trying to find bl name

i read a yaoi/bl that i forgot to save :<

I don’t remember the exact story but it was a black hair uke (older) and a purple/violet hair seme.

The uke picked the seme off the street corner by the seme and he had run away from his abusive foster dad. He also had some issues with controlling his anger against the foster dad and would have dreams about hurting him.

That’s all i remember pls help me guys ;-;