I remember reading a really good yaoi manga that had amazing art very similar to the art in the summit and you are so cool. One of the main characters was a male prostituite with shoulder lengh black hair. Does anyone know what this manga is called?

Not sure, but are either of these it?
Shounen Zanzou or Last Client

nope it's not either of those 🙁

come to think of it he may not have been a prostitute im have a feeling that either his name or the manga started with the letter Z...sorry if thats really vague

Itazura Neko ni Goyoujin?

I don't even know, I'm just throwing this in here.

There is a character with shoulder-length black hair. And the art is korean-styled. (manhwa-art, but was originally publish in Japan.) Since you didn't specify whether or not it was a manga or manhwa, but your art suggestions are manwhas.

I haven't read this, but they have black hair. ___
The Boy From the Moon

and I'm all out of other ones. XD

nope its not either of those and yea it was a manwha but thanks for trying

well there's Mede Shireru Yoru no Junjou but i think that was manga

Love Recycle?

wow i finally found it, it was LSD