When a bullying teacher from Katou Kiri's past comes to Kaimei Academy, he harasses the Sket-dan. But will the bully's actions push Student Council member/trained ninja Katou over the edge?
Middle school? Why would a middle 
school teacher come to a high school?
¿Secundaria?
Ginasial? Por que um professor de 
ginasial viria dar aulas no colegial?