A good, sensitive boy notices, how bad the world is, and comes up with a rather bad idea himself. His sharply intelligent, sociopathic girlfriend is a nice replacement of the Dostoevsky's Sonya character. Practically all characters are mentally disturbed. The bully and his minions seem to have no understanding of good and evil, or, if they do, they happily choose the latter. The teenage prostitute sells her body in order to buy her boyfriend's love. FL's mother is a travesty of a tiger-mother, who seems to draw sadistic pleasure from humiliating her daughter. ML's "business" partner most probably suffers from PTSD. Only the teacher and the policewoman seem to be sane and decent, but their world is so far away from the world of the students that there is no way they could help them.
The series is just as dark, as you can expect.