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?
What do I want? Just killin' 
some time. So hang out with me.
Solo estoy matando el tiempo.
O que eu quero? Matar tempo, 
então passe um tempo comigo.