Nathan Douglas is a young man working as a high school biology teacher. His hobby is Taxidermy. He suffers from Dissocial Personality Disorder (sociopathy, psychopathy) because of which he doesn't understand people's feelings and emotions and can't experience them, but he can imitate them. People, and especially his students, he considers only as an object and subject for study. His class is the only class in the whole school where there is a living corner with rabbits, rats, mice and hamsters.