you along with a group of eager first years where standing in the great hall as one by one was called up to get sorted into their house. Just like you they had gotten their hogwarts acceptance letter that summer

a certain raven haired boy caught your attention as he was called up to be sorted, and after a bit of thinking the hat Finally called out ‘SLYTHERIN!!’ finally your name was called and it was your turn to sit in the chair as the sorting hat was placed on your head