Little orphan girl (Kuroo T.)

Y/n's mother was abusive, and her father was never present in her life. Things became to much during a beating while she was cleaning the kitchen, and she snapped and stabbed her mother's neck. When she realized what she did, she burned her bloody clothes, and ran into the cold winter night, terrified of what she did.
She didn't think. She grabbed a random pair of pants and a shirt. She grabbed her jacket and ran into the night, not looking back. But leggings and a thin tee shirt can't do much to protect her from the cold.
She was 22 when she killed her mother by accident. She was cleaning a knife, and then her mother started beating her for no reason. Everything went black, and when she opened her eyes, her mother was dead, and she was covered in blood. She ran as far as her legs would carry her, before her adrenaline wore out, and the pain from her bruises and cuts caught up with her.
She passed out in an ally, hidden behind a trash bin. She walked for a while when she woke up, not knowing where she was going. She found a little money in her jacket pocket, and bought some food and water, but no matter. She figured she'd be dead soon anyways. She was walking in the middle of the night in the middle of winter, when exaustion caught up with her fully, and she passed out in front of a strangers house late at night.
But she didn't expect the stranger to be so nice to her.