Gokusen is the story of Kumiko Yamaguchi, aka. Yankumi, a fourth generation crime syndicate member. She's gone straight and wants to be a teacher though, but she's one you don't want to mess with.

Gokusen cuenta la historia de Kumiko Yamaguchi, conocida como Yankumi, una miembro de la cuarta generación del sindicato del crimen. Sin embargo, se ha vuelto heterosexual y tiene la intención de convertirse en maestra, pero es alguien con quien no quieres entrar en conflicto.

Gokusen is the story of recently graduated Kumiko Yamaguchi, aka. Yankumi, and her life as a new high school teacher. Unlike the other new teachers at her school Kumiko gets placed with the toughest kids there. And has to deal with all their rebellious actions. However as time passes she gains her students respect by helping them out both in school and in their daily lives. Which is easy for her to do as her students remind her of her life at home, since she is a fourth generation crime syndicate member and next in line to head it up. She's gone straight and wants to be a teacher though, but she's one person in whose class you don't want to be caught fooling around.—Anonymous

The 3-D students are very naughty, and so the headmaster employed Kumiko Yamaguchi, aka. Yankumi, to teach them, because he knew her background - The 4th Gokusen Heir. She teach the class Mathematics, the condition is to hide her Gokusen Heir status from the students and the teachers inside the whole college. Could she made it?—Sampras

Kumiko Yamaguchi is a young woman who has dreamed her whole life of being a school teacher. However she has a secret. She is the heiress to the Oedo Yakuza clan. She becomes a teacher to a class of troubled students and tries to keep her secret as she shepherds her students toward graduation.—Marc DuQuense