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Chapter 17
by
JustSpirit
Any change?
Try to convince David to choose the smallest possible change
21:00 | Saturday 2 Aug 2025 | Lexi's bedroom, Putney flat
"Look, David," you begin, trying to keep your voice steady despite your racing heart. You take a deep breath and meet his eyes directly. "If you really have to choose something—and it seems like you do—please pick the butt option. It's... it's the least invasive of the three."
David's gaze flicks between your face and his phone screen, conflict evident in his expression. "Are you sure? I mean, this whole thing is so fucked up. I didn't ask for this kind of power over you."
"None of us asked for any of this," you say, gesturing at your already transformed body. "But if there's no way around it, then yes, I'd rather have a slightly bigger ass than be stupider or have massive tits I can't hide."
He nods slowly, seeming to appreciate your directness. "That makes sense. I just..."
"What?" you ask, suddenly worried by his hesitation.
David runs a hand through his hair, looking uncomfortable. "It's just weird, you know? A few hours ago you were Alex, my roommate, and now you're... well, you're Lexi. With curves and everything. And I'm supposed to be deciding how your body changes?"
"Trust me, it's weirder being on this end of things," you say with a bitter laugh.
He sits down on the edge of your bed, his weight creating a dip that slides you slightly toward him. The proximity makes you suddenly aware of how little you're wearing—just the tiny pink crop top and those white shorts that barely contain your already enhanced rear.
"For what it's worth," David says quietly, "I think you're handling this pretty well. Better than I would."
You feel a surprising flutter of warmth at the compliment. "Thanks. So... the butt option?"
He nods, tapping the screen. "Alright. 'Bubble Butt' it is."

As soon as his finger presses the option, Becky appears on both phones simultaneously, clapping her digital hands. "Ooh, excellent choice! Administrator selection confirmed: Bubble Butt enhancement!"
A tingling warmth floods your lower body almost immediately. Unlike the dramatic transformation that changed you from Alex to Lexi, this feels more focused, a slow heat concentrating in your glutes and hips. You gasp involuntarily as your pelvis shifts, bones rearranging slightly to accommodate the new proportions. Your already generous rear begins to swell further, the white shorts growing tighter by the second.
"Oh my god," David whispers, unable to look away as your buttocks expand visibly, filling out with additional soft tissue that pushes against the confines of your clothing. The seams of your shorts strain audibly.
The sensation isn't painful—more like an intense pressure combined with waves of tingling sensitivity. You feel your center of gravity shift backward slightly as your posterior gains another inch of projection, becoming rounder and more prominent.
"Holy shit," you breathe, reaching back to feel the new contours. Your hands confirm what your nerves are telling you—your ass has grown significantly more pronounced, with a perfect bubble shape that would be impossible to achieve naturally.
David swallows hard, his eyes fixed on your transformed backside. "It's... I mean... wow." He seems to have lost his capacity for coherent sentences.
"Thank you for choosing the ass," you say, trying to sound casual despite how strange the words feel coming out of your mouth. "Seriously. The others would have been worse."
Becky giggles from both phones. "Administrator daily selection complete! Don't forget, Lexi needs to complete three more task tiers today for her daily goals! And David, you'll have another choice tomorrow night!"
David finally tears his eyes away from your enhanced posterior. "I should probably... give you some space," he says, standing awkwardly. The front of his pants betrays his physical reaction to what he's just witnessed.
As he heads to the door, he pauses. "For what it's worth, I really did choose what I thought would bother you least."
You nod, believing him despite everything. "I know. Thanks."
After he leaves, you stand up experimentally, immediately noticing how your enhanced bottom alters your gait. Each step sends a slight jiggle through your rear, a constant reminder of the change. You'll need to adjust how you walk, sit, and likely need new pants soon.
"Another satisfied customer!" Becky chirps from your phone. "And look at that—your Progress Path just increased to 4%! Just one more percent until Outfit Suggestions unlocks!"
21:20 | Saturday 2 Aug 2025 | Lexi's bedroom, Putney flat
[TIMER] | Climax deadline | 06:50 remaining
What comes after?
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The "Perfect Girlfriend" app
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Updated on Dec 19, 2025
by uluz81
Created on Oct 1, 2025
by JustSpirit
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