Chapter 3: At the Library
The next day, Donny and Sammi entered the well lit university library. He took a moment to look around, taking in the scene. The towering shelves of books, the hushed students going through their research, and the light from the windows created a soothing atmosphere that calmed his nerves.
They found an empty table near a secluded corner of the library and set up their laptops and textbooks. Samantha opened her math book and began typing notes, while Donny struggled to pay attention to his computer science homework. He'd gotten a pic of his girlfriend before they headed out, and he was eager to see what the app could do.
Before he did, though, Donny wanted to test it on the old librarian at the front desk. He quietly snapped a picture of the lady at the front desk, then a freshman girl, probably 19. He set Swap-a-Trait to change their ages, made sure they were both oblivious to the change, and clicked to swap.
Donny's breath hitched as he saw the librarian, a stern-faced woman in her fifties just moments ago, transform before his eyes. Her hair became a wild mane of curls, her skin smoothed out and glowed with youth, and her clothing changed to a casual hoodie and jeans.
"Donny, are you even listening to me?" Samantha asked, bringing him back to reality.
"Sorry, what did you say?" Donny asked, hastily minimizing the app on his phone.
"I said I need your help with this problem set. You're always so distracted lately," Samantha huffed, but she didn't seem too bothered by it.
Donny nodded and turned his attention to the problem set, but he couldn't shake off the feeling of glee that had come from watching the change.
He glanced over at Samantha, who was now completely focused on her math homework. Her blonde hair cascaded down her shoulders in soft waves, and her cat-like green eyes were narrowed in concentration as she wrote on her notebook.
It was time to see what other changes he could make. He saw a short Asian girl come in, and immediately had an idea. The girl was maybe 4'11", and he was curious what Sammi would be like if she were short instead of the statuesque stunner. Taking a quick shot of the short girl, and loading his pic of Sammi, Donny set his app to swap their heights, checked that neither would be aware anything had changed, and pressed the swap button.
Watching the short girl, he saw her legs suddenly grow, her skirt bunching up as her body stretched upwards. As her legs lengthened, her torso narrowed, making her look taller but also thinner. The transformation of her face was subtle, but noticeable - she lost the youthful plumpness in her cheeks and gained a stronger jawline that made her look more mature.
Sammi, on the other hand, began to shrink downwards.
Her tall stature contracted, every inch seeming to disappear before Donny's very eyes. Her blonde hair cascaded downwards, now framing a face that was much more petite and cute. He couldn't help but let out a low whistle as he saw his new Sammi - adorable, short but still the sexy young woman she had been before.
As reality remolded itself, he saw the outfits of Sammi and the now tall and leggy Asian woman had changed too.
The Asian woman now wore Sammi's tight, ripped blue jeans and crop top with the white lace bra peeking through. She still sported the same pair of dirty sneakers she had walk in with, but they looked more fitting now considering her height difference with everyone else around them.
She wore a pair of black leggings that accentuated her now more petite frame, and a baggy shirt that had a print of binary code on it. The neckline was cut low enough to hint at cleavage though she didn't seem to have much now, but the ensemble kept the geeky charm that turned Donny on.
As Sammi leaned over her books, she still had pinned up her hair in a messy bun, leaving a few loose strands to frame her face. Her thick glasses perched on the bridge of her nose, standing out even more with Sammi's new tiny stature.
Donny bit his lip, trying not to laugh out loud at the sheer absurdity of the situation.
Sammi's new small body bounced with curiosity as she looked around to take in the library from the new perspective of her short height. Noticing this, Donny felt his cock stirring in his pants, already imagining all the kinks and games they could explore as this new Sammi, with her new petite body. It wasn't quite what Donny wanted though...
Then he saw the perfect target. Browsing the magazine section was a black girl with a perfect ghetto booty. She was tall, with a perfect bubble butt. Donny's fingers itched to use his Swap-a-Trait app to give Sammi a similar posterior.
He quickly snapped a picture of the Black girl and loaded it onto his phone. Then, he pulled up a picture of Sammi and set the app to swap their butts. He checked the "oblivious" box, ensuring that neither of them would be aware of the change.
As soon as he hit the "swap" button, Donny felt a surge of excitement run through him.
He watched the black girl's body shift and change, her voluptuous curves flattening out until she had a completely flat ass. At the same time, Sammi's body began to transform. The lower half of her petite frame grew rounder, and her small butt suddenly filled out into a perfect, jiggly peach.
Donny couldn't believe what he was seeing. He felt his cock stiffen in his pants as he stared at Sammi's new figure. She looked back at him, confused by his reaction, but Donny couldn't speak. He was too excited by her new figure, and was trying to figure out a way Sammi could sneakily show off her new delicious butt to him.
She tilted her head, giving him a questioning look.
"My eyes are up here, Donny," she said, jokingly crossing her arms over her chest.
Donny snapped out of his stare and realized that he had been caught gaping at her figure. He gave an embarrassed chuckle and looked away.
"I just can't believe how amazing you look," he said, still trying to wrap his head around the sudden change. "Your ass... it's perfect."
Giggling, Sammi stood up from her chair and spun around for him. Giving herself a light spanking, causing her cheeks to jiggle in the most delightful of ways.
Donny was practically drooling at the sight before him. He watched as she gyrated her hips, giving him a little show while she acted like she didn't realize he was enjoying it so much.
"You like it, Donny?" Sammi asked over her shoulder, still twerking with barely contained enthusiasm. "Is this what you wanted to see? Is this what got you so horny for me to begin with?"
Donny couldn't believe his luck.
Here he was, staring at his girlfriend's perfect, voluptuous butt, and she had no idea that he was the one who had given it to her. It was as if the universe had conspired to grant him his deepest desires, and Donny couldn't help but feel a little guilty about it.
But only a little.
Sammi sat back down in her chair, her cheeks flushed with excitement. "So," she said, wiggling her eyebrows at Donny. "Do I pass your little test?"
Donny grinned.
"You passed with flying colors, Sammi."
Sammi smiled back, a playful glint in her eye. "Good. I aim to please."
They went back to their work, but Donny couldn't focus. His mind was still reeling from the transformation he had just witnessed. He couldn't believe how easy it had been to change Sammi's appearance with the Swap-a-Trait app. And the best part was, from her mind, it had always been this way.
Donny couldn't help but feel like a god, creating and shaping Sammi into the perfect girl for him. It was intoxicating.
He continued to browse the library, his eyes wandering to a girl sitting a few tables over. She had an amazing pair of breasts, full and perky with perfect pink nipples that peeked through her thin tank top. Donny felt his pulse quicken as he thought about giving Sammi the same assets.
Without hesitation, he snapped a picture of the girl and loaded it into Swap-a-Trait. He adjusted the settings to swap her chest with Sammi's, then hit the "Go" button.
Instantly, Sammi's body began to change. Her flat chest started to fill out, growing fuller and rounder until they were the same size as the girl's over at the other table.
Sammi's oversized geeky shirt began to stretch as her chest expanded, until a bit of her trim little belly could be seen.
Sammi looked down at herself in surprise, her hands instinctively reaching up to cup her newfound assets. She let out a gasp, then glanced over at Donny with a sly grin. "Well, I guess you like what you see," she said, her voice dripping with amusement.
Donny's eyes widened as he took in Sammi's new appearance. He had always thought she was beautiful, but now she was absolutely stunning. Her body was now the perfect hourglass shape, with full breasts that he couldn't wait to get his hands on.
"Holy shit, Sammi," he stammered, trying to keep his cool. "You look incredible."
She giggled, clearly enjoying his reaction. "Thanks, Donny.