Joe had set the program so that reality wouldn't adjust, but everyone would be aware of changes. He imagined this would throw in an element of chaos that would make things a little more fun as he jerked off.
Steve and Ken had been friends for a long time and recently graduated from high school they were having fun in the pool while their girlfriends Sara and June were tanning and chatting. The two couples were happy the four of them got together so well. Then Joe started up the chronivac and started targeting the guys. Between the two of them Steve was bigger and more muscular having been a bit of a football jock with his blonde hair, and Ken was more sleek and well shaved being a swimmer. The two of them were currently resting as they sat on the edge of the pool. With Ken's profile up Joe simply flipped the gender of the swimmer, and watched as the smaller man got even smaller. Ken early in his transformation said "Look like my trunks are a little loose, I'll redo the knot." and jumped into the pool, and readjusted his trunks as his waist got a little thinner. As Ken started climbing back up his feminization started finishing up as his balls shrank to nothing, his lean muscles shrank a little making it a little harder for him to climb out as his chest grew sensitive and pushed out into small A cups. Ken's bare breasts sliding against the rough exterior of the pool's ledge made her draw in a breath. "Think I may have scraped my chest a little." The now small woman stated with her somewhat androgynous voice. Steve looked with his swimming goggles on slightly unsure if Ken was different or if the fog was making him see things. Steve took off his goggles and was greeted to the sight of a small pair of breasts ballooning into solid D-cups that sagged a little. The pool water glistening in the afternoon sunlight with the pink nipples out in broad daylight. There was a moment where the two bros just stared at Ken's chest marveling at their beauty and pondering why they were attached to Ken's chest. Their girlfriends chatting as they tanned, the adults chatting and looking at their kids, and the kids having too much fun to pay attention. While he had a girlfriend Ken as a bit of a virgin, her first instinct when coming to her senses was to try to hide her breasts without touching them as she hovered her arms in front of her nipples.
Steve also came to his senses and said "D-d-dude? Umm-" and looked away as he realized what he was doing. "Let's get a towel over you." Steve stated pretty sure Ken's chest scratch didn't leave a cut on her magnificent chest. They ran over to the table where their girlfriends had setup. The issue for Ken though was Joe decided the best time to expand her butt and hips a little was when they were running leading Ken to trip, but Steve was fast enough to grab ahold of Ken before she could completely fall. Steve slowly let Ken down to the ground, and then Ken got herself up while breathing unsteadily. By the time she got herself up Steve had already gotten a towel and handed it to Ken.
Sarah and June had stopped chatting when Steve came over, and the duo was a little confused a bit till they realized the girl in one of their towels looked quite a bit like Ken. They got to a sitting position as Steve said "Um, so this is Ken... no idea what's going on, but maybe we should start getting going before we make a-" and Steve cut himself off once he started feeling a weight on his chest as Z-cup breasts sprouted from them. Sarah and June blushed a bit as they were flashed with the biggest pair of breasts ever. "Shoot, am I turning into a woman too?"
Ken from behind huddled in her towel said "Your hips grew as well..."
Sarah and June glanced to each other and nodded as they grabbed their big towel and wrapped Steve's top with it, and the cover was just enough to make it so his breasts were covered.
Joe in his room was starting to input a change for some of the girl's, but luckily for them they exited pool's premises and the chronivac's range before something weird would happen to them. Sure the parents thought that it was a little abrupt for teens to just walk out like that, and one wondered if they had always been 3 girls and 1 guy.