Archive of Our Own ^beta

Chapter Text

The street was busy, a small box was at the side, mostly in an alley way, in side were a few litters of kittens, all mewling for food, attention and warmth. One kitten was much smaller then the others, it’s fur a soft green and curled, much unlike the others. He struggled to get up to his tiny paws, mewling weakly as his littermates stepped all of him, reaching for the humans who were fussing over them. People came and picked the stronger ones of the litter to take home as pets. But soon, just that small green kitten was left, mewling out in hope of being helped, but no one wanted a weak pet.
Aizawa Shouta, underground hero and teacher at U.A high where teenagers would learn how to be heroes, was heading home after dealing with his problem children of 1-A. He frozen when he heard a weak mewl, it took a few moments but he soon found the box with just the runt of the litter clawed at the box base, still too weak to stand, left fighting for it’s life. Aizawa was somewhat furious that someone had left the kitten to die, it was n secret the underground hero loved cats above humans.
“Hold on little one.” Aizawa lifted him up, the kitten mewled again, wriggling in his grasp, holding the kitten close to his chest, Aizawa hurried home to wrapped the kitten in a blanket. The kitten mewled lightly, and opened tired green eyes. He blinked and sneezed. Aizawa smiled, so cute. His two older cats, a female tabby and a large male Maine coon approached the tiny bundle. Aizawa watched quietly as his female tabby Jin, sat next to the kitchen and nuzzled him. The kitten mewled, his Maine Coon Takeo began to clean the kitten carefully. Pleased to see them getting along, Aizawa began to fill up Takeo’s and Jin’s bowls, before getting a syringe and a small bowl of kitten milk.
Feeding the kitten was easier then it had been for his other two, the kitten didn’t fight against his hold, instead, clawing closer to him as he suckled on the syringe.
“I’m home!” Aizawa heard his husband called out.
“In the living room.” Aizawa replied, Yamada Hizashi walked in his hero costume, his green eyes feel upon the small kitten
“Whose this little guy?” He asked
“A box was in an alley giving out free kittens, this little one was left behind. Clearly the runt of the litter, wouldn’t have survived the night.” Aizawa replied, Yamada sat next to him. The kitten finished the milk in the syringe and began to mewl for more. “Would you like to feed him?” Yamada nodded, taking the kitten carefully, and the syringe filling it up once more.
“Hey, it’s okay, it’s okay. Here you go.” Yamada chuckled as the kitten clawed his golved hands, mouth mewling until the syringe of milk was returned to him. “So cute, and looks like he has a quirk, due to his fur colour.”
“Yeah, that’s what I was thinking. I am going to wash and change and ring Nezu to get his say on this.” Aizawa stood up and stretched.
“Good idea, I’ll finished feeding this little guy.” Yamada smiled at the tiny kitten. Aizawa smiled at his husband softly and headed for a bath. Once the kitten was finished, Yamada rubbed his ears with his thumbs. The kitten was purring loudly, leaning into the touch. “You’re such a cute little one.” Yamada cooed. “Think you need a bath little one.” He added, taking the kitten into the kitchen, he cleaned out the sink and began to fill it with warm water. He began pulling out the special cat shampoo making sure it was safe for kitten. As he did, the kitten stumbled around the counter, sniffing everything he came across. Yamada chuckled as the kitten was clawing at the kitchen paper. “Come here you.” He lifted the kitten up, holding him above the water, dipping one hand in, he careful poured little water over the kitten. Seemingly unbothered by the water splashed on him, the kitten was looking down at the sink. Taking it as a sign to continue, Yamada began to wash the grime from the kitten. Aizawa came out as Yamada was drying the kitten. Jin and Takeo was sitting nearby, watching him care for the kitten.
“Seems like those two are ready to commit murder for the kitten.” Aizawa commented.
“They have been glaring at me since I started bathing him.” Yamada admitted, letting the towel fall around the kitten, done with drying him. The kitten stumbled out of the towel and on to the carpet. After gaining his balance, off the kitten went, a little to fast for it’s legs and he tumbled over. Jin jumped from her place and went to aid the kitten.
“We need a name for him.” Aizawa settled next to his husband.
“Um, any in mind?” Yamada asked
“I quite like Izuku.” Aizawa muttered softly.
“Izuku is a cute.” Yamada smiled, they watched as Jin picked Izuku up by the back of his next and carried him from the room, Takeo went after them. “And there goes most of the room on our bed tonight.” Aizawa chuckled, leaning against Yamada, Aizawa pulled out his phone and made a call to U.A’s principle, Nezu the first and maybe the only animal to have a quirk.

That night, Aizawa was held in Yamada's embrace, with plans on taking Izuku to see Nezu the next morning. Aizawa knew his class was going to kick up a fuss when they see a tiny kitten with him. At the end of their bed was Takeo who watched at the sleeping forms, as Jin was curled around Izuku. The kitten was curled up against the older cats chest. Ears twitching as he rested peacefully, Safe and Sound in a good home. The Pro heroes woke up the next morning with Izuku now longer by Jin, but curled up between them, purring softly from his new, favourite sleeping spot.

Chapter Text

Chapter Text

Author's note: I've got some more chapters for you all!! ENJOY!

The pen was remade. This attached to the wall so Izuku wouldn’t knock it over again, but it didn’t seem like Izuku would be trying that stunt again. The Kitten look pretty upset his escape lost, so Aizawa messaged Hizashi to bring some treats from is desk draw. That kept him quiet for a while, aside from the loud purring.

Lunch arrived, and the class got their lunches from the cafeteria, in bento boxes so they could eat in the classroom, to spend that time with Izuku, letting him run free in the class. Aizawa only joined them for a short time to see if he would eat so kitten food. Izuku drove his face into his bowl and ate hungrily, he even poured kitten milk into his drink bowl. Izuku was very happy, purring as he ate.

“So, if he has a quirk, what do you guys think it could be?” Uraraka asked.

“Could it just be his fur color?” Todoroki asked.

“Um… I heard that with animals, if they have a quirk it is expressed in a different way, him being green might just be the indication he has a quirk.” Iida said.

“How cute would it be if he had a quirk that could let him float?” Ashido burst out.

“Or with all that fluff, he could have a work that works with static electricity!” Kaminari suggested.

“He could have an intelligence quirk.” Shinso muttered. Izuku continued to eat, ignoring the fact the whole class was watching him.

“Maybe a food related quirk?” Sato chuckled.

“Strength… or maybe a transformation quirk. Imagine him becoming a lion or something!” Jirou grinned. “It has to be something awesome either way!” Izuku lifted his head up, there was some food around his mouth as he looked at the class they all cooed softly. Izuku turned away, licking around his mouth before taking a drink of his milk. Once done, he decided, now that he was free to roam, he was going to check out the class.

Katsuki petted the small kitten, Izuku purred happily, the angry human wasn’t so bad. His pets were nice, not too soft. Izuku reached up with his claws, catching the human’s sleeve. The human didn’t seem to mind when he took to play fighting, instead seemed to join in. Izuku purred happily as he growled, clawing the fabric and biting his fingers.

“You okay there Bakugo?” Kirishima laughed

“Fuck off, he puts up more of a fight then any of you assholes.” Bakugo snarled, Izuku growled in reply, gnawing on his fingers. “Gonna make you the most badass fucking cat ever.” Aizawa walked in, and saw his most explosive, even violent student playing with the kitten.  Deciding he had walked into some alternate universe and walked back out. He was not paid enough to deal with that.

~*~*~*~

Aizawa relieved when the end of the day came, Izuku was curled up asleep in his pen, the class left quietly, not wanting to wake up Izuku. Aizawa sighed, and looked at Izuku, his small body was curled up next to the teddy he clearly liked the most, he already planned to take it with them. Hizashi wandered in a little while later, he smiled softly at the sleeping kitten.

“Had a good day?” Hizashi asked, going over and embracing him.

“Hm. Tiring as always.” Aizawa yawned.

“You are always tiring, but you don’t listen when I say you are over working yourself.” Hizashi sighed, before looking at Izuku. “At least the little guy seemed to have had a good day.” Aizawa glanced at Izuku and nodded.

“A little trouble-maker, and now he has a fond spot for the class bomb.” Aizawa sighed. “This is going to be such a headache.” Hizashi chuckled lightly.

“So, it was a good day then? Let’s get the little guy home.” Hizashi smiled, Aizawa nodded.

“Oh, take that teddy, he is sort of attached to it now.” Aizawa warned. Hizashi chuckled, picking up the kitten and his teddy. Izuku mewled, annoyed with being so rudely awoken.

“It’s okay grumpy guts.” Hizashi said playfully, rubbing his belly. Izuku seemed to accept his apologetic belly rub and began purring. “It’s pretty easy to appease the beast.” Hizashi joked. Aizawa took Izuku, once again putting him in his scarf.

“I hope it stays that way.” Aizawa replied but hide his smile in his scarf as Izuku cuddled up against his neck, purring lightly. “Let’s get you home, okay Mister.” Aizawa said, petting Izuku’s head.

Jin and Takeo seemed happy to have the kitten back in their sights. The moment Aizawa put him down, Jin picked  him up, carrying him off. Izuku mewled sadly, Takeo took his teddy and followed after Jin.

“They’re so cute, like a little family.” Hizashi cooed. Aizawa couldn’t help but agree. Jin was a rescue cat, rescued from a terrible breeder, all her kittens taken and sold. She had be spaded after her rescue, so there was no chance of her having anymore, so having Izuku in the house gave her the chance to finally raise a kitten of her own.

“Let’s make dinner.” Aizawa said, heading to the kitchen. Hizashi chuckled lightly, and followed after him

~*~*~*~

Izuku was cuddled between the two big cats, it was so warm. He was quite comfy too. Jin cleaned him softly, it reminded Izuku of his mother… before a bad human had taken him. He missed her, but she would have been happy with him being safe. He remembered a bit before he left, what the people were saying. They were a failed litter… no quirks… quirks… what even was a quirk? Were they important? Izuku stretched, he didn’t know, and his mother said over and over he was too young to understand, so maybe it would make more sense when he grew up and was bigger. Izuku yawned, before there was a call from the kitchen.

“Dinner!” A human called, Jin picked Izuku up and carried him as he yawned. Yeah, it would all make sense when he was older.

Chapter Text

Izuku woke some time during the night, cuddled into the fur of Jin. He yawned and stretched lightly, before sitting and looking round. The humans home look so different at night with no light. He wandered away from the soft fur of his second mother and prowled into the room where the humans slept. He looked up at where they were lying, Izuku huffed and crouched low. He jumped up at the bed and dug his claws into the soft blankets. He panicked for a moment as he just hung there, before he climbed his way up. Izuku shook him himself down and padded over to the two humans. He liked them both, they were unlike the humans that had him first, that took him away from his Mama.

Izuku froze as the humans moved, he looked up to see the dark haired one peeking down at him tiredly. Izuku  crouched low, hoping he would decide just to leave him be. He mewled as the human lifted him up and placed him closer between them. Izuku looked to the human curious, he looked so tired, but he was smiling softly. Izuku purred happily, cuddling closer, and the human didn’t seem to mind. He settled down, comfy, and to the nice sensation of having his head lightly scratched.

~*~*~*~

Hizashi was the first to wake and smiled softly when he found Shouta sleeping with Izuku cradled to his side. He huffed lightly, he wasn’t surprised, the kitten seemed smitten with Shouta when he was close. He always knew Aizawa was a cat man, cats seemed to love him, even the most difficult ones.

He noticed Izuku move, the kitten stretching and yawning, Hizashi had to resist the urge to take a photo. Izuku blinked up at him, mewling softly.

“Yeah, morning to you too buddy.” Hizashi reached over and scratched his head lightly. Izuku began purring happily. “You are so cute, want to have breakfast or want to cuddle with Shouta some more.” He watched with a little surprise as Izuku seemed to look at Shouta curiously, before cuddling closer to him. Hizashi smiled. “Alright, you stay with him a little longer, you’re a clever one.” Hizashi gave him one last head scratch before getting up.

Izuku watched him leave before walking over and on to the pillow and looked at the human’s sleeping face. Izuku placed a paw on his head, before removing it quickly. The human didn’t wake up, Izuku’s fur bristled lightly as curled up against his head and nuzzled him happily.

Hizashi peeked in to the room after exiting the bath and smiled softly at the sight. He definitely needed a picture of that.

~*~*~*~

Izuku wasn’t the happiest once he was placed back into the pen in the human class, but he had that new toy back. He really liked the giant teddy the girl human made him. But he didn’t like being stuck in the surprisingly soft cage. Izuku curled up in the corner, clawing his teddy close, pouting about his situation. His human Shouta had promised to be back, he went somewhere, Izuku wasn’t sure where he had gone, but decided to trust him. His ears twitched when he heard footsteps and looked up, it was a young human, one that had been able to translate him the day before. Izuku darted from his corner mewling. Causing the boy to stop and kneel, reaching and petting Izuku’s head.

“Good morning.” He said softly, Izuku purred happily. “My quirk lets me speak to animals, so, I can understand you.” Izuku’s ears twitched again.

“Quirk… the white coat humans said that a lot.” Izuku mewled. “What is a quirk? Is it food?” The boy blinked in surprised.

“No, a quirk is a power. Um… I am Koda, my quirk is ani voice… what were those white coats looking for?” Koda frowned. Izuku began to tell him everything about his mama and how nice she was, and how she took care of him, and how of the white coats would call him and his litter mates failures, no quirks at all, and how it all led to them being taken away from their mama. Koda listened with a concerned frown.

“Koda?” Aizawa asked as he found the boy listening to Izuku’s meowing. The student looked up at him. “Is everything okay?”

“Sensei… I think Izuku is a product of a breeding program to have more animals born with quirks…” Koda frowned standing up. “Everything he has told me sounds like it, he and his litter were taken away because they lacked quirks.” Aizawa frowned. “Sir… his mother is still with the scientists… I want to rescue her…” Aizawa looked at the quietest member of his class, he hardly ever spoke, but he was right… if there were scientists trying to breed animals with quirks… well, Nezu would be involved immediately. Aizawa glanced to Izuku who watched them curiously, before mewling. Koda turned to him. “We’ll save your mom and make sure you’re together again.” Izuku’s mewled happily.

“I will bring it up to Nezu, he will want to know, and will be able to plan from this point. But, chances are he will need your help too.” Aizawa said, Koda nodded, turning back to Izuku. The kitten happily playing with him. 

Looking back, Aizawa noticed how Izuku seemed more responsive then other cats, more… he didn’t want to say intelligent, animals were naturally intelligent in their own ways, but Izuku almost had a human like intelligence. He would need to bring this up to Nezu as soon as possible, and he knew there was no point in waiting. Aizawa stepped out of the class and walked towards Nezu’s office, missing a few more members of 1-A that were just arriving.

“What was that about, he looked like someone kicked Izuku?” Katsuki stormed into the class room, Koda jumped a little.

“Oh… um… just, Izuku may have been the product of quirk breeding in animals… I-I want to rescue his mother and reunite them. He is going to speak to the principle.” Koda explained, Katsuki scowled, and looked at Izuku.  The kitten looked up at him with bright eyes.

“Bet she was a right warrior.” Katsuki muttered softly. “If he is as strong as his will.” Katsuki went to his seat. Koda was a little surprised but smiled. Maybe Katsuki wasn’t that bad.

Chapter Text

“Aizawa good morning.” Nezu greeted as the underground hero entered his office. “You seem concerned.”

“My student Koda spoke to Izuku this morning, and… well, we may have a secret lab experimenting and breeding animals to hope some will be born with quirks.” Aizawa said, watching the mammal before him freeze. Nezu glanced at him.

“Is that so? Explain.” Nezu said. Aizawa retold Koda’s translation of Izuku’s story, Nezu was silent, his gaze cold and calculating. It was unnerving, but Aizawa understood how this would be something of major concern to the once caged creature.

By the time Aizawa had done, Nezu nodded. He sighed heavily, Nezu fought back some dark memories that tried rising up.

“Principal?” Aizawa asked

“It sound a Quirk breeding program.” Nezu spoke sourly. “I remember the scientist who messed with me discussing possibly having a few set up to see if they could get more animals like me… I, also recall calling them white coats during my captivity.” Nezu frowned, Aizawa bowed his head.

“sorry for bringing up some old memories.” He apologised.

“Not your fault. Thank you for informing me about this, I will look into it. This is something we will need to stop as soon as possible.” Nezu nodded.

“I’ll leave you to it then, if you need Izuku or Koda at all, I made him aware you may want to speak to him about this.” Aizawa added.

“Thank you Aizawa.” Nezu smiled softly, he waited until the hero left, before turning to his secondary laptop, his own. He never trusted the computers of U.A, you had no idea when the commission was looking, and Nezu wasn’t their biggest fans in the slightest. And he didn’t want them knowing he knew how to hack and cover his tracks.  He had a lot to do…

If they were trying to breed animals with quirks… there was a high possibility that Izuku’s mother had a quirk herself, maybe even his father… Nezu knew there could be a chance the commission were involved, and they would have tried to cover their own tracks. But the commission were messy with everything they did, they were over confident, and that led to easily missed mistakes.

Nezu worked silently as he hacked into all nearby scientific labs, giving him access to the camera systems. He began to painstaking process of all through all the cameras of one site at a time to either confirm they are nothing bad, or suspect. He had no idea how long this was going to take…

Back with 1-A, Koda had told the whole class Izuku’s story, and they all wanted to help reunite the kitten with his mother. Aizawa let them discuss it all, a few class mates thinking of plans or theorising on where it could be, and the end goal.  Some of the class had some good ideas, he was surprised at Katsuki’s response as he growled out that if they can get an animal like Izuku with a quirk, imagine a dog or any other pet, how people could train them to be weapons. He had a point. If that was the goal, then Nezu had to find them, so they could act quickly. Aizawa watched Izuku as he happily sat on Todoroki’s left shoulder purring up a storm, whilst the teen looked nervous and worried. He knew the class would want to be a part of it, and there was little chance of them taking no as an actual answer.

~*~*~*~

Aizawa ended up bringing Nezu Izuku around lunch time with something for the principal and for Izuku to eat, before leaving. Izuku, seated on Nezu’s desk, watched as Aizawa left with a confused mewl, before he turned to Nezu, watching him curiously.

“It is good to see you again Izuku.” Nezu smiled. Izuku mewled happily wandering over. “I am sure I will be able to understand you, we animals must stick together after all.” Izuku watched him silently.

“Like me?” Izuku mewled, Nezu smiled.

“Maybe.” Nezu nodded. “We can’t be too sure just yet. Animals don’t have such unique colouring such as yours.” Nezu petted Izuku’s head, Izuku purred happily.

“Mama was the same, she was nice, but my fur is mussed up.” Izuku explained, shaking a little, the small curls of his fur bouncing.

“I see. I am trying to find your mother now actually.” Nezu said, watching as Izuku’s ears picked up. He bound over and climbed on to Nezu’s head.

“You found Mama?”  He asked, mewling excitedly.

“Not yet. But you may stay with me whilst I continue, you can help me if you see anything you recognise.” Nezu smiled, Izuku happily curled up on Nezu’s head as he continued looking through camera footage, knw9ing the kitten was watching the screen intently.

They sat like that for a long while, Izuku only moving to eat and drink, before going back to his place to help continue looking. As they moved from one location to another, Nezu’s heart was sinking. He had assumed they may have been nearby due to leaving the box of kittens. But maybe he was wrong… He would need a lot more help to check every location in Japan…

“Stop!” Izuku meowed, jumping down to the screen, Nezu moved his paw as Izuku got close to the screen, sniffing it lightly,.

“Is this the place?” Nezu asked

“Maybe…” Izuku replied sadly, Nezu moved to the next camera and froze. Cages… so many cages. Izuku’s fur puffed up and growled, as a man came into the shot, carrying a green, sedated cat. “Mama! Mama!” Izuku mewled out, pawing at the screen.

“Hold on little one.” Nezu picked him up. They watched as Izuku’s mother was placed back into a cage, and the man turned, facing the camera and Nezu took a screen shot the scene, and made note of the co-ordinates. “I thought so… once scum, always scum…” He growled out, Izuku looked up at him. “That white coat was there… when I was also in a cage…” Nezu growled, Izuku cuddled into him. “We will put a stop to him for good this time, I’ll personally make sure of it.”