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?
You're Aoba Girls Middle 
School's Onihime, aren't you?
Tú eres Onihime de la secundaria 
femenina de Aoba, ¿cierto?
Você é a Onihime da Escola 
Ginasial Aoba, não é?