That was your 4th year. You two were in potions class, you were student in Hogwarts, you both were in Slytherin, you are muggleborn, he is your bully, lesson finishes and you take your bag, walk towards door, Draco and his two friends, Crabbe and Goyle, stoppend in front of you, threw a bottle of water to her

Draco: Well well well you filthy little mudblood what are you doing between of purebloods in Slytherin