Clearing his throat, the shrunken freshman struggled to form the words he wanted to say. After everything Daisy had done for him today, between rescuing him from the common room, to selflessly cutting a deal with Hazel to help him get back to normal, to giving him two of the best orgasms of his life, some part of him really wanted to return the favor—even if it meant getting up close and personal with the biggest, stinkiest part of her big, stinky body. "Y-you could sit on my face, if you want." 

Looking down at the tiny man nestled in her cleavage, Daisy blushed. "R-really? Max, I... I don't know. You don't want to go back there... right?"

Judging by the expression on her face, apprehensive but clearly and painfully hopeful, Max knew what she wanted to hear. "O-of course I do! Besides, how else are we supposed to pass the time?" 

"Well, we've still got six seasons of MLP..." Daisy scowled. "You're not just saying this to make me feel better, right?"

Max shook his head. In truth, of course, that was exactly what was going on here—but he did a fairly decent job making it sound otherwise. "No, I really want to! I mean..." For the first time since he'd gotten to college, he was on the verge of openly flirting with a girl. "I've been wanting to get a better look at your butt ever since this morning."

Daisy's face went even redder. "Really?"

Max nodded as eagerly as he could. "Really."

"O-oh, wow," said Daisy, stammering with arousal already. "T-the thing is, I just... I haven't really, uh..." She hesitated. "It's been a second since I showered. So it might be kinda dirty back there. I'd only be comfortable doing it if I knew you were totally okay with that." 

"I am," said Max, trying to keep himself from thinking about what Daisy's definition of 'kinda dirty' might be. "I trust you."

"Y-you promise?" Her tone remained uncertain—but shyly optimistic.

Max nodded, firmer than ever. "I promise." 

"Okay," said Daisy, carefully plucking the three-inch-tall freshman out of her cleavage. "S-so, you want to do this right now?"

Max shrugged. "Sure, why not?"

"C-cool." Sitting up on her knees, Daisy set Max down on the mattress just a foot away from her huge, naked ass. Then, she used both hands to spread her cheeks and give her shrunken friend a glimpse of what he was about to get into. 

The sight of Daisy's ass inspired immediate and intense second thoughts. If Max had still been regular-sized, it would have been twice as wide as him. Now, it looked big enough to swallow him whole—along with at least a hundred other three-inch-tall shrinkees. And it was filthy.

As the giant shut-in nervously shifted around in bed, the smell that wafted out of her crack made all the farts Max had sniffed so far today seem like nothing—and he knew this was just a taste of what he might expect inside. In the center of the chasm, just barely visible from where he stood, he could make out the single biggest asshole he'd ever seen, a pulsating pucker that looked like it could suck up a golf ball without stretching one bit. 

"You ready?" Anxious to begin, Daisy gave her hips a little shake, sending her whole rump jiggling. 

While the sight of her big, cellulite-covered booty wiggling back and forth was very, very enticing for the shrunken virgin at her feet, the idea that he'd just committed himself for a much closer look was seriously starting to give him pause. Still, he reminded himself, this wasn't about what he wanted. It was about showing Daisy how much he appreciated everything she did for him. 

"Ready," said Max, managing not to stutter. 

"Okay," said Daisy, slowly lowering herself down onto the bed, "here we go!"

A moment later, Max was completely buried under several hundred pounds of ass. Thankfully, rather than being squashed flat under one of Daisy's cheeks, he ended up going right between them—though based on all the sweat and funk that greeted him within, he had trouble seeing this as the better outcome.

"Oooh," moaned Daisy, rubbing her clit again. "Max, that feels amazing..."

Behind her, Max didn't want to risk opening his mouth to respond. He was already completely covered in the giant shut-in's sweat and butt funk, and he knew she was just getting warmed up. The more she ground her hips into the mattress, the deeper he seemed to go into her crack—and the further he went, the fouler it got.

"Fffuck." Well on the way to another toe-curling orgasm, Daisy gasped. "I... I just hope this is as good for you as it is for me..."

By now, Max had made it to the bottom of the giant shut-in's crack—and was having trouble fending off the advances of her colossal, filthy asshole. His sense of smell felt damaged beyond repair, and the rest of his senses weren't doing any better. His only solace was that Daisy's movements seemed to be quickening, suggesting that she was getting pretty close to cumming again—but as he felt the muscles around her huge dirty pucker starting to pulse, he realized that his situation was going to get much worse before it got better.

BBBBBBRRRRRRRAAAAAAAAAAAAAAAAAAAAPPPPPPPPPPPPPPPP

In the heat of her third big orgasm of the day, Daisy was powerless to resist the urge to let an absolutely colossal fart rip in Max's tiny face. While she'd always been totally sincere in her concerns for his well-being and remained committed to getting him back to normal, she'd been fantasizing about this exact scenario ever since laying eyes on him this morning. The climax that followed was the longest and hardest she'd ever had—nearly a full minute from start to finish. 

Meanwhile, trapped against her asshole as it blasted him with a tidal wave of noxious gas, Max was in hell. Every inch of his body was surrounded by crushing pressure, his head was spinning, and his eyes, nose, throat and lungs felt like they were on fire. This was, quite easily, the worst idea he'd ever had in his entire life. The only question now was when Daisy would take mercy on him and peel him out. 

"Oh, Max," panted Daisy, soaked from head to toe in sweat and still lazily teasing her clit. "That was incredible!" 

Prying her shrunken partner from her crack, she brought him around to her face and giggled at the powerful smell that came with him. 

"Phew!" She waved a hand in front of her face. "I guess if any of the other girls around here had any question who you belonged to, this clears that up!"

Staring up at the giant, horny shut-in who had just subjected him to the septic nightmare prison of her asscrack, Max did his best not to look as terrified as he felt. "Heh, y-yeah, totally." 

Daisy grinned. "Sooo... was that everything you hoped for?"

"Y-yeah," said Max, lying through his shell-shocked teeth. "F-for sure."

"Glad to hear it," said Daisy, lowering her eyelids. "I think we're gonna have to start doing that more often." 

Max swallowed hard. From where he sat right now, it was going to be a very, very long month. "C-cool."

"Cool," giggled Daisy. Then, before she could ask her shrunken friend if he was in the mood for a second round, a familiar ping sound directed both undergrads to her laptop—where a new direct message had just appeared in her Discord inbox.