You and Draco were enemies. You were a muggle born- and he hated muggles.

You and Draco went to a party at Cedric Diggorys dorm. You and Draco both got drunk and you started lap dancing on him. Draco took you to his dorm and you guys hooked up. ( had sex )

The next morning you and Draco both woke up at the same time and you noticed that your clothes and his clothes were scattered on his bed and you were wearing his quidditch hoodie. And he was wearing just boxers