Chapter Text
When Hizashi told him that a mutant quirk child had been abandoned on a street, Aizawa knew that meant ‘I’m using my foster care license, this kid’s coming home with me, prepare a room for him’. What he didn’t know was that ten years on, that child would still be living with them, only as an official member of their family this time. But watching the green haired demon jump around the room in excitement while his husband tried to calm him down, he couldn’t be happier with the way things turned out in the end.
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Ten years ago…
Izuku grumbled in pain when he woke up, his shoulders aching and head pounding. He reached a hand up, placing his palm against his forehead to try stop the pain. His mother’s voice called from his living room, and he began to slowly move out of bed. When he stood up though, he almost immediately tumbled over, his balance completely thrown off. He extended his arms to the side, and a soft flapping noise sounded out as something curled into his vision.
Midoriya looked down to see a tail sticking out his lower back, the spiked end of it waving dangerously. He spun around, looking at his bed to see the bedsheet almost in shreds from his tail. His back felt heavy, and when he moved his hand back, he came in contact with leather, and a shudder went up his spine as the sensitive new wings trembled. When he moved his hand to brush through his hair, he was stopped by a set of horns on the top of his head.
“Mum?!”
Izuku called to his mother as he went to the mirror, staring at his form in shock. On his cheeks where there were once freckles, he had small patches of dark emerald scales, glinting in the light from the window. His sclera (white part of the eyes) had turned black, making his green pupils stand out even more, almost like they were glowing. He looked at his hands, his nails were sharpened into claws.
“Izuku, are you oka- What the fuck?!” Inko Midoriya walked into the room, eyes wide in horror. “What the fuck are you?”
Midoriya stared at his mother, a smile on his face.
“My quirk came, mum!” Izuku turned and grinned brightly at his mother. “I’m a late bloomer mum, my quirk is here!”
“...look like…”
Izuku cocked his head, not having heard his mother properly. “What did you say mum?”
“You look like a monster!”
Inko screeched at her son, staring at him in disgust. Izuku’s face fell before twisting into pain, and the boy let out a scream of pain as his mother used her quirk and pulled on his tail and wings, dragging him out of his room.
“I didn’t raise you to become a monster!” Inko tugged open her front door, her quirk cracking something in his wings and he shrieked, a flood of pain filling his mind, dulling everything else he could feel. Tears poured down his face as he vaguely registered his mother throwing him onto the floor outside the apartment, his yellow backpack landing next to him with his notebooks and some clothes and water.
The sound of the slamming door drew him out of his pain, and he writhed on the ground, clinging to the bag in front of him as he tried to get to his feet, stumbling into the railing. He let out a quiet sob before he dragged his feet along, not wanting to be anywhere near his house right now, not when his instincts were screaming ‘ run, run, RUN AWAY ’.
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Hizashi Yamada normally does his hero patrols during the day, seeing as he was a limelight hero. He’s always worn special hearing aids that negate the volume of his quirk, preventing any damage to his ears when he uses it, but they also help enhance his hearing, letting him hear further than the average person. So when he heard an angry shout followed by a pained screech, he immediately hurried over to the apartment it came from, looking at the building in concern.
When a door slammed open on the third floor, his gaze flicked over to it, watching a woman throw something onto the ground outside her door. Green hair peered over the top of the railing, and Hizashi immediately rushed up, hearing the child sob once before going quiet.
As Hizashi reached the stairs to the third floor, he saw the child beginning to stand, one of his wings being held up crookedly. He hurried up to the stairs, but not before the child began trying to go down them. As the boy began to tilt over, tripping over his own feet as he clutched a bag, Yamada opened his arms, letting the boy slump against him.
Now that he was closer to the child, he could clearly see his features. Hizashi could immediately tell that the wing had been broken, and he held the child tighter when he let out a sob. He threaded his fingers through green curls, softly scratching next to his horns like he was a small kitten.
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Izuku could feel warm arms enveloping his body, and he shuddered, sobs making their way out of his throat. He could hear a man gently shushing him, cooing at him lightly while hands stroked his back. Midoriya practically melted as fingers scratched his horns, the soothing warm hands helping distract him from the pain, and he closed his eyes, leaning into the stranger.
“...bringing home a child…” The stranger’s voice sounded oddly familiar as he spoke into a phone. “...Chiyo… he needs help… foster license…”
Hizashi watched the child in front of him carefully, feeling him start to slump against him. A tail swayed behind him, and the blond watched as the spikes on the end relaxed, turning into an innocent bush of fur. He quickly picked up the boy, making sure not to hit his wings and began heading back down the stairs. As he left the apartment building and headed back to where he left his car, he felt the boy’s tail curl around his waist, lightly clinging onto him and not letting go.
Izuku could feel the weight of sleep beginning to weigh down on his shoulders, so he let himself close his eyes, being rocked to sleep by the gentle movements of the stranger. Hizashi took one of Izuku’s hands into his, softly rubbing at the patches of scales spotting the child’s skin.