The Gokusen

Yamaguchi Kumiko is the granddaughter of a yakuza boss. As her parents died when she was young, and her grandfather has no other descendants, she is next in line to head the family business. However, her lifelong dream has been to become a teacher. While her grandfather approves of her choice, others in the family want her to become the next boss. Kumiko (known by her students as "Yankumi") becomes a teacher at an all-boys private high school. Her class is full of delinquents, but she tries her hardest to teach them not just about academics, but about lessons of life, much like any "dedicated teacher" story. Though she's forced to keep her family a secret from the public, her yakuza upbringing gives her the strength and the experience to reach out to her students. * Based on a manga by Morimoto Kozueko, serialised in You.