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?
I told you I'm not giving up on you! And 
I won't let you just throw this away!
¡Te dije que no te daré la espalda!
Eu disse que não vou desistir de você!