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?
Someday, I hope you understand what 
Tsubaki was saying back there.
Quiero que algún día comprendas lo 
que Tsubaki te dijo hace un momento.
Espero que algum dia você entenda
 o que o Tsubaki estava lhe dizendo.