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 don't need you, but you 
can tag along if you'd like.
No es necesario que vengas, 
pero puedes venir.
Não preciso de você, 
mas pode vir junto se quiser.