Granted, it was fairly cliched, as people have pointed out, but I still found the moment where the class 'saved' Ibuki to be heartwarming. Overall though, this show was a wild, suspenseful and very fun ride that ended in an important moral lesson.
Episode 5 was a bit of a let down but episode 6 more than made up for it. Don't think this was intentional but the focus on Tokusatsu as part of Hiiragi's past coincides with Masaki Suda's own history as a Kamen rider, while the actors who played Tanaka and Tsuboi both featured as antagonists in said series.
It's fairly grim but there's quite a few funny moments- although some cross the line into dark humor.
Story wise it's quite dark so far- after all, it all revolves around a student's suicide, and the teacher isn't afraid to use violent means and threats against his students.
Love that there's no black-and-white morality- the students, while being the victims, are far from innocent, while Bookie, despite being a killer, has heroic traits and a sense of justice. Suda and Mei are great actors in their respective roles too.