FSE

Furry search engine

formerly SoFurry search engine

A Monstrous Coach

For SleepySushiRoll

By Draconicon

Having a monster for a girlfriend was something that put one apart from other humans, and not always in a good way. The minute that one was out in public with them, the rest of the world started judging, and if one was lucky, they had a monster girlfriend that was less likely to rip someone's head off.

Frisk wasn't so lucky with that.

"Hey, you want to keep staring? How about I rip your eyes out and glue them to my muscles, huh? See how long they last when I crush them!"

He rubbed his forehead as Undyne shouted at yet another human, this time the one that ran the gym that they were both supposed to be using today. He gently pulled her by the arm, shaking his head as he guided her away from the locker rooms and towards the actual equipment.

"Come on. You don't want to get us kicked out again, do you?"

"Hey, he started it."

"Well, let's finish it."

"By walking away like cowards?"

"No, by letting him be stupid enough to hang himself with his own behavior. He'll get in trouble if he treats monsters badly, and he knows it."

"Fine."

The piranha woman rolled her eyes, and suddenly she was pushing past him rather than being led by him. He wasn't surprised. The moment that she was distracted from her anger, she started thinking about something else, and despite the glares from the gym staff when they entered, she had been eager to find some real workout machines for weeks. The last three gyms that they'd tried had managed to loophole themselves into a human-only place, while this one...well, it had some bad staff, but the owner had managed to keep it open to both. It was better than the alternatives.

Frisk sat down at the free weight station, shifting his t-shirt over his shoulders so it wasn't digging into the side of his neck. His shorts pulled a bit tight, too, but that was the reason that they were there. He wanted to get in shape, and Undyne -

Click-thunk.

Undyne was trying to define a super-shape. She had just shoved the weight limit all the way to the bottom of the seated bench press machine, and was looking around to see if there were any more weights to add.

"Are you kidding me? You guys only go up to four hundred pounds?"

"It's a human limit," he said, blushing.

"That's barely enough to keep me where I am. I need more than that."

"Well, um, there's other options..."

"Fuck it. I'll start here."

The blue-skinned monster woman plopped herself into the machine, sitting down and cracking her knuckles. As soon as she grabbed the handles, Frisk saw her muscles bunch up. They were never going to be the huge muscles of a body-builder, or the sort of things that one saw at the Ms. Universe competitions, but they were still hard, corded and strong through her arms and legs. He'd felt those muscles around him before, and...well, they were as intimidating as they were awesome.

As she pumped the machine, however, he noticed something else. Something...different. Something that he hadn't noticed before.

Rather than her usual armor or baggy pants, Undyne was wearing tight shorts, tighter shorts than he was. And down there, between her legs...well...

Is that...is that a dick?

He'd never seen Undyne naked, so he never knew exactly what she had down there, but there was definitely something this time. It was pushed backwards, so it almost looked like nothing, but the harder that she worked the machine, the more prominent that it started to become. The tight black shorts seemed to frame it all the more, making it impossible not to stare at it as it grew bigger and bigger until -

Okay, yep, it was a dick. Frisk barely realized that he'd stopped pumping the free weight as he stared at her, his eyes locked with the bulge that was flowing out from between her thighs to running up her crotch. It wasn't exactly small, either; it looked like it had to be at least seven inches, maybe a bit more, and that was with the compression shorts keeping it pinned tight.

"Hey! Pipsqueak!"

Frisk jumped, looking up as Undyne stood up from the machine. Sweat droplets were running down her forehead, over her chest and between her breasts, and then further down. She gestured over her shoulder.

"You need to work out too. Come on. Let's get some squats in."

"Uh...squats?"

"Yeah. I'll spot you."

"Are you sure you're not going to kill me?"

"Come on. Like I'd do something like that."

"You tried the first time we met."

"That was then," she said, dismissively. "Now, come on, scrawny. We need to get you in shape."

He knew she was right about that part, but he also knew that she had a way of 'training' that tended to make someone wish that they were dead by the end of it. They were dating, and he hoped that meant something to her, but at the same time...well, there was every possibility that she'd use that as motivation to push him harder than she'd normally push herself.

Still, he had come here to get in shape, and he had no reason to not go along with this. He put the free weight back, shaking his head as he walked across the gym with her, followed by the stares of a number of different people.

She slammed about eighty pounds onto the already-heavy thirty-pound bar, and then pushed him under it. Frisk opened his mouth to protest -

SMACK!

Then yelped as Undyne smacked his ass.

"Hey!"

"Come on, squirt. You need to get in shape, and I'm gonna make sure that you don't take it too slow. Come on, come on!"

Blushing at how pushy she was - and imagining what would be happening if they had the gym all to themselves - Frisk crouched under the bar. He slowly pushed up, feeling the metal dig into his palms and shoulders, and braced himself for the pain of how much weight he was having to exercise with.

He almost tumbled over as soon as he stepped away from the brace bar, and he would have if Undyne hadn't been there to support him. He yelped as he almost fell over, holding the metal bar with a death grip, while she held onto part of the bar with one arm and him with the other.

"Heh, you're a wimp, you know that?"

"And you're...super-strong..."

"And?"

"Come on...be..."

He stumbled over his words as she pushed against him from behind. The feeling of her small breasts against his back was bad enough, but the feeling of the other thing? That was downright impossible to ignore.

Dick, dick, dick, dick.

And a fairly large dick, too, rubbing right against his ass. There was no way that was stuffing or something that she'd just shoved down her shorts. This was the real deal. His girlfriend had a dick, and...well, he was half-sure that it was bigger than his.

As he blushed worse, she dragged him up. As much as she was teasing, she was still helping him move, helping him actually exercise. He grunted as he went from a squatting position to standing again, only to drop hard as soon as she stopped holding him up. It was hard for him to keep any sort of balance with that much weight, and he kept having to lean back, feeling her cock against his ass, her breasts against his back.

She'd chuckle at him, teasingly, pulling him to his feet one more time before she helped him drag the bar back into place.

"Heh, if I didn't know better, I'd think that you were distracted."

"If I didn't know better -"

"Heh, do you know better, squirt?"

"..."

"Come on. Let's keep up this momentum. More exercise!"

...This is how I die.

The brutal exercise routines continued as they traveled around the gym. At every station, Undyne seemed to find some way to be both helpful and distracting at the same time.

With leg curls, she was 'helping' by dragging his legs up against the worst of the weights that she put on the machine, but she was also stroking his butt more often than he'd like. At the seated press, he swore that she was squeezing his chest while he was pushing, and excusing it by saying that it was keeping the muscles in the right place.

And at the standard bench...well...

He blushed when they were done, swearing that she'd slapped her bulge against his face on purpose, that she had been grinding against his cheek and nose the whole time just to mark her territory. That was impossible, he was sure; they were in public, and as abrasive as Undyne could be, she wasn't that cruel. Yet, at the same time...

He rubbed his cheek, and he definitely got some of that fishy, musky scent that he had gotten used to while living with her. The way that she worked out constantly meant that he had to get used to the sweaty smell that she had, but this took it somewhere else, somewhere stronger and different.

It was kinda hot and kinda embarrassing at the same time.

That said, he was more exhausted than anything. Undyne had pushed him through endless exercise, forced him to hit the gym harder than he had ever done in his life, and his entire body wanted nothing more than to get back home and fall into bed. He wanted to forget that the rest of the world existed, and just sleep for a while. He wanted...he wanted to just not move.

Yet, they still had to change, and...and shower.

And this would be the gym that had unisex bathrooms...

Frisk groaned as he walked towards the locker room with Undyne at his side, sagging and hunching forward while the fish woman was grinning with her towel wrapped around her neck. She was laughing, even, her sharp teeth on display as she pumped a fist in the air in victory.

"Hahaha! I forgot how good it feels to get a good workout. Man, I need to come here more often. And you, too."

"Yeah...sure."

"Oh come on. You know that you're just bitching."

SMACK! Another slap across his ass, and just like before, it got him moving...and blushing. After all those times where Undyne grabbed him and...teased him, this was getting to be a bit different than their normal antics. It was starting to feel like something else.

Yet, there was no time to question it. They were already in the locker room, and while they had changed with their backs to each other this time, Undyne showed no signs of turning around when Frisk walked up to his locker. He looked over his shoulder at her, blushing a bit.

"Um...aren't you going to turn around?"

"I'm your girlfriend. I get to look at what's mine."

She smiled at him with all her teeth on display, and leaned back with her arms crossed under her chest. Abs, chest, face; everything shined with the sweat that she'd worked up.

"Besides, this time you get to look at me."

"Um, I...um..."

"Heh, come on...change..."

She was staring at him like he had gone from boyfriend to prey, and he wasn't sure what to think about that. All he knew was that she wanted him, obviously, and there wasn't much he could do about that.

Restraining himself from looking down at her crotch again, he slowly pulled his t-shirt off, and then his shorts. He was soaked to the skin from the hard work-out, and he could feel her staring at him like a piece of meat. Her eyes were going up and down his back, maybe all the way down to his butt. And despite that...

Well, just like when he'd felt her dick rubbing against his ass, he was still a little turned on with the way that she was staring at him. He had never been interested in getting fucked before, but then again, he'd never thought that he'd be dating a monster girl with a dick, either. It was a day for new things.

Frisk hesitated for a moment with his hands around the waistband of his underwear. He knew that he needed to slip out of that so that he could shower, but...well...

"Okay, come on, squirt. Let's get this over with."

Undyne grabbed him before he could stop her, and she slipped him right out of his boxers. He blushed as she yanked them off his ankles, literally lifting him off his feet to take his underwear away. As she put him back down, it took all his willpower to not hide himself, and he had to look at the ground rather than her not to feel embarrassed.

His cock was starting to rise, too, which made it all the worse. He had about five inches down there, maybe six on a good day, and he already knew -

"Heh. Look at that. I knew I was the stronger person, but didn't know I was the bigger person, too."

She stepped forward, and he realized that she must have stripped while he wasn't looking, because her cock crossed his.

His eyes went wide as he stared at the blue shaft laid over his cock, the tip already wet with pre-cum, darker blue than the rest of the cock. It had at least two inches on him, perhaps a little bit more, and Undyne was not shy at all about grabbing their cocks together. She laid his over her cock, and then slowly thrust forward, grinding until her tip touched his balls. The fact that his cock didn't even come close to touching her was...well, it was a thing. A thing that made him all the harder, in fact.

"Heh. Looks like this dick is my bitch. Just like you, squirt."

"I'm not..."

"Heh, you're not? Come on. We both knew who was stronger..." She thrust forward gently, nudging his balls with her tip. "Now we know who's bigger, too."

He didn't know what to say to that, except to moan when she kept pulling their dicks together, grinding them together with slow thrusts that were insanely well-controlled. He knew how strong she was, how hard she could push, and he knew that she could hurt them both very, very easily if she lost that control.

Suddenly, she let go of her cock, but kept hold of his.

"Let's get in the shower, pipsqueak."

"Wha -"

"Heh, I got a fun idea here..."

Oh great. Fun. He didn't know if that was a good or bad thing, but knowing her, it was going to be extreme.

They were alone in the locker room for now, but he had no idea how long that was gonna last. Even so, he blushed worse than ever, his cock throbbing harder and harder as she led him to the shower. She pulled the knob for one, getting some hot water running, but she didn't step under it yet. Instead, she leaned against the wall, her arms up, hands behind her head, posing with her back arched and her breasts thrust forward, her cock the same.

"Frisk?"

"Y-yeah?"

"I'd like a tongue-bath before I get in the shower. You think you can give me that?"

"What...right now?"

"Yeah, right now. If you think you can."

There was the slightest crack in her voice there, almost like she was -

Oh. He got it. She was pushing, now, but she still worried for him, worried about whether she was pushing too far. She wanted to make sure that they were both happy, both okay with this, but didn't want to break role.

That, of all things, made him smile. He nodded, closing with her and gently kissing along her abs. The salty taste of sweat, the little bit of fishy undertones, all came together to make it a bit embarrassing, but...well, still sexy.

"Mmm...come on...put that tongue to work..."

She rubbed his head, guiding him along her stomach, along the lines and curves of her ab muscles. He stuck out his tongue, letting her use him as a licking machine, dragging his tongue over her body and then up along her sides. The taste of sweat was stronger the further up he went, and he blushed as he was dragged up to her armpits.

Thankfully, he only had to lick her twice there before she pulled him towards her chest, burying him against her breasts. She rubbed them against his face, pulled him between them, drowning him in blush flesh and soft, powerful musk. He groaned, his cock twitching against hers, and she chuckled.

"You really are a perv, squirt."

"Mmmph."

"And you're gonna show it another way, too."

"Mmmph?"

"Yeah...on your knees..."

Almost before he knew it, she turned them around, him pressed against the shower wall, her under the stream of water. That big blue cock pressed against his lips, and Frisk's eyes went wide. He looked up at her, and then back at the shaft. Her body would block anyone walking in from seeing him at first, but...but it meant that he wouldn't be getting up again until she was done.

And in a way, he was fine with that. He...he liked this side of her.

So, he opened his mouth, and down the hatch it went. Undyne groaned, and he swallowed...and swallowed...and swallowed some more...

The End

Summary: Frisk and Undyne are dating, and they decide to go to the gym to start getting in shape - in his case - and to stay in shape - in hers. However, Frisk finds out something that he didn't know about his girlfriend, and she decides to push the envelope.

Tags: shemale/male, femdom, Undyne, rule 34, Undertale, gym, musk, sweat, shemale, locker room, cock comparison, frotting, oral, blowjob, shower, tongue bath, licking, worship,