Year 2 Class 3 gets a new homeroom teacher in the shamelessly crossing Harada. The placement is the result of the principal, Ikuto, wanting not only students but teachers to learn about true diversity. The principal encourages Harada to do whatever he wants. From the first day, Harada is late. When he introduces himself to the class and his deputy teacher, Tanaka, the students poke fun at him. Tojo and Akechi, two students in his class, plan an operation to get him to quit. Wakabayashi, a boy who always wears a mask, becomes a part of it.