailer looked like a familycom but it turned out to be so dark and real it took me by unpleasant surprise. I know I will get a lot of flame for this as a lot of other reviewers praised for well balanced darkness of the story I instead found it bothersome. I know that extremes of bullying in Korean school and consequences of it should be talked about but for me mixing it with such comedic element was kind of bad taste. It's my personal opinion so if you like the mix of two then this drama will be for you. I still got quite a few lols out of this and GongJoo is goals xDDD Didn't find music memorable, tho the eerie tune they used really got to me, I was scared I'm gonna have nightmares after this (weak ass nerv system), but I guess fitting for the occasions they used it. The actors are good. Guy who plays Ahn Dong Chil really makes you hate him with all passion of your soul. In general as much as I find the story interesting and grabbing your attention again and again the dark eerie moments leave really bad after-taste that's why I can't rate it high. But I guess I just watched this at a bad timing as I was hoping for something else so it doesn't mean that drama is bad. Maybe I should've read some reviews before watching it.