Just want to say that while there will be no character bashing, they will obviously have flaws. They will be the same flaws that the cannon characters have, as i want to try and stay true to the characters as they are, but there will be changes to Tom and Harry mainly. Harry because obviously he's already an adult, but i won't try to change who that person may be, he won't suddenly start liking books, or something, because that isn't ever really shown to be true to the cannon. (Not throwing shade to any authors that interpret the cannon that way). Tom will obviously be different, as this Tom can feel Love.

Voldemort had emotions, obviously, as Harry often felt them, but because he was conceived on Love potions he can't feel the love like everyone else, but this Tom can. Other than that, he will mostly be the same.

Also i know that it may feel like i'm bashing Harry at times, but bear with me, it won't be forever, and a good bit of plot revolves around Harry's growth and his relationship with Tom.

When he woke up, Harry was, to say to least, confused and angry. He had just managed to start a normal life, and while he'd known it wouldn't last, he was still allowed to be angry about it.
Before he even opened his eyes, he registered that he felt weird. Very weird. He felt weak, heavy, very tired, and his scar was hurting. It wasn't hurting the way it had hurt when Voldemort was nearby, it felt more like a fresh cut. There was also an ominous weight on his leg.

After very quickly assessing his 'weird feeling' he opened his eyes, and what the saw was heart-stopping.
There was his mum, lying on the floor, surrounded by rubble.

There were a thousand thoughts running through Harry's mind, but the main one at that moment was 'What, In, the, holy, fuck?' As he looked closer, he could see that she was breathing, very faintly. She was breathing!
As he kept his eyes fixed on her, he began to try and explain the situation away, perhaps it was some sort of warped dementor flashback, or even just a nightmare. But it felt so real. Maybe it was time-travel? 'But that wouldn't work', he thought sullenly, because by this point his mother would have been cold. Then he remembered something he had read, while he was revising for his auror entrance exam, a theory that, apparently, was treated by great disdain by the wizarding community;
Dimension travel.

It was written by someone that Harry thought would really get on with Xenophilius Lovegood. It was the idea that someone could pass through a barrier of sorts, and enter another timeline. When Harry had asked about it, Kingsley had looked at him like he'd just suggested they go hunting for crumple-horned Snorcacks, but never the less, that looked like the only explanation for his situation for the moment, he could explore other theories when he had the whole picture.
Finally, he managed to rip his eyes from the woman on the floor, to look at himself. The 'weird feelings' explained, he felt slightly less worried about his physical state, but then he looked at the weight on his leg, only to discover a baby lying fast asleep on it.
'What the actual hell' Harry panicked, 'Well, this backs up the whole dimension travel theory, but really?'

The most noticeable aspect of the child, was the small star-shaped scar on its forehead, near its hairline, over its left eye, opposite to where Harry's was. Tufts of dark brown hair covered its head, falling over its face, lacking the Potter mess that Harry had inherited from his father.

His father!

If his mother was alive, was his father too? Why had Voldemort spared them? Had he, in this universe, decided to keep his promise to Snape? Then how had he, and this other baby, survived? Harry was torn from his plethora of questions by the child, that he had decided was male, which was starting to open bright blue eyes.

"Hwwwr" It smiled at him. He assumed it was trying to say Harry, which was quite cute, and reminded him of Teddy, who hadn't started talking yet, but very much enjoyed making noises with his mouth. It was surprisingly calming for Harry, and it helped clear his mind enough that he noticed the baby looked vaguely familiar, but he couldn't pinpoint where from.

Maybe this was some kid on a play date with him or something, and it was someone who had gone to Hogwarts with him in his world.
While he was pondering, the other boy had started drooling on him, which wasn't very pleasant. He went to wipe it off, and found that moving his baby limb was slightly difficult.
'Yay!', he thought in a tone dripping with sarcasm, which was lost on anyone but him, since he was thinking, 'I have the motor skills of a one-year-old, the perfect topping to a perfect situation!', 'Wait", he suddenly felt very apprehensive, 'does that mean…'

"Wegardum levosir" He managed to strangle out, 'Oh perfect'. Harry honestly didn't think he had it in him to react to his one detail, but it would mean communicating with people would be hard.
"Oh lily!" cried a very familiar voice, as Harry stared at the young face of his very much alive godfather. "Thank Merlin" sighed Sirius, as he checked her pulse, then finally he looked over to Harry.
"Boys, thank all the stars in heaven you're alive" Sirius ran over to them, looking at their foreheads.
"Paddy!" The other boy chirped happily, clearly recognizing the animagus.

"Yes Tom, it's alright, I'm here." Sirius mumbled, more to himself than anyone as he picked both children up in each arm, and starting to rock them, but Harry had stopped listening.

Tom

It was him! That was who the baby looked like, granted, he was a baby, but harry couldn't every forget that face, the one gloating over him as the basilisk venom worked its way through his system. How could Sirius not recognise him? Or at least not recognise him as Voldemort? Did Sirius not know what Voldemort looked like? But the main question was; why in Merlin's name was Voldemort a baby, and one that Sirius recognised?
Harry had to warn Sirius, it must have been some kind of trap! So, with his short, fat, arm, he pointed to 'Tom' and yelled "NO!" at the top of his lungs.

Sirius started at the sudden outburst, "Whoa, Harry it's okay, it's alright, just go to sleep, the order will be here soon, and your mum and dad will wake up, they're both fine, just sleepy, ok? I would wake them up, but I can't, I can't leave you boys alone, no." He trailed off, mumbling once again to himself, looking slightly manic.
Harry could understand, Sirius had just nearly lost half the people he loved in one night, and while he didn't want to stop trying to warn him about Voldemort, who was now fast asleep again, drooling on Sirius' shoulder, Harry didn't think Sirius needed any more stress, and Voldemort didn't pose a threat currently right? He could have attacked at any time, but he had chosen not to, maybe he was waiting for Dumbledore? No, that was unlikely, if that was his plan, he could just hide, not confound Sirius and pretend to be a baby.

Despite Harry deciding that the baby from hell didn't pose a current threat, he stayed tense, ready to react to any attack; it was a natural reflex from, well, the Dursleys, his school life, the War, and after the war. It was difficult to suddenly deny years of, well, it couldn't be muscle memory, now could it?

Maybe aspects from his adult-self had transferred to this form, surely his magical core had too, otherwise he would feel it being weaker, and it certainly wasn't by any means weaker. That was another question, if he stayed like this, would this body react as though this was his natural core size, and if so, did that mean, if stayed like this, it would grow as a child's would?
Wait, that wasn't necessary, he wouldn't be staying, he was sure everyone back home was already working on a way to get him home. 'Except,' he thought with a sinking feeling, 'no one knows I'm here at all.'
Harry had taken to travelling through alley ways after the war, otherwise he was constantly bombarded, by requests for autographs, or invitations for dinner, and it made getting around a huge hassle. He had been alone when he was coming from Ted and Andy's, and that meant no one knew he was here.

However, that also meant that he wasn't sent here, he was pulled here by some unknown force. Maybe it had something to do with how him and Satan-baby had survived this time around. Speaking of, if he looked closer at 'Tom's' scar, it looked as though it had just been caused by rubble, after all, Harry had seen a lot of injuries in his life, and during the battle of Hogwarts, there were a lot of people that had both curse wounds and rubble wounds, and that looked like a rubble wound to him.
At least it explained a bit about his situation, because he now knew that Voldemort had still sent the curse at him.

He was on the verge of falling asleep, after all, being held by Sirius was extremely comforting, when Dumbledore, McGonagall, Remus Lupin, and James Potter burst through the remains of the door.
"She's alive, I don't know how, but she has a pulse." Sirius said helpfully as James stared at Lily with a look of desperation. After seeing that Sirius was holding the two boys, and with a quick "Rennervate !" and then some holding and whispering to each other, both the older Potters were looking at (their?) children worriedly.

A chorus of "Are they Okay?" and "But how?" was interrupted by Dumbledore.
"I believe I know what has happened here, if you would all allow me to speak." He said with an authoritative tone, and a familiar twinkle in his eyes.
"You all know of the prophecy, and I believe that Voldemort had fulfilled his end, and marked the child as his equal."
"But who Albus? Which child did he mark?" Cried McGonagall impatiently.

"I believe it was both." He replied. " The prophecy directly refers to a 'Power the dark lord knows not', I believe that one of the boys is the 'Power' and the other is the equal, but only with the power, which means that it doesn't matter which boy is equal, because he is only equal with the other standing by his side."
'Well,' Harry thought 'The old man can justify about anything. I really shouldn't be surprised that this is his conclusion.' He supposed it made sense if no one knew otherwise, and the old man wouldn't want to separate children into possible favourites, but whether or not Dumbledore believed this theory was the question.

Harry felt himself being handed over to his mother, had couldn't suppress a small giggle at the whole situation, this was the breaking point he supposed, being handed to the woman he had wanted to know his whole life. Of course this small giggle looked completely normal to anyone looking at him, he was a baby, but Dumbledore looked at him oddly, and Harry met his eyes, trying to get across his situation, and get help in going home.

"That is odd." Dumbledore mused aloud.
"What?" Demanded James, worry replacing a look a pride.
"Young Harry has perfect Occlumency shields." Was the puzzled reply from Dumbledore.

'What?' Thought Harry, 'I'm crap at Occlumency, and it's not like I've tried since fifth year either!' Unless, in this world something else had happened, other than being hit by the killing curse, which would make sense, after all, how would he have survived if no one had died? But he was still a Horcrux, he could feel it. He could feel a familiar greasiness under his forehead, which he had only noticed due to the lack of it during the past few months. This was impossible! No one had died, how could he be a Horcrux again?

But Dumbledore must have noticed Harry's confused and panicked look, because he suddenly had a glint of suspicion in his eyes. That expression wasn't unusual on a baby, but he must have looked quite different to a regular baby. He had disturbing intelligence in his jaded eyes, and he was completely tense, prepared to run or attack at a moment's notice, something that looked quite out of place on a baby.

"Occlumency?! Albus, that can't be right, the magical required to do that would have to be a young adult's at the very least! You can't possibly be suggesting-"
"James." Dumbledore interrupted, "I am merely suggesting that something has happened, that no one outside this room may ever know about." He continued after a round of nods, "I believe that some of Voldemort's powers may have transferred to the boys, I don't know how it will emerge, but I will explain this to you all in detail in my office tomorrow morning, for now, I suggest we all go and get some much needed sleep. Soon word will be spread all over the country that Lord Voldemort has been defeated, and I'm afraid these boys will soon be emerged in the world of popularity and politics. Let them enjoy their childhood while they can." He finished.

"I suppose you're right Albus, see you tomorrow." Sighed Lily, looking very tired all of a sudden, "We can stay at potter manor, can't we James?" At his affirmative nod she took Harry downstairs and walked through the floo with Harry.
It was then that Harry couldn't fight sleep any longer, but as he drifted off, questions still raced through his mind.