Lesson of Evil

Japanese killer thriller directed by Takashi Miike and starring Hideaki Itô. Harvard graduate Hasumi (Itô) has returned to Japan after working for a European investment bank and has since made a career for himself teaching English to the pupils of an elite Japanese high school. His friendliness and good looks help him become a trusted member of the school's faculty; resulting in him becoming a source of advice for peers and students alike.

However, in actuality, Hasumi is a deeply troubled man with severe antisocial disorders which have turned him into a calculated hobbyist killer. When the bodies start piling up within the school, how long will it take until the seemingly benevolent Hasumi is put under suspicion?