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?
There are a lotta kids 
here who dye their hair!
¡Además hay muchos alumnos 
que tienen el pelo teñido!
Há vários outros alunos que
 também pintam o cabelo!