Here you go
"You have three days, Albus." The Minister of Magic said quite firmly, pacing around the small, round office agitatedly.
"Surely a little more time couldn't hurt… A week, if you would." The Headmaster asked reasonably.
"I'm sorry, Albus, but it isn't my decision. I've met the boy, he's quite nice, but we can't have a full-time werewolf roaming Hogwarts. It has been discussed, and you have three days. If he isn't human in three days, then… well, you know. I'm very sorry."
Dumbledore watched as the Minister of Magic disappeared into the green fire. He sat quite calmly at his desk, pondering for a few moments, and then turned to one of the portraits that were watching him eagerly.
"Would one of you please go tell Mr. Sirius Black that I wish to see him? He'll be in the Infirmary." Albus said finally. At once, half of the portraits emptied. They all wanted to be useful to the Headmaster in such a perilous time.
In a few minutes, the portraits returned, and then a few minutes after that, there was a knock at the door.
"Come in." Dumbledore said solemnly, and watched with cool eyes as Sirius skulked into the room, not meeting Dumbledore's eyes.
"Beastly child," one of the female portraits commented. Sirius flushed and examined his fingers.
"Sirius, we've already discussed this. You know what you have to do, and you have three days to do it." Dumbledore said coolly. Sirius gaped at him.
"But he's in full-out werewolf form. He'll attack me if I go near him!" Sirius whined. Dumbledore's eyes glinted slightly with slyness.
"Technically, he's partially human, so I'm sure you'll find a way. Now, do you want an animal cracker?" Dumbledore said, slightly kindly. Sirius stared blankly at him, but took a cracker out of the proffered box.
It was a dog. Sirius laughed, and walked out the door without a goodbye.
xo
Sirius slowly opened the door of the Shrieking Shack, concentrating on becoming the dog that had become so natural to him. He fell to the floor as his bones shifted and his skin covered in fur.
The moment he was completely transformed, he started searching the room for Moony. He could smell him, it was blatantly there. But where was he?
All of a sudden, what Sirius had thought was a pile of raggedy blankets moved. With a slightly yelp of pity, Sirius padded over, nudging the strange humanoid with his nose. It fell onto its back, revealing its face.
It was definitely Remus. His face was cut up and bruised, and one of his ears was still one of a wolf's, as was his lower body. It looked like more than one of his bones had broken, and his fingers looked like raw meat.
Sirius whined and snuggled up to the mauled thing, licking its face. Sirius hadn't felt guilty the past three days much. He had felt bad that James had gotten injured, but he didn't feel at all bad about Snape, who was milking up his bruised back so much it was sickening.
But now, seeing Remus, torn apart, he felt guilty. His poor, lovely Remus. He pushed his canine form as close as he could to Remus's without breaking any more bones, and rested his wet nose on Remus's neck.
"Sirius?" The quiet, pleading noise shook Sirius from his stupor. Remus had woken up. And his ears and legs were normal again, albeit shattered.
"Remus…" Sirius whispered back.
"Can I go to the Hospitable Wing?" He asked immediately. Sirius quite nearly laughed, and rose to his feet.
"Of course." Sirius murmured, scooping Remus up and carrying him tenderly out of the Shack.
Madam Pomphrey was haunting the exit. She stole Remus away from Sirius and hurried off.
But don't you think this is the end. Bwuhahaha.