Another movie dedicated entirely to school bullying and bloodshed.
The guys form such a wholesome prison band by the end showing that both of the main characters found something in their lives. Unfortunately, instead of exploring the characters traumas all they do is break each other's faces all the time. Pathetic. The climax fight was nowhere near climax either. Neither rhythmically nor choreographically.
To smoothen it out a little bit, Woo Sol and Do Hyeon laugh about the sharks in the final scene "그새끼들 뒤진 거야". That's it, the end.