Stray

This is a Gangsta AU set in modern day America.
Twilights are still widely despised by the majority of humans, and are being used as weapons by the mafia and the military alike. Now, a feared and malicious group of mercenaries are lurking around New York, the city Worick Arcangelo moved to after the death of his father.
One day the man discovers an injured young boy in an alley and decides to take him home and fix him up, looking after him out of the kindness of his own heart, and unwittingly changing his life forever.