Read a manga quite a while back and cant remember the name, but remember some details:
Two main characters: thin, androgynous black-haired boy who was a former prostitute to 3 older men he referred to as "crows" and who had a weird relationship with his mother. Extremely lazy.
Other: blond haired more heavy set guy with a high sex drive who the other refered to as a "dog"
Some other rich ex in the whole story as well.
Black-haired boy looked like image below (i know its a different one)