Kumi Katayama: A math Trainer at Kokatsu Academy as well as the homeroom Trainer of class 2-C. Staying set up by Kei Akashi for working with violence at school, she is suspended from her operate and it has a mental breakdown. Atsushi Takayama: Focus on from Yumi Shiina's Synergy https://www.youtube.com/watch?v=ILKyE5vBc8A