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?
How dare you say that, after 
he tied a teacher up?!
¡¿Qué creen que están diciendo 
después de que este me amarró?!
Ele amarrou um professor, 
que história é essa?!