Draco was drunk. Absolutely, totally, shaitfacedly drunk. He had been drunk since about 1am, and had no intention of sobering up before he went back to Harry tonight. He'd asked the house elf that brought the whiskey to tell him when Harry got back to the castle, and where he was. He hoped Harry would just go back to his room, but he wasn't counting on it either.
He didn't even notice the knocking at first, figuring it was just the pounding in his head taking physical form. But, no, it was definitely the door.
"S'open!" He yelled, then winced. Too loud. Everything was too loud.
He was born surprised and unsurprised to see Theo.