Izuku was a very happy child. He had his love of heros, he had his wants and needs, and he was all in all, a regular one year old child. He loved his mom and dad with all of his tiny heart. And nothing would change that.

Well, almost nothing.

His quirk could, so it appeared.

...

The day Izuku's quirk manifested came too soon. Instead of age 4, he got it at age 1 year, 7 months. Far too early. The quirk itself was...unusual. When it manifested, His mom, Inko was in the kitchen, and his father, Hisashi was playing with him on the couch. Peek-a-boo , specifically. Between "peeks", it happened. Izuku's quirk came in, slashed Hisashi's palms, which had saved his eyes, and trashed the entire living room. Inko rushed in to see what the racket was and found Izuku, covered in a thin layer of his own and Hisashi's blood, with dark tendrils protruding from his back, cutting up everything in reach. One reached for her, and it cut her arm, missing her body narrowly. She ran back to call the police in a panic, and Hisashi slowly curled up to minimize the damage to himself.

Midnight and several officers responded, and midnight put the child to sleep with her quirk, earning a few minor cuts in the process. The officers collected a statement, gathering that Izuku's quirk manifested and caused the mess, before they all departed.

As the police shut the door, and Hisashi and Inko stood in the bathroom bandaging their light injuries, they silently agreed that they couldn't take care of Izuku. They knew they were lucky that they hadn't been seriously hurt. So in the dead of night, Inko kissed Izuku's forehead one last time, Hisashi hugged him one last time, and they left him in a box with a note explaining that his quirk was fairly hazardous, and they hoped someone could give him a home that they could not provide.

Sadly, the ones to give him that home were... Undesirable.

 "Sir, I think we found a perfect new recruit..."