Oresama Teacher, Vol. 1

After Mafuyu is expelled from school for delinquency, her mother sends her to an isolated country school, where Mafuyu tries to transform herself into a well-behaved young lady. But, after she rescues her new teacher from a beating and then discovers that the school is full of delinquents, Mafuyu realizes that turning over a new leaf is going to be difficult.