Negima!

Negi Springfield, a 10-year-old wizard-in-training, must pass one final test to become a Master Wizard. His task is to become an English teacher at an all-female boarding school, a position he is ill-prepared for. He immediately offends one of his students, Asuna Kagurazaka, by replacing her beloved teacher and earning her enmity. Asuna discovers Negi's magical abilities and blackmails him into helping her, forcing them to collaborate on various tasks, including battling evil wizards and assisting the class with their final exam.