Oresama Teacher

Oresama Teacher (俺様ティーチャー, Ore-sama Tīchā) is a Japanese manga serialized in shōjo manga magazine Hana to Yume since 2007, written and illustrated by Izumi Tsubaki. As of the end of 2014, 17 bound volumes have been released under the "Hana to Yume Comics" label. The manga is published in English by Viz Media and Madman Entertainment, and in French by Delcourt.

Plot
High school student Mafuyu Kurosaki is expelled from her school after getting caught by the police celebrating the victory of her school's gang. Annoyed with her yankee ways, her mother sends her to Midorigaoka Academy, a private school famous for its delinquents. She meets a man, who turns out to be her teacher... as well as a childhood friend, Takaomi Saeki. He forces her and another delinquent, Hayasaka, to join the Public Morals Club- a club dedicated to achieving Takaomi's goal of doubling the number of students in five years.