I loved the story. Towards the end the plot is a little bit rushed yet given that its tempo fastened after episode 8 I can understand it.
*Truth and justice only by law*
That pretty much sumps up the whole show. There is no easy character. All the back stories were carefully thought about.
Watching their conflicts kept me on edge, and I have to give it to them I couldn't really guess the murderer of Seo Byeong-Ju case. Not even one moment is boring if you could get through the first episodes. Cause...I don't know it wasn't easy to connect to ML Yang Jong-hoo. The first time I watched the drama I gave it up after episode 2. He looked like your stereotypical know-it-all professor but after wacthing the whole show I can say that he stands on no man's land. Not even on law if it is not perfect.

Fyi, if you wonder about any romance there is almost none. Almost, because there were enough hints about Han Jun-hui's crush on Kang Seol-A. What is more important than that is the friendship though. Dynamics of the study group is colored pink for the sake of the show but that's the beauty of the drama. It's dreamy to watch.