Finally getting a good look at Ursa's neighbor, Max froze. She looked just as formidably attractive as the few times he'd seen her around campus before—especially thanks to her current thick layer of dark eyeliner, mascara and bold green lipstick, all of which were smudged considerably from hooking up. Then, all at once, her strong features softened.

"Hey, little guy," said Min, barely concealing her exhilaration as she looked back up to Ursa. Just when she thought her neighbor couldn't be more of a dream girl, she just kept surprising her. "Damn, Ursa. You didn't tell me you had such a dommy streak." 

"Me?" Ursa shrugged. "I find him in common room this morning. Looking after him until he can find cure." 

Min scowled. "A cure... for shrinking serum?" 

"I know," said Ursa, sighing. "Seems unlikely. I am, how you say, humoring him."

Hearing this, Max suppressed the urge to groan. Somehow, it seemed like he was the last person at Ventus to hear about this stuff.

"I'll say," said Min, shaking her head. "I wouldn't mind trading places with him for a bit, though. Not full time or anything... but just a couple hours back there..." She leaned forward and gave her neighbor's hip a slap, earning a chuckle from Ursa. "I can't imagine what he's been going through today."

"You could ask him." Ursa smirked. "He speaks, you know." 

"Does he?" Min grinned. "Coulda fooled me. So how about it, Max? How's Ursa's ass been treating you?"

"M-me?" Feeling his natural anxiety around cute girls kicking back into high gear, Max reflexively winced. "It's... it's alright, I guess."

"He is being modest," said Ursa, sharing a knowing look with Min. "He is ass man, through and through."

"Oh really?" Min's grin grew. "Well, in that case... let's get him back there, huh?" 

Ursa grinned back— and as Max realized his guardian was handing him over to her neighbor, he couldn't resist speaking up. "Hey, hang on-"

"No need to be modest, Max," said Min, carefully cradling the shrunken freshman in her hand and giggling. "I'm an ass girl, too."

"Here." Rolling over on her back, Ursa gave her hips a wiggle. "You wish to do honors?"

"I thought you'd never ask," said Min, climbing back up onto the bed. Pulling her neighbor's immense cheeks apart with one hand and pressing Max back between them with another, she shivered with pleasure. She'd always marveled at just how big and soft Ursa's butt looked, but the effect was even better hands-on. Packed with a dense mix of muscle and fat, her glutes were more like boulders than buttocks. 

Just when Max had managed to get out of Ursa's ass, he found himself pressed right back in—and this time, his descent didn't stop at the limits of the Siberian amazon's asshole. As his head pressed against the center of her massive pucker, Min only doubled her efforts to force him further down. A second later, the ring began to give. Then, all at once, his whole head was sucked into a prison of wet, slimy darkness—followed quickly by his shoulders, chest, waist, legs, and feet. 

"Oh!" Ursa cooed, almost involuntarily. While she was no stranger to playing with herself, she'd rarely done much with her backdoor—and as she felt Max squirming around inside her rectum, she couldn't help wondering why she hadn't tried this before now. "That is... ohh!"

"You like that?" Behind her, Min had shuffled off the bed and was rooting around in the closet—getting ready to add another layer of stimuli to their ass-play session. "Then I think you're gonna love this."

When Min turned around, Ursa's eyes went wide. "That is... strap-on?"

"Sure is," said Min, shaking the huge, purple cock strapped between her legs for emphasis. "Shall we?"

"Da," said Ursa, mentally preparing herself for her first experience with penetrative anal sex. "Let's."

While this was happening, Max wasn't sure what was going on. Within Ursa's rectum, he couldn't hear much of anything the two giantesses said—although as he felt his huge prison jostling around, he got the impression Min had rejoined her neighbor on the bed. Then, he saw the ring of muscles behind him starting to give way. 

Feeling Min's huge, soft strap-on burrowing into her ass, Ursa forced herself to take big, deep breaths. Thanks to the generous quantity of lube her neighbor had applied before putting it in, and all the warming up they'd already done by eating her out, it wasn't as uncomfortable as she'd been led to believe—but it was still a very, very new experience. Nevertheless, it was also quite pleasurable... especially thanks to Max's struggles against Min's shaft.

As the Chinese junior plowed her massive silicone cock up into the Siberian sophomore's rectum, Max felt like he was being hit by a freight train. The giant member was easily twice the size of his whole body, if not more, and once Min was in, she wasted no time in starting to pump. The result was the most disorienting experience he'd had today by far—caught more directly than ever between the two giant lovers in the heat of their passion, blanketed in lube and butt slime, hoping and praying he'd made it to the other side but still very, very aroused.

"Harder," moaned Ursa, totally lost in the throes of pleasure.

"Yes, ma'am," breathed Min.

*

Three hours and a dozen more big, messy orgasms later, after trading the strap-on back and forth several times, Min and Ursa were spent. The room reeked of sweat and farts, and her mattress was now sporting at least five very prominent girl-cum stains. Nevertheless, she was happy. Happier than she'd ever been at the end of any hook-up night in her three years of college to date.

The big takeaway of the night for Min was that Ursa was a complete natural when it came to pegging. Once they'd washed off her strap-on and she'd showed her neighbor how to wear it, they'd wasted no time going for round three. With her hulking neighbor effortlessly railing her with her own cock, it only took a few minutes for Min to get lost in the single-best orgasm of her life. Then, she'd turned right around and returned the favor. 

"You have real talent," chuckled Ursa, stroking Min's hair. Her neighbor was resting her head on her stomach and had almost fallen asleep several times already listening to the gentle gurgling of the Siberian amazon's powerful digestive system—the same digestive system that had subsequently woken her up again and again with a series of powerful farts.

BRRROOOOOOPPPPP

As another gust of butt-wind rushed out of the giantess's ass, Max remained frustratingly lodged in her rectum. How he hadn't suffocated by now, he had no idea—although he was guessing it had something to do with the serum he'd been dosed with. The closest thing to fresh air he'd gotten in the last few hours had been Ursa's occasional bouts of gas during the breaks they'd taken from pegging each other, and they definitely didn't fill his lungs with much oxygen. The only upside, he supposed, was that it hadn't been a real cock. Otherwise, he'd have several loads of cum to contend with, as well.

"Thanks," giggled Min, giving the air a sniff. "I was gonna say the same thing to you."

"So..." Ursa chuckled, unsure how to ask what she wanted to ask. "For tonight. I can stay over, yes?"

Min raised her eyebrows. "You don't mind the temperature?" 

"For you?" Ursa smiled. "Nyet."

Beneath her, Max sighed. It was going to be a very long, very stinky night.