Summary and Preview
Kumiko Yamaguchi, the granddaughter of a Yakuza boss, Kuroda of the Kuroda Ikka has a dream to become a teacher, but she is next in line to head the family business with the title of Ojou. However she is able to become a teacher at an all-boys private high school, but her class is full of delinquents. She tries to teach them not only mathematics, but about life. 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, while also providing comedic relief.