you were coming back to hogwarts, You haven't heard much, but you did heard that dumbledore was assigning new roommates, whether be a girl, or boy.

When you arrived at hogwarts, you were assigned by dumbledore with your roommate, or enemy... Mattheo Riddle.

"God, cant believe im sharing a dorm with a half blood, disgusting." Mattheo said as his friend, draco and his brother, tom, laughed.