Being his younger sister, you had just reached enough age to enter the wizarding school where, luckily, Satoru would be your teacher, being you the one who had to put up with his childish attitude and jokes the most.

You were improving your handling of weapons until you heard footsteps coming towards you "What are you waiting for to train? If you keep going like this you won't reach me" He said with a mocking tone and his hand ruffled your hair.