Earlier, somewhere else...
Lillian was hurrying towards the bathroom, she could simply not handle the supercharging pressure in her gut anymore. Normally, she'd just simply let her gas out in many big, loud explosive bursts throughout the day but given your presence and her interest in you she forced herself to hold it all in, which she knew was going to cost her dearly. Not only she was plenty gassy regardless of what she ate but if she were to hold it in, it'd simply get a whole lot worse later on.
Knowing that other people besides her friends could be quite sensitive and annoying about it, her only choice was to go to the bathroom to unleash her pent-up gas in relative peace. She hoped that she'd find no one in the bathroom but even if there were more people, they'd most likely run out the moment she started letting loose.
Unknown to her, she wouldn't be completely alone even if any girls in the bathroom booked it for there was someone hitching a ride in the depths of her luscious, plump "assets": A girl with silver hair wearing nun's habits that were probably way too tight on her own curvaceous figure, which had no need to envy anything from girls like Lillian herself. She had followed behind her for a bit before unexpectedly vanishing into thin air, or so it would've seemed to most people...
What actually happened was that she used a unique gift of hers, an ability that was completely unheard of in this world throughout all of its history: To be able to change sizes at will, both her own and others. And it just so happened that in spite of her job as a part-time nun, this girl in particular was quite the massive pervert who enjoyed the bigger butts in life and any gas they'd let off. She also had a fondness for using her own sizable rear and powerful booty blasts on some guy but so far she hadn't found anyone that struck her fancy.
This girl had been working at Gulliver High since last year as the previous nun retired, working at the school's built-in chapel though given its size it was more like a built-in church proper. In addition to that, this girl taught the Religious Studies optional subject, which had been present throughout all of the school's history but it had only become an optional course in recent years. Watching the girls from afar or as she passed by, she learned of Lillian and her friends since they checked two of the boxes she cared about: big, loud behinds.
Hearing that Lillian was about to literally explode was more divine music to her ears than any symphony or song they may have played at the church and so she followed her, not letting such an opportunity pass her. Just as she got close enough she swiftly shrank herself and took a dive straight towards Lillian's humongous, bouncing booty. Her shorts had ridden down somewhat in her haste, exposing a bit of her deep-looking crack. Plenty for the horny shrunken nun, who shrank herself to the same size as a Lilliputian.
She found herself almost immediately enveloped by warm, bouncing jello-like flesh and her first impulse was to hug one of those gigantic meaty walls, trying to sink her face into it as much as she could, rubbing it from side to side as well. She had heard Lillian's boasts of having the biggest, fattest ass in the entire school, not counting older and heavier women and there was definitely credit to her claim. If the silver-haired nun had to give it a rating herself she'd give her a solid A on feeling alone.
If Lillian hadn't been nearly overwhelmed by the intense pressure in her gut she would've noticed that she had someone digging between her greater cheeks. She pushed the bathroom's door open and much to her annoyance there were some people inside. On top of the counter there was a small group of Gullie girls that were applying makeup while their Brob friend was heading for one of the stalls herself. They all froze when they saw Lillian almost break the door, huffing and puffing while sweating. Her chubby tummy rumbled visibly and also made loud gurgling groans that they all heard, which made them shiver in terror.
"I don't think you're gonna want to be here. You better go to the gym's girls' bathroom" Lillian warned tiredly.
"Holy shit she's gonna blow!" One of the Gullie girls shrieked.
"We need to get out of here!" Another Gullie girl said, turning to look at their Brob friend.
"B-But I needed to pee" Said girl replied, as if pleading to be given some time to take care of her business.
Lillian couldn't even speak anymore, she simply took a deep breath before a rumbling, roaring bomb of a fart erupted violently from the depths of her massive rear, the noise was so loud that all of the girls had to cover their own ears and in the case of the Gullies that wasn't much help, they felt like their skulls were inside of a Brob-sized revving engine while their bones rattled. They all could feel the sheer vibrations in the air.
The smell hit them all like a truck as well, a powerful reek of mostly meat and beans to the surprise of no one who knew her since those were the main components of her diet though letting all that gas get supercharged and ferment while holding it in made it considerably worse than usual. The Brob girl could've sworn she felt her own skin turning green and desperately picked up her Gullie friends before running for her life.
Meanwhile, the silver-haired nun had only grown increasingly eager as the gurgling groans coming from deeper into the darkness within Lillian's chasm of a crack became louder until it inevitably erupted hitting her at practically point-blank, feeling as if a volcano exploded right in front of her, the immense torrent of furious, hot winds blew into her with untold force, pushing her all the way back until she hit a taut wall of fabric, that being Lillian's thong, which was blown strongly enough by the enormous gassy release that it domed out like a parachute but as soon as the rumbling blast died out, the strained fabric forced itself back into shape, effectively sling-shotting her straight towards the depth of Lillian's crack.
The pervy nun was caught off-guard somewhat, slamming head-on against a soft, hot surface that felt differently from Lillian's doughy cheeks. This meaty wall felt smoother and firmer with a more rubbery texture to it. Its circular shape and various folds immediately gave away its true nature and the girl almost fainted from having most of the blood in her body leave her brain. She firmly held onto the twitching mass and dug her arms and legs into the nearest folds, which pinched them in response, holding them with an iron grip.
Lillian sighed in relief, she really needed to let that out and for a moment, all she could focus on was the pleasant feeling in her gut, which shortly after resumed its threatening rumbling, reminding her that she was nowhere near done. Just then, she felt something in the deepest recesses of her crack, something that seemed to have lodged itself right against her sensitive hole.
'Did I actually blow a hole through these panties? Damn, the girls' jokes aren't gonna be just jokes anymore' She thought, believing it to be some tiny fabric fragment because there weren't that many things that could easily reach so deep between those plus-sized cheeks. She was a bit curious still but as her gut hit her with some painful pangs she had to put those thoughts aside and all she could do was attempting to readjust her so-called panties, which were more of a thong as her immense cheeks greedily devoured its fabric in between. With barely any relaxation from her part, another monstrous fart erupted from her, shaking the entire bathroom albeit slightly.
The horny nun could feel for a split second that her nethers gushed out in absolute delight but that feeling was quickly overridden and overwhelmed when Lillian's hole abruptly opened up and unleashed a gigantic, rumbling blast just as powerful as the previous one but this time with her being right at the very source. The gargantuan torrent of hurricane-like winds blew so hard that her habits ended up getting nearly torn off while the smell felt as if it shot up her nostrils and caught her brain in a vice grip...
Meanwhile, back in certain classroom...
A tall, rough-looking girl with purple-dyed hair in a side ponytail walked into an otherwise empty classroom. While it was true that nobody was supposed to have homework during the first week, her case was a bit different as she was facing punishment for many misdeeds from the previous year.
She grumbled, cursing Principal Abalos under her breath for making her write all these incredibly long essays which were then checked thoroughly to make sure that she wasn't just copying info off the Internet or using any other ways to cheat her way out of this. On top of that, she had to write them by hand which meant that her right hand ended up hurting from all that seemingly endless writing.
As soon as she stepped into the classroom a thick, harsh stench assaulted her nose, making her gag and retch, which was already a bad sign. Not that many girls other than herself were capable of this so the list of suspect narrowed down considerably, and it'd narrow even further if she considered that many of those wouldn't even have the guts or wouldn't bother to try and challenge her in the first place.
She stepped back and took a deep breath, holding it before heading back into the classroom to find that her essay wasn't where she left it anymore. Looking down and around quickly revealed that the numerous sheets of paper were scattered all over the floor. Her heart quickened and she could feel the blood in her veins heating up while her fists clenched hard in sheer rage.
"FUCKING LILLIAN!" She yelled loud enough that her own echo hurt her ears a little. She tried to sigh but immediately coughed and gagged again as the stench lingered but she knelt down and started picking up the papers, knowing she'd have to reorganize them all over again all while plotting her revenge.
