"What do you mean, big brother?"
"You really think I'm just going in there alone? I don't know how this transformation gobbledygook works. What if I start turning pale as a ghost right in the middle of class?"
"Even so-"
"Look, there's even a setting for males. Just pose as my brother for one day. Here, I'll even give you a name--Mandi."
"What's that short for?"
"Does it matter? That's pretty much what everyone'll call you anyway. Now take your clothes off. I'll start the process."
When it was all said and done, Mandi took a look in the mirror at himself. He now had a muscular, brown-skinned body with sculpted facial hair, the exact opposite of what he had been before. And his cock was way bigger...
Priya pinched him. "Focus. Put these on. We're late for school."
At the sign-up table for the cultural exchange, they met Toby, who was overseeing the program through his position as president of the Asian Students Association. "Welcome! What are your names and how come I've never seen either of you before?"
"I'm Priya, and this is my brother Mandi. We just transferred in, so that's probably why you've never seen us. So what exactly are we doing in this program?"
"Well, our upcoming event is the Dance of Nations. Everyone who signs up gets an invitation to the performance, but they'll also be expected to write about it in our club's yearbook. Does that sound good?"
Later that week, the dance was held in the school's auditorium. Toby insisted on sitting with Priya, who he was understandably attracted to.
"So Priya, mind telling me a little about yourself?"
"Oh, there's not much to tell-" She felt Toby's hand caressing her back, and grabbed his wrist.
"Hands off, jerk! You want me to call my brother over here?"
"Sheesh, I was just playing. Later, slut."
With that, Priya ran out of the theater. Mandi followed, and found her crying her eyes out in the bathroom.
"What's wrong, little sister?"
"That dips hit Toby. He tried to touch me, and then he called me a slut."
"Why, I'll-", and then Mandi stopped. Instead, he pointed at something.
It was that Priya felt something peeling on her back. When she felt it, she was horrified to find that it was her own skin.
Mandi panicked, and tried to push it back into place, but it was no good. Priya's entire body, including her face, hair, and clothes, just slid right off and onto the floor like a rubber suit. Underneath, Jenny, her red hair loose from its braid and her pale frame covered with sweat and stink, lay there naked, vainly trying to cover her genitals and tits with her arms.
All Mandi could do was smile. "Looks like the transformation is over. I doubt I have long before I shed my skin too." He nevertheless managed to stuff Priya in his bag, picked up Jenny, and raced home before anyone noticed.
As he predicted, it took less than a minute for Mandi to lose his chiseled features and gorgeous frame. Jeff found his old clothes, while Jenny had to content herself with an old shift.
"Well, now what? We don't have any research, and now we have to dispose of, of whatever these are." He said this as he picked up Priya, who now felt like one of those cheap disguises from an old spy movie.
But Jenny wasn't listening. Instead, she grabbed Priya and fit her entire head over her own. To Jeff's surprise, her features looked 100% authentic.
"I think my mother has some of the plastic stuff she uses to store her old dresses. Let's keep Priya and Mandi around for a bit. They might still be...useful."