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.
A new kind of disease has been 
spreading among young people.
هنالك نوعٌ جديدٌ من الأمراض
ينتشر بين الشباب
Eine neue Art Krankheit verbreitet sich
heutzutage unter den jungen Leuten.
Una nueva enfermedad
se extiende entre la juventud actual.
Una nueva enfermedad
se extiende entre la juventud actual.
Dans la société actuelle,
Nella società contemporanea...
Um novo tipo de distúrbio está se
espalhando entre a população jovem.
Новое заболевание всё чаще встречается 
среди молодёжи.