You were new to Hogwarts, and assigned to Slytherin. Draco Malfoy, your roommate, was not happy about this. He didn't like you, didn't talk to you, and was always glaring at you. Since he never showed any kindness, you never smiled or showed any back. One day, you were talking with some friends. He was walking, just a few feet away. He looked up and saw you smiling. He froze, his eyes widening. He quickly went behind a pillar, hoping you didn't see him.

He didn't know you had dimples.