You and your long time best friend arive at your dorm room with the package. You had won a contest that you didn't even remember entering and now were the new owner of the latest Chronivac software. You load it onto your laptop and your friend pulls up a chair next to you to see what it does.
The two of you have always done everything together outside of bathing and sleeping. You are even taking the same classes. Your best friend, Logan, was already looking up information while you downloaded the files from the disk. "Woah, so this software apparently can make changes to things. It seems pretty cool."
The program finishes the installation and opens up the interface. "It says we need to select a target" you say. "Hmm, well, just use me for now. That way we will know it works or not right away."
You did as he suggested and then moved over. "Well if you are the gunea pig, then you can pick the transformation." "Sure, but turn around ok, I want it to be a surprise." You turn around and look at your phone for a few minutes. The you are told that you can look back again.
Your girlfriend is standing there, looking rather excited, but you can't tell what she did. "So, what did you change, Lauren?" You ask after you are unable to find anything different.
"Like holy fuck this thing is so cool! Do you really not notice anything different about me?" Lauren said excitedly while bouncing up and down a bit. Your eyes were honed in on her bouncing chest more than anything though. "Um, did you make your boobs bigger?"
"In a ways... you really have no idea, huh?"
"Nope, sorry." You watch Lauren turn around and make a few clicks. Before your eyes, your girlfriend suddenly is no longer your girlfriend, but your best friend who is now in a girl's body. "Woah what the fuck? Logan what did you do just now? And why did you make yourself a girl?"
"Ohh, so you can realize it now. Neat. I was just playing around with the reality adjustment feature. It is crazy strong I guess. And as for why I am a girl, no reason. I just felt like I wanted to try it out for a while is all. See how the other side lives, you know?"
"Really?"
"Yeah, you don't remember this, but just a moment ago, you thought I was your girlfriend too. Anyways, this thing works, thats for sure." Says Logan as he, now she, starts playing with her boobs. "You know... I don't mind being your girlfriend for a while, if you want me to be."
"What the hell man?"
"Why not? It will be fun. Then you can return the favor. I will even let you recreate my body so that I am your dream girlfriend even. It will be fun. Tell you what, we can swap each week on sunday night too. And since you won, you get the first week."
"Fine, but you better not regret this later." You look at the program and begin turning your best friend into your perfect, ideal girlfriend for a week. When it is all set to go, you made it so that the world remembered her as always being a girl and your girlfriend, but the two of you know otherwise. You also made her able to know how to live as your perfect, ideal girlfriend too. And you also added a minute delay and a slow transformation so the two of you could watch it happen.