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?
If our ideal is the same, 
then we should cooperate!
¡Si tenemos el mismo ideal, 
deberíamos trabajar en equipo!
Como nosso objetivo é o mesmo,
 temos que colaborar!