It was another Sunday night for Vinny. An 18 year old bachelor at the crossroads of his life trying to figure out what he wanted to do, and was stuck in his room as his 15 year old baby sister Emily was having her weekly sleepover at their house. However this time was a little different. Their parents had gotten a small favor from some wizard and got something called "The Exchange Box". It had to be linked to two exceptionally related by blood such as siblings and then one sibling could offer a trade. Either a full "X for Y" or offer "X" then the second person could offer "Y" and then the first person could decide whether or not to accept. The siblings had linked to the boxes, and in a sense could now just make the boxes appear to them at will. So far in exchange for not coming downstairs at all Vinny had been using his box as a way to get food and take his trash away. As much as Vinny didn't like being FORCED to stay cooped up it was nice to have food delivery done for him.
Emily, Veronica, and Beth were in the living room munching on popcorn as they were starting to make suggestions about what to swap with the box. "I told ya'll he'd have to actually agree to the trade" Emily stated firmly.
"Hey, we'd just bet if he was wearing boxers or briefs... swap and we'd know for sure." Veronica playfully suggested
"My brother wouldn't have any interest in either of your worn panties." Emily stated putting in as much faith in her brother as she could into her words.
"...Could it be anything though?" Beth asked
"I Think so..." Emily said unsure
"...I'm a bit curious... think if I gave you my permission... you could put in that you trade my sex for his sex?" Beth wondered "innocently". "I would give my permission and consent." Beth added, Emily's expression was that of disbelief and thought her brother would say no for sure... Veronica's eyes were alight with speculation.
"Think that if your sex swaps so does your sexuality? or maybe it'll just trade Emily and Vin-"
"Shut up, I'll put it in alright?!?!" Emily said as she willed the box to input the trade "Beth's female sex in exchange for Vinny's male sex"
Vinny read the trade offer... He was a man who was firmly comfortable and somewhat proud of his masculinity. Still... All that was traded were physical objects. I trade your slice of pizza for my empty soda can, and stuff like that. Trading aspects... Was it possible? Their family knew a wizard if things went too south they could just ask them for help... Right?
"Must've been stunned by the offer." Emily said as she heard a *ding* and a checkmark on her swap box. Her eyes darted to Beth who was starting to grow a few inches and... was getting some muscles as she was becoming a MAN... It took a few seconds but Beth took his top off and examined his pecks and abs... Everyone knew that Beth had done some light exercises, but He was... Emily caught herself staring and was starting to curse herself for getting a bit turned on by one of her best friends... and then cursed herself again as Veronica was leaping all over Beth as she lost some chance to make the first feminine impression on the new guy.
Vinny's voice sounded weird to her ears, so she got some recording software up and said "Ara Ara~" and heard a soft lower pitched female voice come from the other side. She imagined she could do some voice acting for more mature women characters... Looking down she imagined she could probably do live action roles of some of those mature women characters as she felt busty and squishy... She hadn't expected the trade to actually work. But it did... With her hands massaging her breasts Vinny looked to the box and offered her sex for Beth's sex... and then hit an error... "User Emily doesn't have permissions to offer Beth's Sex"... Vinny felt annoyed at that, but it was technically correct. She wasn't exactly in a hurry to change back... after all it's not like Beth would just... decide to stay male like that right?