Well, it is a shame but it was a real case in Korea few years ago that two juveniles have butchered a little kid. Also it is a serious issue in Korea that the laws and punishments are very weak including juvenile justice. All the episodes were based on real cases in Korea that were major juvenile issues in recent few years. This drama has shown serious issues in Korea and dealt some cases to help people realize that juvenile crimes are not minor crimes anymore but they have become serious crimes. I really wanna say that the actors have done great jobs.
And before you judge "Asian" dramas for different cultures that you don't understand, I really recommend you to look up their cultures before, after or while you watch them because that's what most Asian people would do when they watch "Non-Asian" dramas.
And before you judge "Asian" dramas for different cultures that you don't understand, I really recommend you to look up their cultures before, after or while you watch them because that's what most Asian people would do when they watch "Non-Asian" dramas.