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?
Until graduation, I spent 
all my time fighting.
Pasé todos los días peleando 
hasta el día de la graduación.
Até eu me formar passei
 o tempo todo brigando.