Negima 28: Magister Negi Magi - Ken Akamatsu

Ten-year-old Negi Springfield has just graduated from a British school for wizards. After meeting with the school's headmaster to discuss his graduate work assignment, he finds that he will be moving to Japan-to teach English at an all-girls high school. Under strict instructions not to show his magic powers, Negi finds that he can't resist using them to help others. Of course, despite his good intentions, sometimes his magic just makes things even worse!

Now that the tournament is over, Negi wants to find his missing students and take them home. But first he's confronted by a sinister man who claims to know the answers to all of Negi's questions. He promises to share those answers-but only if Negi will join his cause.