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?
How about putting that power to good use? 
We need your superhuman-like strength.
¿Por qué no usas esa fuerza 
de manera productiva?
Que tal você nos ajudar?