Aoi wrapped up her last few reps of the Good Morning stretch, bending forward while clenching her sizable glutes, relishing in the almost imperceptible feeling of your tiny body clinging to her left butt cheek. Every chance she got, the mischievous Asian giantess glanced at the mirrors lining the walls, looking right at your spread-eagled body stretch and contort as Aoi flexed her ass. It was hilarious and adorable, and Aoi was on cloud nine.

Morgan, meanwhile, found it difficult to keep demonstrating the technique while avoiding staring at you. You looked so diminutive and helpless on the curvaceous girl’s globe-like butt cheek, so much of her ass exposed thanks to her skimpy as hell booty shorts. Your new roommate could tell how sweaty and flattened you were, yet couldn’t do a thing about it. Especially not with Heather watching the class with rapt attention, a happy, naïve smile on her face.

The Good Morning stretches finished, Morgan snapped her attention from Aoi’s bubble butt and your predicament, and addressed the class. “Alright, let’s keep up the pace. You girls are doing amazing, so next up is squats. Let’s see a good thirty or so, at least!” Morgan declared, earning enthusiastic cheers and quiet groans in equal measure.

It was only when Morgan caught sight of Aoi’s triumphant grin that the brown-haired fitness teacher felt a sinking feeling in her gut. Sure enough, the playful Asian giantess began easily conquering the squats, dipping very low to the ground with each one. At the same time, her massive derriere clenched tight as Aoi thrust it out, and Morgan could only watch with a small frown as you were pulled even tighter against your flirtatious captor’s thick ass cheek.

From her chair, Heather frowned a tiny bit. “Morgan, darlin’…is lil’ Hunter doin’ the thang? Tha’ mind an’ muscle connector thang you were mentionin’?” The somewhat scatterbrained blonde leaned forward. “Ah can’t quite make it out…”

Morgan winced, and so did you. Exhausted as you were because of Aoi’s treatment of you, you realized that holding up your end of Morgan’s lie was essentially to staying in Heather’s good graces. Mustering what small strength you still had within you, you began twitching and vibrating to the best of your ability. With all your strength, all you could manage was a small jiggle of Aoi’s plump left cheek, but it was enough to catch Heather’s eye.

“Ah! There it is! What a quaint lil’ idea!” Heather beamed.

Morgan fidgeted with her hands. “Uh…yup! Hunter’s pretty smart, isn’t he?” With an internal groan, she forced a smile towards Aoi. “H-how’s he…feel?”

Aoi grinned radiantly. “Just perfect, ma’am! I love the little guy to death! In fact, I don’t think I’ve ever felt this motivated to exercise in my life!” Aoi giggled, and reached and hand back to gently rub your body. To Heather, it looked like a simple show of affectionate acknowledgment. Morgan though, could clearly see Aoi lightly press her fingers into your squished body, jamming your head just a bit more into her doughy flesh.

Heather stood from her chair and moved towards the door. “Well, thanks for lettin’ me into yer class for a bit! You should get ‘em off their feet for a while, darlin’, after the squats. Maybe some seated splits? Jus’ a thought!” With a parting wave, your boss strolled from the room.

Morgan paled at the suggestion of more seated exercises, her compassionate brain instantly thinking of what that would put you through. However, before she could say anything, Aoi beat her to it. Having just finished her thirty squats, Aoi wiped some sweat from her brow, inconspicuously slapped her hands against her butt (and of course you, by extension), and spoke up.

“I second the seated squats, ma’am!” Aoi stated, taking the initiative by hopping right down onto the ground, plopping her meaty buns into place on her yoga mat. There was a faint but audible squelching noise as her swelteringly sweaty ass cheeks clapped into place, and Morgan couldn’t help but wince, especially as Aoi’s fleshy cheeks jiggled and wobbled before settling. She couldn’t even see you anymore, and could only imagine you buried under all of the Asian giantess’ weight.

Before Morgan could snap out of her daze, the rest of the class (assuming that Heather’s word was law) followed Aoi’s preemptive beginning by sitting back down and stretching their legs out. Your new roommate, despite being the class teacher, found herself the last person to actually join in the exercise. Glumly, she sank to the floor into a perfect split. Aoi had absolutely outsmarted her, and Morgan knew she couldn’t backtrack now.

Stuck as you were in your own hell, you didn’t know how this mental war going on. Your entire world was Aoi’s ass cheek now, and it was utterly dominating you in every conceivable way. You were caked in a heavy layer of sweat, which was now gluing you firmly to the buttery smooth skin of Aoi’s left cheek. The girl’s full weight bearing down on you flattened your already stretched thin body even more, on top of making it difficult to breathe and utterly impossible to move.

Continuing to reign supreme in the flexibility department, Aoi stretched her legs out as far to the side as possible, only taking a second to match Morgan’s perfect split. However, as she did so, her booty dragged and wiggled across the yoga mat, smearing you incessantly. By the time she held the perfect pose, Aoi’s ass had smudged you into closer to a blobby human shape than a defined spread-eagle pose.

All of this torment was taking its toll on you, both mentally but especially physically. Though your clothes were still intact for the moment, they were just about all that remained which distinguished you as human. With all the smearing and grinding Aoi was subjecting you to, your body was so glued to her flesh that you were about fused with it, akin to a living tattoo. Even your skin tone was beginning to match her darker tan color, a byproduct of being engrained into her ass. With a bit more effort on her part, Aoi could permanently entrap you in her booty.

By coincidence or the malice of fate, the entire rest of the class was spent doing seated exercises. You suffered in the sweltering abyss of hell that was being trapped under Aoi for over an hour until the class ended. Your mind was a hazy mess, all of the pounding and grinding Aoi did for that last hour blurring together into an indiscernible torment. By the time Aoi finally peeled her grossly sweaty yet alluring sexy rear end off the yoga mat, you couldn’t feel a difference between your body and her butt cheek at all. The fleshy mound had just about totally claimed you in its warm, doughy embrace.

Another tragic event had occurred in that last hour, namely Morgan accepting that freeing you from Aoi would be impossible until after the class. However, what this meant was that Morgan allowed herself to push thoughts of worry for you aside, and focus on teaching to the best of her ability. As she embraced her role and got back into the swing of steady exercise, you slipped further and further from her mind.

In fact, as class ended, eight different girls rushed up to Morgan, bombarding her with equal measures of praise for her teaching skill, and questions about specific poses. With a confident grin, Morgan answered each of their questions in turn, and didn’t notice a single thing as Aoi, mischievous grin on full display, packed up her belongings and slipped out of the room. Each step she took gratuitously shaking her thick glutes, and bouncing you up and down.

Aoi took a moment to catch her breath, and then sped off towards the gym’s exit. Though she desperately wanted a shower, getting home with you in tow was her primary goal. Aoi could hardly wait to get home and play with you further, imaging the wonderful things she could do with her new tiny boyfriend. In her somewhat off-kilter mind, she was still flirting with you, and she justified that an adorable tiny would obviously be thrilled to love her back. It didn’t click in her mind that maybe a tiny wouldn’t like being dominated by sweat and pain for two hours, and end up as a living ass tattoo.

Before she crossed halfway to the exit, the classroom door swung open, and Morgan raced out. Aoi froze hearing the sound, and spun around instantly, trying to hide her gigantic booty and you from Morgan’s gaze. She managed a pleasant smile as Morgan shouted to her from the door, and said...
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April 23, 2025
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