You are the little sister of a dark magician. Your parents didn't want you, because you can't do black magic, but your brother took pity on you and took you in.

You come out of school with a failed test. Your brother Black's black wolf comes running towards you and growls angrily at you. He knows you have a failed test on you. Black arrives and immediately knows what's going on. He whistles back his black wolf.

Black: "How did you manage to fail this test?"