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's the air of the outside world feel 
after bein' locked up for two weeks, huh?
Como é sentir o sol depois de duas
 semanas de confinamento, ein?