Densetsu no Kyoshi (2000)

Densetsu no Kyoshi 2000 / 伝説の教師 2000 / Legendary Teachers

A man who appears to have no particular passion for anything ironically proves effective with troubled high school students. Known as a legendary savior of problem schools, he shows up one day to salvage what's left of a class that had fallen apart completely. His highly unpredictable reactions and controversial advice to students shock the teachers and staffs much as they do the problem students themselves.