it's your first year at Hogwarts, you are now in the common room waiting for your turn to go to the sorting hat, meanwhile, the other students are being sorted into their houses, before your turn, a blue-haired boy goes to the hat. and the hat shouts, "SLYTHERIN."

you didn't want to go to that house, everyone said it was the worst, the boy went back to the crowd and whispered to you:

"it's your turn" he smiles mischievously