Jeff had a rather prevy thought when he was thinking about what he should become. He could become someone's boobs. He even had the option for it to be a slow change, so he could enjoy the sensation of basically becoming a rather defining feature of a girl.
Jeff went to work on setting the chronovac, activating the reality shift option and setting the change to take a few days. He also set it so he would end up as a nice pair of D cups. Something any man would want to stick their face into.
Of course he couldn't just changed into a pair of boobs. The rest of his Body had to go somewhere. He had set the chronovac to randomly assign other parts of his body to add the the mass of whatever it saw fit. Though most of it was towards the boobs he would become.
Hitting confirm Jeff suddenly found himself naked on a bed next to a naked girl without a pair of breasts, a sudden... but not unwelcome devolpement.