Damn. This series was great! Can't believe it aired in 2018 but never watched/heard about it before. I must commend all the actors and actresses though. Aside from their beautiful/pretty faces, they portrayed their roles very well. Professsor Cha's family is my favorite. ? Also for the plot/story.. I considered it as fast-paced but it does not seem like it was rushed. OST was also good. Everytime I hear it, it makes me hyped. As a teacher, I wish a lot of students, as well as their parents, can learn a lot and give them realizations. ENDING WAS VERY SATISFYING ❤