Botchan (Kazunari Ninomiya) has sense of strong justice and does not lie. He is offered a teaching job at a middle in a small village far away from his hometown of Tokyo. Botchan accepts the position and begins to work as a math teacher. The assistant principle there wields absolute power. Botchan has a hard time dealing with his fellow teachers and the students.

A comical and heartwarming drama about a university lecturer on animal behavior who just loves all living creatures. Once he starts thinking about them, he becomes too absorbed to care about anything else! People think he is quite odd and eccentric! But gradually his attitude, free from restrictions of rigid common sense and social norms, changes the way of thinking of those around him. They can recall a time when they, too, were engrossed in something they loved.