I think first off the actors did pretty decently, I really appreciated the acting of the main cast, however, no matter how good the cast is, if the plot is 'eh' the show is gonna end up being 'eh'.

I think the show's idea was good, just executed in such a hasted and messy way. With only 7 episodes, we aren't able to fully connect and understand enough of the characters that we need do. Some of the plot ideas seemed a bit out of place and pointless, but then again that could be because we didn't have enough time to explore the characters and backstories. Some things felt rushed and shallow, e.g, the teacher being Kang Inhan's killer? And Woojin's shallow and unexplained relationship w/ the teacher when apparently he liked Hera all this time, but we never were really shown that till the end. The lack on context w/ Jae-i's mother. Of course not everything is meant to be explained, but i feel like we could've gotten more out of this show. The idea was good, just could've been executed a bit differently. At times it was a bit messy and a lot was going on with not much meaning or depth i think. But it wasn't boring. It had potential, and I think with the ending credit scene they showed, there is definitely potential for a better season 2, if they so choose to make one. The end scene where it's hinted that Kang Ha maybe isn't done with his revenge and starts to threaten Kim Rian, if continued correctly, could make for a very interesting season 2.

Oh, another thing i wanted to mention is that the whole plot line with that class president kid and his mum(principal) was not explained enough and there's a lack of context about him and his backstory which would have been relevant as he was the only blackmailing Jae-i. I don't know, a lot felt unfinished with this show, however i will say that the ideas were good and i think it could have been a hit show if planned more carefully like penthouse or sky castle or class of lies, idk. But yeah!