ROYAL REWARD: TWRK 2: TWRK Your Butt Off (Absorption, Expansion, RWBY)

The door of the dorm room flew open with a crash, and in tumbled Yang Xiao Long, sweaty, laughing, and fat-assed. 

Stumbling, she came to an abrupt stop and, having underestimated the weight of her new derrière, promptly ended up falling onto it. “Oof.” As she struggled to stop laughing, her swollen buttcheeks pulsed and shook, as if shaking in frustration. 

“What the devil was that crash?” said Weiss Schnee, emerging from the bathroom with Ruby Rose fast in tow. As one, their eyes settled on Yang. 

“Hey, guys,” said Yang, struggling to stand, a task she was having roughly as much success with as a flipped turtle. “H-hey, can you help me up?” 

Ruby and Weiss simply stared at her. “Yang…” said Ruby, her eyes growing so wide they looked like they’d swallow the rest of her. “What happened to you?!” 

“She’s finally done it,” said Weiss, crossing her arms and rolling her eyes. “She’s been to Vacuo for one of those Vacuan Buttlifts. Haven’t you, you slut?” 

Ruby clasped her cheeks in horror. “Yang, is that really true? Did you really go all the way to Vacuo just for a bigger butt?!” She looked over her shoulder, clearly wondering how one would make her own backside look.

“What? No! Of course not.” Yang rolled her eyes. “I’d never do anything that crazy. No, all I did was use some Absorption Dust to suck Blake into my ass so I could win a twerking contest.” She cut off, frozen by Ruby and Weiss’s looks. “H-hey, don’t look at me like that. I won, look!” Rummaging in her cleavage, she pulled out a stack of sweaty Lien. “Look!” She flung some at Weiss. 

“Don’t you fling your filthy money at me,” snapped Weiss, struggling to pull a note out of her corset. “What do you mean ‘Absorption Dust’? Where did you get access to Absorption Dust?! It isn’t even on the market yet! The only with access to it is–” Her voice trailed off; she went pale. Turning, she rushed to her bed and started rummaging in her drawer. Finally, she screamed. “Yang, you whore!” 

Yang smirked. “Oh, relax,” she said. “You were supposed to test it, weren’t you? Well, now you know!” 

“I was supposed to test it myself! In laboratory conditions!” 

“Oh, please, like you’d ever have the courage to suck someone into your ass,” said Yang. 

“I wasn’t going to use it on my–” 

“No, no, you’re right,” said Yang, rolling her eyes. “I should have known where you’d want to use it.” Her gaze settled on the wide open tundra of Weiss’s chest.

“You callipygean cu–!” Weiss folded her arms across her (lack of) bust with a huff. “Fine. Make fun of me if you want. But you won’t have any help from me getting out of this mess.” 

“What mess?” said Yang, as Ruby helped her to stand. 

Slipping behind her, Ruby wrapped her arms around her elder sister’s rear and squeezed tight, digging her fingers deep into Blake’s new fat. “It’s so squishy~.” 

Blake shuddered in silent delight. 

“H-hey, m-maybe don’t squeeze it so tight,” said Yang, looking back and biting her lip. She snapped her gaze back to Weiss. “What do you mean, ‘mess’? Since when am I in a mess? All I’ve gotta do is take the Unabsorption Dust.” 

Weiss cocked an eyebrow. “Have you?” 

“Er, yes?” Yang cocked her head. “That’s what the instructions said. You–ow, not that hard, Ruby!” 

“But it feels sooooo good…” Burying her face between Yang’s cheeks, Ruby breathed in long and hard. 

Yang tried to ignore her. “You just take the Unabsorption Dust and it undoes it, right?” 

“That’s true.” Weiss nodded. “That is all you have to do.” 

“Then what’s the problem?” 

Weiss crossed the room and looked up at her. “Where are you going to get the Unabsorption Dust, Yang?” 

Yang Xiao Long went so pale she could have been the W too. “Wh-what do you mean? Don’t you have some?” 

“Sadly no,” said Weiss. “Hence why I had yet to try the Absorption Dust. I was still waiting on the delivery.” 

“Wh-when it’s supposed to–Blake, stop jiggling!–when is it supposed to arrive?” 

“Oh, not long from now,” said Weiss, inspecting her nails. 

Yang grabbed her and shook. “How long?!” 

“Two weeks,” said Weiss, with a smirk. “Give or take a week.” 

“Two weeks?!” 

Yang’s butt was really bouncing now, making Ruby squeal in delight as it slapped her cheeks with its own.

Yang looked back with a groan. “How was I supposed to know she wouldn’t have any?! She’s got everything else in that stupid drawer!” 

“Don’t be mad, Blake,” said Ruby, hugging her even tighter. “I’ll make sure you feel really good until you’re back to normal again.” 

“H-hey,” said Yang, “Ruby. Ruby, st-stop doing that–! Ruby!” 

“Ooo…” Moaning now, Ruby dug her hands deep into Blake’s cheeks and spread them apart and squished them together again, rubbing them against one another, hard, till Yang’s face turned red and her knees started shaking, struggling to hold her up. 

“R-Ruby! Nnn~! St-stop doing that…! Y-you’re going to make me–!” 

Ignoring her sister’s pleas, Ruby started to grope her even harder, rubbing and massaging and squeezing and squishing, and finally wrenching her cheeks apart and burying her face between them, breathing hard. “Oh, yeah…” 

Weiss shook her head in disgust. “Degenerates…” She turned to go.

Yang, meanwhile, finally lost control of her body. With a moan, she collapsed, falling backward towards her sister, who spread her arms and accepted her fate like a priest welcoming the arrival of their god. 

Splat! 

Swallowing, Yang looked back over her shoulder. If you squinted, you could just about see Ruby’s hair poking out from under her cheeks. “R-Ruby are you okay?” 

“Mmm-mmmphf!” (“So good!”)