1-nen A-gumi no Monster

From the mangaka who wrote "The Story of an Onee-San Who Wants to Keep a High School Boy".
A Private Girls' High is a special school nurturing young maidens to be graceful, delicate intellectuals.
Except that class 1-A, infamously known as the "Class of Monsters," is full of bullies, blackmailers, scheming sadists, and other trouble makers.
Within a week, every teacher who has taught this class has either quit, resigned, or even been imprisoned.
However, the plain-looking Jimi Tarou shall carve out his name to become a legendary teacher.