Greg was your average 17 year old. Fairly average build, dark hair, blue eyes. Greg ran track, but was not otherwise much of a jock. He liked videogames, hanging out with friends, daydreaming about cute girls at school, typical guy stuff.
Today, Greg was more excited than he had ever felt before. In his hands was something he had been waiting for months to arrive. The Chronivac! He had heard about it online and it intrigued him so much that he spent weeks trying to track one down. He finally found one through some shady website, and it required around 3 months to actually ship! But sure enough, here it was. Greg had always wondered what it would be like to be able to change anything about yourself...or anything about other people!
Greg ran to his room, hooked the device to his computer via the USB port, and fired everything up. The graphic interface for the device was so simple, and yet had a ridiculous amount of options. Greg was still a bit skeptical that such a thing could really exist, but then, the emitter on the device scanned the house and found that he, his younger brother Mike, and Mike's friend Brian were present! It already knew their names and their profiles came up along with his own! The thing actually worked!
Greg scanned the profiles of his brother and his friend. Mike was 15 and a bit more of a nerd than Greg. Greg used to pick on him when they were younger, and he still did sometimes. Mike had sandy brown hair, blue eyes, and was lean even though he didn't play many sports. Greg saw the profile of Mike's friend, Brian, as well. Brian was also 15 with black hair and brown eyes. Brian had a bit more of a muscled body than Greg, as he spent far more time working out.
The profiles were very detailed for each of them. Greg realized with a chuckle that they even gave parameters like penis size and sexual orientation for each of them! Greg saw that his profile had a 6.6" penis size and "straight" orientation. So far correct, Greg thought. His brother had a 5.8" penis (not bad for a 15 year old, thought Greg) and was bisexual. Greg had no idea his brother was Bi! Brian had a 4.7" penis and was also straight.
Greg scanned some of the options along the side of the screen. There were options for all types of animals, including what % of the animal you became. There were options for changing age, changing size, changing gender, or changing any body part. There were options for inanimate transformations too, where you could choose any object (including body parts!) to change into. There was also a whole array of options for mental changes. You could make someone obey all your commands, or think they were an animal, or be uncontrollably horny! There were buttons for executing a random change within a given category, or even a button for executing a random change across all categories. Greg couldn't believe all the possibilities.
Greg couldn't help but grin. Now, the only question was - would he change himself first, or change something about Mike or Brian (or both!)