After her mother and father died, Shiori and her little brother Shu were taken in by their uncle. Soon after, Shu was hospitalized with a hereditary disease, and Shiori was sent to the school as punishment for fighting back against her uncle's abuse. Meanwhile, Hibiki has taken over leadership of class four, and Hyo appears before him, to make him an offer he cannot refuse.
At this school, you will obey only
في هذه المدرسة، ستطيعون فقط أوامر
In dieser Schule
seid nicht ihr der Boss.
Solo hay una regla en esta escuela.
Solo hay una regla en esta escuela.
Il n’y a qu’une seule règle
dans cette école.
in questa scuola c'è una sola legge...
Existe apenas uma regra nesta escola!
В этой академии 
вы будете подчиняться только