If you want a drama that will make you yell at the main characters, want to punch the male lead, hope that the female lead ends up with the second male lead, and have you more invested in the supporting characters relationships, then this is the drama for you!
I am almost mad at myself for spending so much time watching this drama. The only reason I'm not is because the premise was really good. The story had so much potential but was sadly completely ruined for me by Ha Suk Jin's character. This is the first drama I've completed where I truly hated the male lead. He treated Park Ha Sun's character so horribly, and just when I started to accept him as her love interest (note: ACCEPT, not support), he turned around and made me wish he would disappear. I've never watched a drama that made me think: "there's no way this couple would last". I don't know how he would ever earn her trust back after all he did to her.
On another note, the acting was wonderful! Even the supporting actors were phenomenal. I particularly enjoyed the three students' characters. They were great comedic relief without turning the characters into a joke or making them one dimensional.
I enjoyed the music as well! Although most of the soundtrack is instrumental, I actually downloaded some onto my phone I liked it so much.
I probably would have rated this much higher if the ML didn't piss me off so much, but other than that it was enjoyable (mainly due to the supporting characters).