Ok honestly high school dramas are not my cup of tea, but I have to say I enjoyed this. We have the usual nosy, good hearted but not really good at studying female protagonist...we can say she's dumb, but I don't think that's the case, and I had a really good vibe from her mostly because she thinks carefully through stuff and she make her own decision (and probably the fact that she has low scores it's just because she's too busy being a teenager and having fun). I was kinda like her so maybe it's because I can relate to her character. The male lead, on the other hand, didn't gave me a special impression, it was just okay. The usual number one student with great ego and flirty personality and some dark family past. But if they wanted to use this as leverage to make us take pity on him, well he's nothing compared to the second lead, and here's my legendary second lead syndrome over Ji Soo's characters. Will he ever be able to get the girl? Only the time will tell xD
Fangirling aside, I always use as a meter of judgment for a good drama the message it contains and I have to say, in this is a pretty good one: I like how the guys didn't outcast completely Soo Ah despite her actions, they showed their humanity and tried to understand her instead of marking her as a villain and such. Basically I think it's more pleasant to have an antagonist who isn't like a disney villain, to see his/her backstory and having a reason for being that way. People are not good or bad, they just make bad or good choices and that leads them to become more or less evil. She is just a girl, and she suffered more than anyone for her bad decisions, so she's salvageable. Also the female lead always had the chance to humiliate her publicly and get revenge, instead she chose not to use this power she had over her to damage her. That's what this drama conveyed me and I think it's a good example to show to young people (we always forgot that those programs are meant to young people and that they're affected by everything they're surrounded, as the drama clearly shows us)
The only negative thought on this drama I have is that there are things not really well developed (like the issue with Dong jae just resolved itself in few minutes and his character isn't very explored) and some stuff like self harm, suicide, abusive parents, sexual harassment are treated a bit too lightly in my opinion. I would have kept the whole storyline more bright instead of putting in all that stuff and not develop them properly.