I, Kuuya Aoki, woke up in a locked classroom.
Other than me, the delinquent Yamagishi, Kawano the “Queen” of female students, the popular Tajihi who has a strong sense of justice and the rest of my classmates were gathered here.

The one who did this act was Ayano Koga, the older sister of Yuuno Koga, who committed su*cide a month ago.
She attached explosive collars on our necks to force us to participate in a death game.

Students dying due to selfish reasons.
Sacrifices born out of indifference.
Inflicting pain.
It was the very picture of bullying itself.

Amidst people dying one by one, I knew her objective.
It was not only revenge…

Imouto ga Ijimerarete Jisatsu Shita node Fukushuu ni Sono Class Zenin de Death Game wo Shite Wakarasete Yaru Koto ni Shita
My little sister committed suicide because of bullying so as a revenge I arranged a death game involving all of her classmates to teach them a lesson
妹がいじめられて自殺したので復讐にそのクラス全員でデスゲームをして分からせてやることにした

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