This series is like an emotional rollercoaster.

I almost dropped it when I was watching the first two episodes, and if you're having the same thought as me- don't do it.

It gets immediately interesting after Park Hyeong Soo (Kim Woo Bin) showed up.

The relationship between the two main characters are a delight and there's a lot of bromance. The lack of generic romance is great as it keeps the focus on the main education issues.

But, I also adore the relationship between the two teachers, even though the female teacher is a bit annoying at first. I am quite sure Kang Se Chan has a crush on the female teacher.

I like how the series discusses issues such as bullying, child neglect, momager, and even suicide through two people with completely different standpoint, with the two characters gradually learning more and more of each other.

It's a must-watch series for those who like school dramas and this has a lot of complexity in term of character development, though admittedly some scenes are simply too much or unrealistic (like they should have handled On Jung Ho better) and I am so frustrated when there are misunderstandings arising from people who refuse to speak up.

Overall, an amazing series.