nekoniinyahh

When he was young Shirou had lost his parents in a large and unexplained fire. He was rescued and later adopted by a man named Kiritsugu Emiya who had revealed to Shirou that he was a magus, a person capable of using spells and magic.

Teacher tries to commit suicide at the beginning, but a student stops him and later thinks he was just trying to make himself taller. He is always in dispair (and yells it quite often).