Warning! I will only say this once, so pay attention; this is SLASH and MPREG! The rating may go up later, depending on how my twisted mind develops this story.
Disclaimer: I don't own anything except the plot.
Chapter One
Sirius didn't know what he expected to find after going through the Veil in the Department of Mysteries for what felt like the millionth time. Certainly he hadn't expected to find himself on the outskirts of Hogsmeade, in what looked like the middle of summer. Deciding not to let this opportunity pass, Sirius quickly transformed into Padfoot and set off for Hogwarts, wanting to see if he'd finally made it to the right place.
He had no idea how long it had been since he'd fallen through the Veil for the first time, in his own so-called universe. It may have been months, or even years since that day. All he knew was that instead of dying as he'd expected, Sirius had ended up in the middle of some old witch's living room in Sussex. He'd found out a few hours later that he had, in fact, traveled to an alternate dimension. Since that day, Sirius had gone through the Veil several times, in an attempt to return to his own universe. Hopefully, he'd finally made it; he was getting tired of having to sneak into the Department of Mysteries. Not only that, but Sirius desperately wanted to know how Harry and Remus were doing.
He missed them both, for entirely different reasons. Harry was like a son to him, and Sirius longed to be there to look out for him, to do all the things that he, as Harry's guardian was supposed to do for him. He wanted to be there to give the boy 'the talk', to offer advice about girls (or boys), to see him graduate from Hogwarts. Sirius wanted to tell Harry how proud he was of him, for standing up to Voldemort, rather than simply giving up, as so many had already done. He wanted Harry to be able to depend on him for anything. Sirius knew that the Weasleys were more than capable of doing all those things, but it simply wasn't the same. While Molly Weasley may see Harry as another son, she wasn't his guardian. She couldn't tell Harry stories about how his father had chased after his mother for years, before finally getting her to date him. She couldn't tell him about all the times she'd babysat him, or how funny it had been when he'd thrown up all over Remus right before he was about to eat. She also couldn't tell Harry about the true nature of Sirius and Remus' relationship.
Sirius and Remus had fallen in love with each other during their years at Hogwarts, and had been dating when Harry's parents died. After his escape from Azkaban two years ago, Sirius had realized that he still loved Remus, and had hoped that the werewolf might feel the same. It wasn't guaranteed, after all; werewolves did mate for life, but they hadn't been mates when Sirius had been sent to Azkaban. After Voldemort's return, when Dumbledore had sent Sirius to Remus' home, the two men both admitted that they still had feelings for each other. They were mates before they'd moved to Sirius' old family home. Sirius had intended to tell Harry about his relationship with the werewolf over the summer, but the incident at the Ministry had made that impossible for the time being.
Thinking of Remus made Sirius feel especially lonely; he felt empty whenever he wasn't with Remus. He wanted nothing more than to be able to walk through the door of his hated house, take the beautiful amber-eyed werewolf in his arms, carry him up to their room, and shag him senseless. He knew that this would be a truly difficult time for Remus, possibly even harder than it would be for Harry, and he wanted to be there for his love, to soothe all the pain away. Sirius knew that although everyone in the Order understood that the two men had been very close very few actually knew what they'd really meant to each other, and would more than likely spend most of their time comforting his godson. Remus would be alone with his grief, as he had been nearly fifteen years ago.
Sirius was distracted from further thoughts of his love as he approached the castle. He heard several voices coming his way that he couldn't place, but knew that they were very familiar to him. As Padfoot, he dashed into a few nearby bushes, so he could listen without being seen. From his vantage point, Sirius could see three men approaching the entrance to the castle.
"So, do you guys have any idea why Dumbledore wanted us? I'm supposed to be out shopping for Harry's birthday!" One of the men said, in a deep, cheerful voice. He was wearing glasses, and had dark black hair that stuck out in every direction.
"Not a clue, my friend. He just said he'd detected some powerfully magical event in the village; maybe he wants us to investigate," Another man said, as he wrapped his arm around the waist of their third companion. This one also had black hair, but his was long and straight, and was currently pulled into a loose pointy-tale at the base of his neck.
"Guess we'll just have to wait and see what the man wants, then," said the third man, in a deep, melodious voice that Sirius recognized instantly. It was like music to his ears; greedily, Sirius took in everything about the man. He was of average height with sandy-brown hair that fell gracefully into his amber eyes; he was also a little pale and thin, but otherwise, he looked perfectly healthy. It was Remus.
Even now, Sirius could feel the pull of the bond he'd developed with Remus during their mating, drawing him towards the other man. However, that bond wasn't as strong as it normally should have been, for one simple reason. This wasn't his Remus. It was now perfectly clear to Sirius that he had not yet reached his own world. It was also very obvious that this world had developed differently than his own; the two men with Remus were himself and his best friend, James Potter.
Sirius knew this wouldn't be easy for him, but if he ever wanted to get back to his own world, he needed to speak with Professor Dumbledore. That meant that he would also need to speak with the three men who were just about to enter the castle. As they reached his hiding place, Sirius padded out from behind his bush. Hearing him bark to get their attention, they turned as one to face him. The Sirius of this world released his hold on his mate's waist as all three of them pulled their wands out, instantly suspicious of this newcomer.