It was a moment he'd never forget. Half-Blood he might have been, but Severus Snape had known from very young just what a Wizard's body was capable of. From extremely powerful magic, to in very rare circumstances, carrying a pregnancy.

It had been one night.

A moment of sheer madness, only to return to the same normality come the morning. Severus had hated him for it, but then, when that flutter of life brushed against his own magical core, he felt a mix of wonder and terror. He had to tell him. It was one night, and the smug pureblood bastard probably wouldn't care, but Merlin he still had a right to know.

Even if Sirius fucking Black, was a complete prat!

Getting his attention was a task in itself. He and Lily still weren't speaking and Slytherin didn't make a habit of waltzing up to Gryffindor's for idle conversation. In the end a simple spell and note and he was set. It took an agonising week before the bastard got back to him of course, with an agreement they would meet at the Shrieking Shack of all places. Supposedly there was a way through from the whomping willow and he had graciously given instructions.

Paranoid, that was for damn sure.

On the night he went to meet Sirius, Severus was almost twelve weeks into his pregnancy. He had even noticed that morning, a slight curve to his middle and wasn't that bloody terrifying? Thankfully the wretched pregnancy sickness had finally ceased though the little monster within him had left him lighter by seven pounds. Had to be Black genes. Brat! Even as he thought it, he patted his middle affectionately.

Well past curfew, leaving the school was easy enough. It helped that the Slytherin rooms were in the Dungeon. It made sneaking out less complicated. This late, no one really monitored the grounds and if Dumbledore was watching, the man had a tendency to let things play out for his own amusement.

Careful not to trip over his own feet, his robes barely keeping out the chill, Severus stopped at the edge of the whomping willow. Finding the knot at the tree's base was easy enough and climbing beneath its roots, Severus was mindful of his middle.

It was musty within the tunnel. The walls damp with mildew, and pushing hanging roots out of his way, Severus carefully made his way along the carved path. Of all the places Sirius wanted to meet. Surely, they could have found a secluded spot in the school, or by the lake. But nooooo, let's make it as awkward as possible. Have him walk roughly over a mile. Bored, unnerved by the silence, the teenager just thought up potion ingredients to memorise to keep himself distracted and after what felt like forever, a light began to bloom at the end of the tunnel.

Relieved, Severus picked up the pace. Personally, he was going to throttle Sirius for picking such a stupid spot and he had barely stepped into the shack when a gut-wrenching growl filled his ears. Startled, Severus whirled around, ebony eyes widening in horror, because there, stood with its hackles up, was a werewolf!

Jowls wide, teeth bared, the animal lunged. Severus just about dodged and ran. There was no point in firing spells. Werewolf bodies were incredibly immune to nearly all magic. He was more likely to get killed in the attempt.

Heart pounding, a whimper escaping him when he heard the unmistakable sound of the werewolf tearing after him, Severus forced his legs to move. Muscles screamed in defiance, his stomach churning. Whether from fear, or the pregnancy he had no idea. All he knew was, he had to get away.

The werewolf couldn't move as swiftly as he could through the tunnel. Probably the only reason he wasn't already dead and when moonlight appeared ahead, the Slytherin almost wept with relief, dark eyes blowing wide at the sight of the entrance, where a frantic James Potter had just appeared.

"Fuck! Snape! Move!"

Hand outstretched, James watched the terrified boy run those final feet and when that slender hand fitted into his, he yanked, pulling Severus free just as the Werewolf caught up and away from the furious strikes of the tree's branches.

"REMUS NO!"

It didn't matter. The whomping willow kept the furious animal enclosed, the werewolf snarling in fury before turning and going back the way he had come.

Remus. Sweet Merlin, it was Remus Lupin! Severus had known they were up to something, but a werewolf. Not once had that crossed his mind! Shaking violently, sprawled on the grass, Severus paled drastically and turned just in time to vomit spectacularly. Tears burned, his throat like fire, the heaving making his head thud horribly.

"Easy mate, easy."

"Don't touch me!" Severus snarled the minute James laid a hand on his trembling back.

"Don't snap at Jamie, it's not his fault."

At that voice, Severus went rigid. Head snapping up, uncaring of the puke on his robes, or the tears tracking his rapidly flushing cheeks, the boy set livid ink black eyes on Sirius fucking Black! "You nearly killed me!" Us! Merlin, the baby!

Shifting guiltily, Sirus dragged a hand through his black curls in frustration. "Remus is tame enough. Plus, it's hard to catch anything in the narrow tunnel. You'd outrun him."

"Merlin's pants, Sirius!" James hissed.

"It was a prank, Jamie…Don't get your knickers in a twist!"

A prank? Severus sniffled, wiping furiously at the tears that were determined to fall. The idiot bastard could have killed him and didn't even see that! Getting up, his legs protesting a little, Severus stumbled, snarling angrily when James went to steady him. The Gryffindor had enough sense to back off and refusing to look at the traitorous bastard Black, Severus turned to head back to the school.

"I thought you needed to talk to me?" Sirius called irritably.

Closing his eyes, fresh tears blooming, Severus resisted the urge to curl up sobbing. "N-Not anymore." He forced out and kept on walking.

The incident was brushed under the rug. Dumbledore made damn sure of it. Severus was silenced. Unable to tell anyone about how Sirius had very well nearly murdered him and by extension his own child!

Five months later, having hidden his condition with great difficulty, he was gone home for the summer much to his misery and by the time he returned for his final year, there was no baby to speak of and Severus' gave into the desperate despair tearing at his heart.

-SING-ME-HOME-

30 years later…

Pinching the bridge of his nose, Shota Aizawa tried to ignore the headache irritating the hell out of him. The training exercise had gone spectacularly to shit, thanks to the odd misplaced Quirk and since the coffee machine had died this morning, he was running dangerously low on enough caffeine to keep him sane. It didn't help his number one Problem Child was acting strange, even for him. His face pinched and head clearly thumping worse than his. For the most part, Izuku Midoriya usually did well against these exercises. But today he had so far made six— Ouch! —seven mistakes, that were going to have Recovery Girl in a right snit.

When seven became eight, Aizawa called an end to the exercise. It took all he had not to rush over when Izuku landed and nearly ended up splat on the ground. There was a subtle tremor to his movements and a flush in his cheeks. Irritation gnawed at him, because clearly the stubborn brat was sick and had said nothing!

"1-A, clean up any mess you've made and head back to the dorms! Midoriya, Bakugo, Shinso! Follow me!"

Katsuki would usually protest, but even he noticed something was off with the nerd. Used to Aizawa, none of 1-A questioned their teacher. The three teenagers followed him without fuss, back to the dorms and up to the shared apartment Aizawa kept with his husband and youngest.

"Deku! Kats! Toshi!" Eri squealed in delight, dropping a thick red crayon, before clambering across a chuckling Hizashi and reaching toward them. "Big brothers!"

Grinning, Katsuki scooped her up, plopping her on his hip. "Hey little monster, you doing good?"

"Uh huh! I'm colouring with Papa!"

Aizawa smiled fondly. Once upon a time, it had been just him and Hizashi. But then on a cold night, when the moon was barely enough to illuminate a dank alley, he stumbled upon a sobbing six-year-old Hitoshi. The boy had been abandoned by his family for his Quirk and right place, right time, because adopting the boy was the most obvious option.

Nine years later and Izuku joined their family after his mother was shockingly killed in the crossfire of a Villian attack his first week at U.A. It had been just over seven months since her death, but he was a fighter and, on the days, it was too hard, he wasn't alone.

Katsuki was the most recent addition. From the moment he had gone after Izuku with such fury, their first few days at U.A. Nezu had started an investigation. The teen's behaviour was closely monitored and by the time the dorms were erected, it was clear that the fiery blonde was being abused. Aizawa would never forget Mitsuki striking him in front of them that day. Saw the way tears filled Katsuki's eyes, even as he used anger to push it away. Within the month, he was adopted by Aizawa and Hizashi. There were stumbles, but in an environment where it wasn't a case of constant fight or flight mode, Katsuki was adapting to a more mellow mood.

Outside of the bubble of 1-A, no one knew. But within 1-A and the privacy of their own home, they were legally Hitoshi, Katsuki, Izuku and Eri Aizawa, a happy family.

"You're home early."

Looking up at his slightly taller husband, Aizawa smiled at the sweet kiss pressed against his cheek. He was about to open up a whole lot of mother hen, but it was needed. "I think Izuku's sick."

Sure enough, Hizashi's head snapped around, green eyes locking on the shortest of their son's, taking in the flushed face, trembles, and glassy eyes. "Izu! Baby!"

Head snapping up, Izuku blinked, grunting when Hizashi suddenly swept him toward the couch and plopped him down. He was covered in a rainbow-coloured blanket and an old-fashioned thermometer popped in his mouth before he could even process what was happening.

"Is Deku sick?" Eri asked curiously, red eyes wide.

"Looks that way," Katsuki commented. "Damn it nerd, I was blasting you to hell! You should have said you were feeling like crap!"

With the thermometer in his mouth, Izuku could only shrug. Glad when Hizashi took the stupid thing out of his mouth. "I was fine, Kacchan…Just a little worn out…But in the last hour or so it's gotten worse."

"I'm not surprised," Hizashi winced. "You're burning up, baby. You temp is 103.4."

"Reckon it's flu?" Hitoshi asked. "It's going around."

"Maybe. Sho, we've fever reducers in the kitchen…could you grab one?"

Aizawa barely had a chance to nod, when Izuku let out a strangled cry, doubling over. "Problem child?!" Vaulting over the couch, he dropped down next to Hizashi, assessing the problem. "Kiddo! Talk to me, where does it hurt?"

"B-Burns!" Izuku whined. "F-Feels like I'm on f-fire!"

"S-Sho! He's getting warmer!" Hizashi spluttered.

"Damn it! Kats, Toshi, get Eri out of here! I don't know if he'll lose control of his Quirk."

Nodding at Aizawa's order, keeping a wriggling Eri close, Katsuki bolted for their parents' back room, Hitoshi on his heels. They were barely clear, when Izuku let out an inhuman scream of agony and raw energy exploded from him in a burst.

-SING-ME-HOME-

Slipping his feet into his shoes, Dumbledore shifted his tired body and shook off the dregs of sleep. Even with the heating charms, the cold of November was creeping in, making his old bones ache. They were coming steadily closer to the first task. The tri-wizard tournament, creating some stress with whoever had entered Harry's name into the Goblet. It couldn't get any more complicated.

Of course, famous last words.

The sudden wash over his magic, had Dumbledore whirling around, eyes locking on an amulet sat on his desk, pulsing with a multicoloured light. "Merlin's beard!" He choked, in a rare moment of astonishment, before hurrying toward his desk.

The amulet was something he had charmed some years ago and it had a several siblings. He had one, and the others, he had given to friends…including Nezu.

He had met the odd animal some years ago on a trip to Japan. High up in the Hero world, Nezu was one of the rare few aware of the Wizarding community and had volunteered to chaperone Dumbledore. Of course, that was more to do with the fact that the devious animal wanted to know all he could about magic. During their talks, they even theorised that Quirkless people were probably made up primarily of magical people or Squibs. Which in turn, led to the amulet.

A simple bit of magic, and he created identical trinkets that could pick up accidental magic from one, while channelling through to the other. The point was to see if any magicals were going unnoticed. It wasn't even the only one he had given out over the years and yet not once had any alerted him! Each had a unique magical signature, so he knew it was Nezu, but where in Merlin's name had he come upon a Witch or Wizard in Japan? Their secrecy made Britain's look non-existent! Even in regard the muggle-born, so even giving him one had been a bit of a lark, because even he knew one going undetected was impossible.

Summoning his Patronus, Dumbledore relayed a message and sent the silvery Phoenix on to retrieve Severus. The grumpy potions master wouldn't appreciate it this early, but he was the one Dumbledore trusted the most.

As expected, Severus burst into the office minutes later, a scowl on his face. "What could you possibly need me for Albus at just barely seven in the morning? Some of us like having food in us before dealing with troublesome children who refuse to pay attention!"

"The amulet is reacting," Dumbledore explained.

Severus came up short, dark eyes widening in surprise. Dumbledore had once told him about the amulets, but they had never amounted to anything. "Where?"

"Japan."

"Japan?!" Severus spluttered. "Albus, they test children secretly on the day they are born to find those with magic and whisk them away if they show any signs. And no newborn would be displaying accidental magic! So, how would a child circumvent the system?"

Dumbledore winced. It was a testy subject, how the Japanese dealt with magic users. They believed magical children needed to be raised by magical families and took it upon themselves to intervene. Since Quirks had come to outweigh the numbers in recent years for Japan, such incidents in regards muggle-born children were becoming rare, but still, it was a child removed from their family.

"I honestly don't know and the fastest way to find out, is activating the amulets built in portkey."

Severus groaned. He was afraid of that. Pinching the bridge of his nose, he let out a rare profanity before giving in. "Fine! Merlin's balls! Let me at least have my classes covered. No doubt the little hellions will throw a party at my absence."

Dumbledore smiled, blue eyes twinkling. "Thank you, Severus."

Waving his thanks away, Severus stomped out to go retrieve Minerva and pack a few things. Something told him, it wasn't about to be a brief trip.

-SING-ME-HOME-

Nezu stood at the bed of one of his students, carefully watching his pacing parents and frantic siblings and had no idea what to say, because for all logic…this shouldn't be possible! Magic? Young Izuku had magic? And if the crater sized hole left in the 1-A dorms was anything to go by, it was extremely powerful magic.

Toshinori was at a loss next to him. Unaware of magic, but knowing it wasn't One for All at work either.

A fever still raged in the boy, his vitals up and down and Recovery Girl didn't dare intervene, when she had no idea what was causing it. Nezu doubted it would have helped and agreed, it ran the risk of making it so much worse.

Every now and again, the green sparks of One for All sizzled across Izuku's skin, followed by a minor wave of energy that disrupted the machines. Thanks to his talks with Dumbledore, Nezu had long since learned how to shield them from being outright fried.

"This is ridiculous!" Hizashi finally exploded, unable to take the waiting anymore. "Why aren't we doing anything? One of my babies could be…make it stop!"

"I can't," Chiyo said softly, feeling utterly useless. "I've never seen anything like it and if I don't know what's causing it, I could cause more harm than good."

"Moving him to another hospital isn't an option either," Nezu said, paw grasping the pulsing amulet in his pocket. Furious that no one had come yet! "The energy waves are causing too much damage and we've no idea if there'll be another one as severe."

"Damn it!" Katsuki snarled; red eyes narrowed. "There has to be—" Cut off by Nezu suddenly yelping and tossing a glowing stone on a chain, Katsuki moved to join his parents and brother, Eri gripped his arms. "What the crap?!"

With a burst, two figures in strange clothing arrived in a blur. The Heroes in the room were instantly ready to fight and defend, only for Nezu to stun them all.

"Albus! Thank goodness!"

"Nezu!" The one named Albus greeted jovially. "It's been a long time, my old friend. This is Severus Snape, one of my Hogwarts teachers."

"Oh! Well, a pleasure to meet you."

"Rat!" Aizawa snarled, drawing everyone's attention. "Explain, now! Because it better involve helping my son!" Luckily for all involved, they all could speak English.

Severus' gaze snapped to the man and his insides ran cold, because he was looking at the spitting image of Sirius Black, but with his eyes! His parents had never told him what became of the baby he gave birth to and yet…He had to know! Pulling his wand free, he cast a spell that would identify all the magicals and their family line present in the room.

"Familiam lineam et nomen revelare!"

When light formed into words above four heads, everyone froze in surprise. Over Izuku, lit up in bright green read.

Legal Magical Name: Cygnus Orion Black

Other name: Izuku Midoriya

Age: 16

Mother: Inko Midoriya

Father: Regulas Black AKA Hisashi Midoriya

But what was even more astonishing, was the words above Aizawa.

Legal Magical Name: Canis Equuleus Black

Other name: Shota Aizawa

Age: 30

Mother: Severus Snape

Father: Sirius Black

Even Dumbledore was flummoxed by that. When had they…? Severus would have still been in school and by Merlin's beard Sirius couldn't deny him, he was the image of the Gryffindor. He could sense the accidental magic coming from the child, but there was nothing from the man…he was a Squib.

"What the hell is going on?" Aizawa bit out, black eyes, pure Snape eyes, wide and locked on the words above him. "Severus is my…but he's…what is this?!"

"I think, it's best, we all have some tea and a chat," Nezu suggested calmly, just as shocked, this was certainly turning out to be a surprising day.