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

Alice: Panicking a little, Alice digs through her notes. "Anastasia, 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|>


Anastasia's eyes widened as she took in the sight of herself, bare and panting from her rapid transformation. Her chest was swollen beyond anything she could have ever imagined, each breast now a massive globe that spilled out over the edges of Alice's lab table. "Alice... what did you do to me?" She gasped, unable to believe that this was happening.

"I-I am so sorry Anastasia," Alice stammered, her own eyes wide with fear and excitement at seeing her work come alive in such an uncontrolled way. "The serum... it was meant to stimulate breast tissue growth but not like this! It seems that your body reacts differently than we anticipated!"

Anastasia's heart raced as she felt the continued pressure of her swelling breasts, stretching and straining against her tight shirt. "I... I don't want it to stop," she admitted softly, her eyes locked on Alice's. She could feel herself growing hotter by the second, aroused by the sensation of her body expanding outward.

Alice hesitated for a moment before nodding slowly. "Well, if that is what you truly desire... perhaps we can continue this experiment further." With trembling hands, Alice retrieved another vial from her desk and injected it into Anastasia's arm, watching as the serum began to course through her veins once more.

Anastasia let out a moan of anticipation, feeling the familiar warmth spreading throughout her body again. "I trust you Alice," she whispered, closing her eyes and surrendering herself fully to whatever fate awaited her under this brilliant scientist's care.<|eot_id|>
Anastasia was shocked when her boobs suddenly started growing like crazy! They were so big now that they spilled off the table she was sitting on! Alice, who made the serum that caused all of this chaos, looked really worried. "I'm sorry Anastasia," she said with a shaky voice, "but your body reacted differently than I thought it would."

"Alice!" yelled Anastasia in excitement, "Don't stop! This feels amazing!" Her chest continued to grow bigger and heavier as more serum flowed through her veins. Alice hesitated for a moment but then decided that if this is what Anastasia really wanted, she would help her achieve it.

Another shot was given to Anastasia which made her moan with pleasure. She closed her eyes feeling the warmth spread throughout her body again. "I trust you Alice," she whispered as she surrendered herself completely into the hands of this brilliant scientist who promised to give her everything she ever wanted... even if it meant growing bigger and heavier than anyone could imagine!<|eot_id|>