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?
If you're going to get in my way again, I'll 
be ready to throw away this armband anytime.
Si continúas intrometiéndote, en 
cualquier momento me desharé de él.
Caso você volte a me importunar, tiro a 
minha faixa sem o menor problema.