The year is 2XXX, War and disaster ravaged the global population cutting it on half. Underpopulation on such a scale collapsed several government and put several large continents severely critical. 

With such a problem, the governments of the world decided to pull their resources and joint forces, surrendering their petty disputes and opportunistic tendencies for the survival of the human race. Hence the United Nation of Earth was born, lead by remnants of surviving global superpowers in charged of the time.

Research was heavily focused on increasing the global birth rate through any means no matter how immoral or against various religion, be it cloning, cybernetics and robots or human alterations.

Females were primarly targeted, used in gene animal splicing and body modification all to make them more appealing and in turn more likely to breed.

Of course, this unethical experimentation is received by protest of the world. Clones and spliced humans escaped from one accident to the other. Only to end up as prostitutes without purpose of living...

All that info came from the Info Kiosk from where your portal appeared. Right next to it is a large futuristic building, literally called the 'Red Light District.' Written on the neon sign.

You get the gist of the place, as inside there roams various woman, all dressed in varied colorful skimpy clothes revealing their more than humanly possible assets as they sway, wobble and jiggle by simply walking around. Those women had different animal eats too, mixed with robotic limbs and colorful tattoos to match them.

You gulped, this places is intimidating. It's to be expected when coming into another world in the future no?

Well, better late than never. You decided to head inside and speak with someone in the receptionist table. An Android with a monitor for a head greets you with it's robotic arms.

"Good evening sir. Have you made an appointment or would you like to hire now?"

You told him your new here.

"Ah, a new customer. In that case we have a special package for first timer here. Before we proceed, payment must be made in advance. Luckily your tool is already registered to a VIP Permanently free packaged, wonderful."

You looked at your shrink-ray. What did he meant by that?! Did somebody else had this shrink-ray. You were glad you didn't have to pay at least...

"Would you like our beginner of one? Or a Harem pack of you had done this before?"