Although in the begining you'd wonder but also hope that the teacher doesn't get caught. His intention of finding the one who killed his student and settling scores is presented in an amazing way. The best part was the true faces of people that he wanted to show. Teachers who don't care about the wrongs of the students, classmates who did not regret their bad behavior, a friend's dilemma, choices made by someone that could sacrifice someone else and the biggest reveal of the culprit.Shows about differences between teachers who are doing their job or their duty. Ending was memorable. Everyone shined in their roles and in their times. Even though it was a serious drama, it had light comedy element.