Fukushuu Kyoushitsu

Fujisawa Ayana, a third-year middle school student who was subjected to severe bullying in her class, makes a decision. "I'll make every single classmate experience the same hellish suffering." The mastermind behind the bullying remains hidden. Is the real culprit her best friend, or... "It won't end until I've hunted them all." A life-or-death revenge drama against her 28 classmates debuts in junior bunko!

Source: Futabasha, translated