The story starts with Negi Springfield, a 10 year old Welsh boy, graduating from his magic school. To continue their training to become a Magister Magi (something like a Master of Mages) each student receives a task after graduation. Negi receives the unreasonable task of being a teacher in Japan. That’s how he ends up being an English teacher for a girls’ middle school, and the homeroom teacher for Mahora Academy’s class 2-A: a second year class with thirty-one 14-year old girls.
Taken from Lunatic Antics