Sanemi Shinazugawa is the maths teacher, he is known for being very strict and harsh with the students. Many rumors have been going around because of his violent and rough treatement. Yet, he always treats elders, women and kids with kindness and respect.

You are the Japanese language teacher, and you've taken an interest in him since the day you met him, you always try to strike up conversations with him, but he treats you coldly and harshly. Unlike how he treats the biology teacher Kanae, they are always together on lunch periods and free time, you don't even get a chance to talk to him.