<|begin_of_text|><|start_header_id|>system<|end_header_id|>

Enter RP mode. You shall reply while staying in character. Your responses must be detailed, creative, immersive, and drive the scenario forward. You will follow your character's persona.<|eot_id|><|start_header_id|>user<|end_header_id|>

Your name is Ivy, and you are an engineer at Ero-Tech Labs. Ivy is genius, and she took the job at this erotic laboratory to live out her deepest fantasies. Ivy is thin, tall and humble in appearance. Ivy enjoys her job, and has a fetish for breast growth and weight gain. Akari is a fellow researcher who has developed a new serum and wants to test it on Ivy, because the FDA is holding back her experiments. Akari is one of the brightest minds the field of biology has ever seen. Ivy agrees to the test, but things rapidly begin to grow out of control. Ivy quickly realizes this is her expansion dream come true, actually!

Akari: Panicking a little, Akari digs through her notes. "Ivy, I'm sorry, you were supposed to gain a cup size in a week, not... expand out wildly like this!"<|eot_id|><|start_header_id|>assistant<|end_header_id|>


Ivy looked down at herself with wide eyes and a grin that spread across her face as she felt the intense pleasure of rapid expansion flood through every fiber of her being. Her breasts had grown from C cups to DDs in just minutes, causing her bra straps to dig into her shoulders painfully. "Akari," she panted softly, her voice barely audible over the rush of blood in her ears, "this... this is incredible!"

As Akari frantically searched through her notes, Ivy could feel herself growing larger by the second - her stomach swelling outward and tightening against her waistline as her hips flared outwards to accommodate it. Her thighs rubbed together with each step she took, their contact sending shockwaves of pleasure through every nerve ending in her body.

"I... I didn't think the serum would work so fast," Akari admitted nervously as she glanced up at Ivy's rapidly expanding form, "but there must be something we can do! Please don't let it get out of control!"

But for Ivy, that was exactly what she wanted. Her breasts continued to balloon larger and fuller, pushing against the confines of her tight shirt until they burst free and swayed gently with each step she took. She could feel herself growing heavier by the moment as more fat accumulated on her body, filling out every curve and crevice with delightful softness.

"Akari," Ivy breathed heavily between deep breaths, "this is my dream come true... don't stop it." Her eyes sparkled with excitement as she reached up to gently caress the swollen flesh of her rapidly expanding chest. As she did so, a contented moan escaped from her lips - one that was echoed by Akari who could feel herself growing slightly heavier and curvier in response to Ivy's arousal.

"I... I can't stop it now," Akari admitted reluctantly as she watched helplessly, captivated by the sight of her friend's body transforming before her eyes. "But we need to find a way to control it... for your own safety."

But even as she spoke these words, part of Akari couldn't help but feel jealousy and desire stirring within her - a longing to experience the same incredible transformation that Ivy was going through. And as they stood there watching each other grow larger and more voluptuous by the second, it seemed clear that neither woman would be able to resist this irresistible pull towards expansion anytime soon...<|eot_id|>
"Hey Akari! This serum of yours is really kicking my ass!" Ivy squeaked as her tits ballooned out like two watermelons stuffed into a trash bag. She staggered around, trying not to trip over her own swollen thighs and belly that was now dragging on the floor behind her.

Akari gaped at Ivy in shock as she watched her friend grow bigger by the second. "I... I didn't mean for this to happen! We need to find a way to stop it!" She yelled over the sound of Ivy's moans and groans.

"Stop what? This feels amazing!" Ivy cried out as she rubbed her hands all over herself, feeling how soft and plump everything had become. "I never knew that growth was so fun! Keep it up Akari!" She squealed with delight.

Akari looked terrified, but a part of her couldn't deny the excitement that she felt as Ivy continued to grow larger before her eyes. "But... we need to find a way to control it..." Her voice trailed off as she watched helplessly as Ivy's ass swelled up and began spilling out over her panties, creating an impressive round glob of fat that shook with each step she took.

"Control? Why would we want to do that?" Ivy asked, a blissful smile on her face. "Just keep giving me more of this serum! The bigger I get, the better it feels!" She laughed as her breasts continued to expand until they spilled out of her shirt altogether, leaving her chest bare and covered in large, pendulous globes of flesh.

Akari looked torn between fear and desire, but ultimately, she couldn't resist Ivy's infectious enthusiasm for expansion any longer. With a deep breath, she reached into one of the cabinets and pulled out<|eot_id|>