I'm looking for a yaoi that I read a few years back. I'm gonna say that it was an old-fash...

I'm looking for a yaoi that I read a few years back.
I'm gonna say that it was an old-fashioned manga because of the art style but I'm not sure.
What I do know is that it was a sci-fi genre kind of (?) and that it started off in a world where there are human-like sex droids where if they don't take a certain pill after a certain amount of time they turn into a puddle and die.
And you see this happen in the beginning with a different sex droid after the customer had sex with him too much and wouldn't let him take the pills.
The main character is the Uke where he's one of these humanoid sex droid's and he wants to be free and see the world. He meets the Seme who tells him that he's gonna free him but instead sort of kidnaps him and uses him for money to get food and housing but along the way he starts to reciprocate the Uke's feelings.
And in another town they meet this doctor who has one of these humanoids as their partner (real soft guy with long hair) only they don't have a whole lot of time left and then later on you read that the doctor's partner died. And the doctor becomes some sort of resistance leader and is trying to find a way to bring his partner back to life. He kind of feels resentment towards the Seme when they meet again because the Seme still has his partner alive.
Then I remember that the Uke is a special kind of sex droid and that he doesn't need to take pills to survive because he was top-quality or something. He's a special case.
And the Seme is fighting to get his Uke back because the company who makes the sex droids took the Uke back and is keeping him in a secure place.
I don't know the name nor the author.
Please help D: