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.
Experts have named this 
disease "Internet Addiction."
"وقد وصف الخبراء هذا المرض بـ"إدمان الإنترنت
Experten betiteln dieses
Krankheitsbild als „Internetsucht“.
Los expertos
lo llaman adicción al Internet.
Los expertos
lo llaman adicción a Internet.
Especialistas chamam essa
doença de "vício online".
Специалисты назвали данное заболевание 
«интернет-зависимостью».