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?
Anybody who's having a tough time at school 
should either drop out or shut up and take it!
¡El que no pueda estar en la escuela 
que se vaya o que se aguante!
Quem está com problemas na escola tem 
que ir embora ou aguentar calado.