Mahou Ninja Sensei Naruto

Attention, English is not my main language. This story is written by a fan so it will have grammatical errors and some plot eggs, read it at your own risk. Negi Springfield is determined to become a Magister Magi, after 7 years of study and training at the magician school; The final test arrives, the last and hardest exam to become a great Magister Magi: to be a teacher! On the other hand Naruto has been since he can remember a total joker but they always forgive him. Then why? Why is it his punishment to be an assistant to his little brother figure !!??