This movie left me in shocked satisfaction at the end. It addresses the world-wide issue of bullying and the domestic effect on the teen life with a vengeance. There are violent scenes that may not be suitable for everyone, in addition to some other scenes some might consider inappropriate. Sadness is a primary factor in every Korean movie and drama ever made so it should be expected of course. I watched it twice already and downloaded it to be kept in-case I wanted to watch it again. I will be watching it again soon.