Kumi Katayama: A math teacher at Kokatsu Academy plus the homeroom teacher of course two-C. Becoming put in place by Kei Akashi for using violence in school, she's suspended from her do the job and has a psychological breakdown. Atsushi Takayama: Target from Yumi Shiina's Synergy tales. A person https://www.youtube.com/watch?v=ILKyE5vBc8A