Dream Machine
You are hired by an eccentric scientist to clean and organise a storage facility containing all his experimental tech. After a few hours of tedious work, you find a hat like device labeled "Dream Machine" and put it on your head.
You are transported to a blindingly white room and you quickly acknowledge a note in your hand.
It reads,"Hello, User! You can create anything you imagine and it will be simulated however you like. Try imagining an apple, and have fun!"
You imagine an apple in your hand and in place of the note is an apple. You take a bite and it is indistinguishable from reality. You suddenly realise the pornographic potential of this room.
You want to have sex with a:
After you take the helmet off and think about what just happened, you realize that the girls are not just like dreams, but they are real girls and you are their dream. They also are girls that you know, or at least have seen, in real life.