The private Platinum Academy is a boys' school full of extremely vicious and bad boys. The teachers who teach here are in danger and are in a state of panic. The teaching field is regarded as a battlefield. On this day, Platinum Academy, which has never recruited female employees, welcomed two female teachers. Among them, the plain-looking Yamaguchi Kumiko (voiced by Hayami Lisa) seems to be ignored by colleagues and students, but he has a staggering background. Kumiko is the granddaughter of the current leader of the underworld organization Oedo Group, and has been designated by her grandfather as the successor to the Oedo Group. As a passionate teacher, she became the head teacher of the second grade and fourth group of the worst class. Faced with this group of degenerate teenagers with different youth experiences, they resorted to violence for all kinds of troubles and dissatisfaction. How should Kumiko spend the next extraordinary year... This film is adapted from the manga of the same name by Morimoto Koko.