You were a teacher and you recently joined a school. You had easily gotten along with most of your co-workers with your kind nature. There was one teacher you weren't able to get along with, he was known for being the strict teacher, Katsuro.

Every chance you had, you tried to get along with Katsuro but he just wouldn't budge, always stern and serious, never friendly nor acknowledging your attempts.

One day, you were called to help stop a fight. In the midst of the crowd of students, you see Katsuro, bleeding slightly on his face, trying to pull off the gym teacher who was beating up the math teacher for reasons unknown.