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 (Associated Names)

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,…