Gaining Glutes (TF Story)

Story by mzmm on SoFurry

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A YCH done for Lengban. Leng has been going to the gym for a while, but today he's caught the eye of a certain deer...


?Leng whistled a jaunty little tune to himself as he pushed open the front door to his local gym. It was the first day of his second week of going to the gym, and he was feeling better and stronger than ever. His mood had improved, he started getting better sleep...it was honestly crazy how much this one thing had affected his life! The mowger was in high spirits as he made his way over to his usual bench, stretching and getting ready for his routine today...before he saw somebody.

That cute deer. He had seen him come in a few times over the past week, and Leng...well, he had developed a crush almost immediately! Honestly, seeing him was one of the reasons he had been so consistent with his gym attendance in the first place, even if he thought it was a bit weird to say so...gosh, this past week he had spent so much time watching the deer work out as he did his own routine. It helped the time pass so much faster to be daydreaming in a completely different world, thinking about cuties like him...

Oh well. The mowger was far too shy to walk right up to the deer end start chatting, so, it was just another one of the mewse's crushes that would never really go anywhere. Leng started to set up his equipment like usual, getting ready for a run on the treadmill...but before he could start, he heard a voice.

"Hey! Can you come over here?"

Leng was almost daydreaming already, so the sudden question aimed in his direction kind of startled the mowger a little bit. He looked around, seeing if he recognized anyone that would be trying to call his name...but there was nobody else here. He deliberately came in at a certain time of day to be as alone as possible...but that deer must have been doing the same as well, since he always saw him around this time. So there was really only one person he could have been talking to!

Leng looked over to the deer, who was standing to the side of one of the rep benches in the gym, staring back at the mowger and waiting for some sort of response as he watched Leng stumble his way off of the treadmill. "Uh-yeah! What do you need help with?" Leng asked as he walked over, still a bit of stutter in his voice. He had just been daydreaming about the deer, and now he was getting to talk to him - and Leng didn't even have to initiate the conversation!

"Yeah. Name's Neil. I usually have a friend coming to spot me when I'm doing reps, but he's sick today - do you mind filling in for him?"

Leng stood there for a moment. He wasn't really used to all the lingo that was being thrown around in the gym yet, so the mowger wasn't exactly sure what he was getting into! But, he was being offered by his crush to join him and help him out...and he got his name, too!? Why, of course he'd help Neil out! and maybe afterwards they could go get dinner, or hang out in the park, or maybe see a movie -

"Oh! Uh, yeah, I can, uh, definitely do that...um, you'll have to... tell me exactly what to do, though." the mowger sputtered out, making himself look like a bit of a weirdo in front of Neil! "And! I almost forgot! My name's Leng."

"Leng!" Neil chuckled as he heard the name. "Well, nice to meet you - and don't worry about that. It's pretty easy, so I'll tell you exactly what you need to do...first, just lay it down on this bench while I get my weights set up..." the deer said, a smile on his face as he offered the bench up to Leng like it was a couch or something. He walked over to the weight rack while Leng seated himself, finding the squish of the padding on the bench to be actually quite comfortable! Made sense, considering somebody would be lying here for quite a while while they lifted weights...

Neil came over a few moments later, racking a weight on the structure sitting behind Leng as he loomed over the mowger with a smile. "Now, I'm just going to need you to keep an eye on my form and such while I lift these..." Neil said, before turning away from Leng, revealing to the mouse that he wasn't wearing any pants! Leng could see the deer's thick, soft cheeks, and, wait, were they getting closer -

*fwmp.*

Neil chuckled as he sat right down on Leng's face, putting all of his weight on to the poor mowger as he swung his legs around and rested them on the bench! "Pfft. That was easy." Neil remarked as he lay back quite a bit, feeling his new seat squirming quite a bit underneath his rump, getting him a little bit randy as it happened! The deer leaned back even farther once he was in a comfortable position, grabbing the racked barbell with both hands and slowly lifting it up off of the metal bar it was resting on.

Leng's brain was suddenly assaulted by all sorts of new sensations as his new friend pressed even more of his already impressive weight right down onto his face! A thick, musky odor filled the mowger's nostrils with every breath he took...which wasn't many, considering how thin the air was down here. His muzzle had found its home wedged right between Neil's cheeks, which honestly felt quite warm and soft against his face...if it wasn't for The extra 200 or so pounds of chubby deer resting on top of him, this might actually be quite comfortable for Leng! As it was, the pressure on top of him was pushing the little mowger all the way down to the metal base of this bench the two of them were sitting on. Not the most comfortable set up in the world.

"Hhhff...one." Neil said to himself as he brought the barbell to his chest once more, having only finished the first rep of his set. He was using the heaviest weights he had yet today, so he could really feel his body being pushed to the limit even after only one repetition! He coule still feel Leng squirming down there, the little mewse wedged right between his asscheeks, Leng's nose even occasionally scraping against his pucker hidden behind said fat cheeks. "You're doing great down there, Leng!" Neil said, not hiding the sarcasm in his tone as he felt the mowger squirming and wiggling underneath him still.

With every rep the deer made, it only got tighter and muskier and sweatier underneath him...the assault on all of Leng's senses was starting to make him a bit dizzy. He couldn't hope to push someone that was so much bigger and chubbier off of him, so he was left to only whimper and wait as Neil continued his workout. A small part of him thought this was actually what spotting was, but the larger part of his brain knew from Neil's tone that he had been tricked into being under here! Neil must of seen him staring at some point or something...god, it was so hot underneath here. Leng's cheeks flushed red as Neil's musk only continued to grow stronger and stronger; he didn't want to admit it, but the tiger was starting to feel a bit aroused from all of this!

Though this all felt quite nice for Neil, he wasn't just aiming to get a free seat and a little bit of teasing out of the mowger while he worked out. No, he knew that all that pressure down there would start to make something special happen! He was looking to make his rump a little fatter, and what better way to make sure that all of your food goes right to your ass then absorbing your meal directly into your rump? Already the process was being set in motion, Leng starting to lose feeling in his face as Neil wedged the mowger right up against his asshole, teasingly clenching and relaxing it as he felt Leng starting to merge with him, being absorbed into his already squishy rump...

If Leng was confused when this all started, then he was downright dumbfounded at what was happening now. He had lost most of the feeling in his face, and even though he wasn't moving, it felt like he was just sinking deeper and deeper into Neil with every second that passed! The deer's religious repetition of what rep he was on (about 12 now) was becoming more and more muffled as Leng felt the sensation of being sucked even deeper into Neil's body...it was so odd. He could feel the cheeks that were smothering him growing and swelling and becoming even fatter than they already were, and at the same time, he was starting to lose feeling in more of his body...was he passing out from the lack of air or something? Hallucinating? Was Neil's musk really that strong?

Of course, the real answer was far more crazy and out there than what Leng could possibly imagine! Neil could feel the growth down there as well, a smug smile on his face as he imagined just how much the mowger would add to his ass. Barely anything? A few pounds? 100 pounds!? Oh, goodness, his imagination was running wild right now! Leng had completely disappeared from Neil's sight as he completed his 13th rep, the deer teasingly clenching his pucker a few times as he felt his ass just continuing to grow and become fatter. "Aaaaalmost done down there, Leng~" he teased...well, done certainly had a different meaning in this context!

Leng couldn't feel anything at this point, really. He was so deeply wedged into Neil's ass, everything was pitch black around him...it felt like he was floating. Floating in a sea of deer chub and musk and sweat and all sorts of other horny things. An intense pleasure radiated through his consciousness, the better part of his brain giving up any survival instincts and just letting that tiny part of the mowger that was so, so into this take over...he swore he could feel himself blushing, even though there wasn't really any part of him that COULD blush anymore! And throughout all of this, Neil kept on, doing rep after rep until he felt like his body had finished the job.

"Th...thirty." Neil mumbled a few minutes later, his arms feeling like jello as he finally racked those weights behind him and sat there for a few moments, huffing and puffing and feeling his body tingle with every breath. "Fuuuck, that might have been a bit much..." he said after a bit, before slooowly moving to the side and starting to get up off the bench. At the same time, Leng felt the darkness surrounding him suddenly fade, replaced by the red cushion of the bench as he was lifted up by something. As Neil walked over to somewhere else, the mowger was trying to figure out where he was - every step Neil made caused his whole perspective to shake, to the point where he could barely focus...

'Till Neil looked in a mirror. Staring back at Leng was nothing but gray, spotted, thick rumpcheeks, even larger and softer-looking than when he was looking at them (and being smothered by them!) earlier. It was then that he realized where he was...and, even though he was just padding on this cute deer's ass, something to be squished and pinched for the rest of time...he was happy.