Joe had set the chronivac so only he was aware and reality wouldn't change. He figured this should give an interesting sight.
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. His waist thinner, her hips a little wider, breasts developing into A-cups, and the newly feminized girl's hair hadn't even grown at all.
"Oop, I think I need to redo my trunk's knot." Ken said in her new voice. Joe didn't hear what they were saying through the window, but he wasn't that excited by the new Ken. She didn't have much of a booty, and her breasts were small enough that if he wasn't focused on the new girl he may not even see the girl as a girl. Joe went back to the chronivac, and after Joe tied the knot of her trunks in the pool and climbed back out she took a sharp breath in as her new sensitive breasts had brushed against the rough side of the pool.
Steve asked "You ok dude?"
Ken rubbed her boob and said "Think I may have scrapped my chest a bit."
Steve took a look at Ken's breasts as they expanded from tangerines, to apples, to melons and said "Well I don't see any blood or anything. Just wait a bit and the pain should just go away."
Ken sighed and said "That's good, would be annoying if my chest got cut." as her short brown hair started to lengthen to her waist. Joe was happy with the physical body Ken now inhabited. Joe just made one last change and then got started on Steve.
Steve said "Come on Kendra, Man up and just take the pain like a man." and beat his chest with his fist which squished into C-cups which were rapidly growing and slowly pushing Steve's fist further away from his torso till they became Z-cups. As he rested his fist down to his side Steve's body hair retracted, and then readjusted his trunks as his ass and hips grew.
Kendra asked "Body still growing?"
Steve sighed and said with a higher pitched voice "Must be, probably going to need some new trunks soon." Looking at Steve's face you'd think his face was now rather feminine. Joe would make a few more adjustments and leave Steve mostly manly. When compared to Kendra Steve's body still had his male body's height, muscles, and budge which was more noticeable in his trunks now that the trunks was also stuffed with a lot of squishy butt flesh as well. Still Joe didn't mind the bulge down there too much, as with every motion Steve's breasts jiggled and those nipples were fun to watch. Best part the woman and almost woman still acted like the men they used to be letting Steve just stare at their feminine assets that made his massive member hard, and they weren't trying to hide their jiggly bits, and no one was even concerned there were two girls with their milk jugs out. Steve was having a fun time with those two and started imagining if he should change anything else.