A kindergarten student named Justin.
During lunch break, Jeff, Dan, and Mark, all came out on to the playground and found a young kid bullying the other kids into giving him their test answers.
"Hey, there's a bully right there, let's do it!" said Jeff, Chronivac in hand as he pressed the button to change Justin Tsukumo into Rei Draker.
At first Justin didn't notice anything until he felt his penis and festival's get sucked into his body and be replaced with a vagina. The next thing that happened was Justin got taller until he was 4'10" and his, now her chest expanded out to a soft DD cup and nipples expanded out to be big. After it looked like all the changes were made, her waist thinned exponentially and her butt grew to a big size. Her eyes glazed over as her memories and personality changed. The three friends watched as reality changed around them and Justin, now Rei, became their girlfriend, since it was December, Rei is Marks girlfriend, but the other people's friend.
Rei came rushing over to Mark, her boobs and butt jiggling alot, "Hi Mark, you wanna go to your house after school with Jeff and Dan?"
"Sure, sweetie. We just need to inform my parents" Mark said.
"thanks! You know I hate it when you call me sweetie though, so can you stop that?"
"of course." Rei replied, riding off on her skateboard. "See you at your house!"
"Why couldn't I think that she was Justin before once she was here?" Jeff asked
"that's because I turned on a setting called gilded personality, when people who are unaware aren't around, we'll be aware, but the opposite goes as well. Since Fri isn't aware that she was Justin, when she's around, we won't be aware." Mark replied.
"oh, that makes sense"