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