Endurance Training (Mia/Reader from Fire Emblem Heroes) (Patreon)

With a training sword in hand, you aimed true and struck at your opponent… only for your strike to be countered by the swift slice of another blade striking against yours, the intersection and power behind the countering blow too much for you to hande.

This was a losing battle. Sure, you didn’t exactly have much expertise when it came to swordplay, but you were at least hopeful you could outmaneuver somebody who was half your size. Unfortunately, Mia possessed a shocking amount of strength. 

Taking a step back, she demonstrated not only her power, but her amazing agility, clashing against your sword with so much might that it hindered your balance. Eager to not even give you a chance to counterattack, Mia continued her relentless assault—all with an enormous smile on her face.

At long last, Mia secured her victory with one final horizontal slice, sending you tumbling down towards the ground.

It was a good thing you were using training swords.

“Heh,” she smirked with pride, dropping her blade and placing her hands on her hips triumphly. You exhaled a few times, gazing up at that confident expression of hers. “Not bad, boss, but you’ll have to do better than that! A lot better!”

If there was one positive thing to say about the situation, it was that nobody was around to see your embarrassing defeat.

Mia was a stubborn thing, insisting that she sparred with you frequently. Allegedly, she was convinced her eternal rival would appear before her wearing white robes on horseback—or something like that. It was a fortune she had been told about in Tellius, and it just so happened that on the day of her summoning, you had been riding a horse. 

The one time you decided to do that too!

The summoning session that called her to this world was intended to be a hasty one; the enemy was crossing deep into Askran territory and the Order of Heroes was too spaced out. Relying on summoning new heroes as reinforcements was an unconventional move, but a necessary one at the time.

Mia had been forbidden from participating in that fight, those present—including yourself—underestimating her due to her size. Fortunately, her disappointment was short-lived once she realized you matched the description of her so-called eternal rival.

Because of this silly little fortune, she refused to leave you alone, insisting you fought her day after day. Naturally, you refused every single time.

You were not good with a sword. You could aim well with the Briedablik and use a bit of magic. That was about it though. Your calling was summoning and leading if anything—not being on the front lines.

Did your insistence about that stop little Mia though? Absolutely not.

While she understood you were not good with the blade, she saw the lack of skill as a challenge. If you were to be her arch-nemesis, you had to be good, and if you weren’t? She’d have to teach you to be good! 

At the time, you didn’t think much of this statement. She was an adorable little thing, after all. That was why you agreed to these little tutoring sessions, believing they would humor her. Truth be told, you thought it was just her way of asking for company, and there was no harm in giving her that.

Underestimating her, however, proved to be a terrible mistake. She was stronger—FAR stronger than she looked, and when you faced your first defeat, you learned NEVER to judge a book by its cover.

Since then, your ass has been kicked too many times to count.

“Sorry, Mia,” you rose to your feet, wiping away some of the dirt on your robes. “I think I’m getting better, but you’re just… ridiculously good.”

“But you are getting better!” Mia recognized your disappointment, and despite feeling unbearably giddy and prideful about her victory despite the easy challenge, she wasn’t going to let that stop her from making you smile. “You’re really impressing me with how much stronger you’re getting, boss! I could feel a lot more force in those hits!”

“You really think so?”

Mia was strong and fierce… but she could be so sweet at times. You liked that contrast.

“I do!” she nodded her head, but when her smile transitioned into a mischievous smirk, you found yourself subconsciously biting your lip. “But you know, boss… we’re not done with our training yet… isn’t that right?”

You weren’t sure if that sultry tone of hers was to blame, but you were beginning to notice just how sweaty she was all of a sudden. It was a little unusual—had you really worn her out that much? Were you actually getting good?! Her saying it was one thing, but actually believing it yourself was another.

It was fun to entertain such a notion, but it was far more thrilling to theorize why she was blushing so severely. Had the sparring done all that?

Heh. It absolutely hadn’t. That blush? All from a particular set of thoughts that always entered her mind after a hot and sweaty training session.

“You’re right,” you spoke softly. “We’re not done, are we?”

Mia giggled, taking off towards the direction of a certain room, and you followed after her. There was no need for any more words. This was all routine by this point.

It had happened many sparring sessions ago. Mia had gotten a bit carried away and beaten you up a little too badly, and upon recognizing that, she was determined to make it up to you in some form. 

Once she made this declaration, you insisted that there was no need to make amends. You had signed up for a little rough play, after all. You could handle a bruise here and there. It made her happy. That was what was important.

But she was far too stubborn to accept such an answer.

Mia ultimately discovered something she could do after another sparring session. When she knocked you down, you accidentally grabbed onto her, pulling her down with you. 

Because of that, she ended up resting comfortably on your lap… and well, an adorable girl doing such a thing while looking all hot and bothered? 

It was bound to cause a reaction.

It was strange to see her look so captivated by the feeling of something pushing up against her. She had genuinely been fascinated by it, and she certainly wasn’t oblivious to what it all meant.

…and now, it was time for her to demonstrate some of the skills she had learned since that fateful day. 

You barely had time to lock your door before she jumped into your arms, ambushing you with a powerful and passionate kiss that was difficult to fight back against… though not impossible. 

It was in this bedroom that the tables turned. She was the one learning, and you were the one teaching; therefore, it wasn’t long before the battle of tongues tipped in your favor. She ultimately conceded, pulling back as she breathed heavily, not afraid to show that she was drooling a little. 

“Are you ready for some endurance training, Mia?”

She nodded her head with the greatest grin she could muster. “Mmhmm!!”

Mia was the one who insisted on calling this… “training”. She found it fun—and you couldn’t deny you felt the same. Once you were both out of your clothes, Mia wasted no time in straddling your lap as you laid down.

The specific term you used to describe this form of training started to make more sense when she raised her body, positioning your erect cock over her soaking snatch, ready to mount it. The difference in size was never more apparent during those moments. It was miraculous to think she could take it at all, but this was Mia at the end of the day. She could take it all.

“Your sword is so big,” she giggled, her inflection fun and mischievous, but undeniably coated in arousal. “And so hard… but I’m going to defeat you here too!”

“Is that so?” you played along with her antics. “I’d like to see you try.”

This wasn’t the first time she had made such a declaration, nor would it probably be the last. Regardless of the outcome, you were always keen to not only watch such a captivating display, but feel that amazing pleasure that you doubted would ever be beaten.

Slowly but surely, Mia lowered her body. Once the head of your cock slipped inside her pussy, enveloping it with that absurd tightness you knew and loved, you exhaled.

Your adorable lover heard the reaction, using it to fuel her efforts as she took in more and more of your manhood. It was still astonishing that something so small could take a cock like this. You really couldn’t wrap your head around the concept. 

The clutch her walls had around your sensitive shaft was extraordinary, but you wouldn’t trade such an overpowering pressure for anything else. It really was that good.

Mia was able to take everything in, and upon doing so, she breathed deeply. You could tell she was still feeling overwhelmed by it all, even after the many times you had done it, but that was something she wouldn’t admit! Regardless, Mia was undoubtedly satisfied she had taken it all in, and at record speed too! 

Your lover grinned with glee, and it was a smile you met with one of your own. You were glad she could take it all, not just because it felt heavenly, but because you were addicted to seeing that dick-sized bulge in her tummy. You could see just how much was inside her—and that was the hottest thing.

“I feel so full…” she continued to breathe, getting accustomed to this sensation. Of course, Mia had no plans on staying idle for long. Training required actively moving one’s body, and she knew how to do that very well.

Leaning forward and placing her hands on your chest for support, she began lifting her body, releasing some of your manhood from her grip… only to slam her body back down. The ascent was teasingly slow, but the descent was anything but. It was a phenomenal thing to experience and you were thrilled to witness her repeat it over and over, ramping up the speed as she got used to the pressure.

During this entire process, she refused to stop smiling with joy. Be that as it may, there were times where that grin of hers was on the verge of breaking. Mia wasn’t opposed to becoming a moaning mess by any means—just not immediately. You watched her petite figure with awe, the bulge in her stomach the main focus, though sometimes your eyes did drift to her budding breasts. 

“Y-Your sword won’t be defeating me today,” she proclaimed. 

Mia was always the victor when it came to traditional swordplay, but the same couldn’t be said about this unorthodox form. 

Her objective was simple—endure long enough to make you cum first. Accomplishing such a feat would make her the winner. If she could hold back her moans while doing so? That as a bonus!

Hpowever, if she were to cum first? That would make you the winner.

She had quite the difficult task to accomplish, but Mia lived and breathed challenges.

While her side of the game was more arduous, that didn’t mean things were easy for you by any means. It took an astonishing level of willpower to hold back the urge to cum, and honestly, who could blame you? The thought of filling up was just so thrilling!

But you had to persist! You wanted to win something today! Once she came, you could stop holding back and paint her womb white. Even so… god, was it tempting to just let her win anyway.

This time, Mia was demonstrating an incredible level of swiftness as she rode you. Her strategy was going to wear her out a lot sooner than usual, but that mattered little if it was effective enough to make you cum fast! 

“Fuck…” you couldn’t help yourself! It was challenging to think of a word to describe the pleasure you were experiencing. Mia was slamming her hips down on your crotch at such a breathtaking pace, after all. She was a prodigy—at swordsmanship and sex! “You feel so good, Mia…”

“Aaaah… ahh… I feel… really good too…!” she struggled to speak. “I love it… I love it so much… your coc-- I mean… ah… sword… ehehehe…”

Despite her enthusiasm, she found saying certain naughty words a little embarrassing. How ironic that the acts themselves never called forth the same feeling. It made sense though. Mia spoke with her actions. 

You could tell this was going to be a close battle. Your climax was building up fast, but her euphoric expression made it painfully obvious she was reaching that stage as well. Despite knowing that, she continued to ride you with all her might. She knew your weaknesses; the more your cock nudged against the entrance to her womb, the more pleasure you experienced, and that meant bringing you to her peak sooner! 

However, despite her best efforts, this was not her day. Her walls suddenly clutched strongly against your manhood, locking it in place as she screamed your name. She knew she had lost, but it was hard to care during the moment while bliss coursed through her body. 

Though she had been defeated, she was rewarded with a consolation prize in the form of your climax. Her own climax was magnified when your warm seed filled up her womb within seconds. The two orgasms were borderline simultaneous, and though she had reached that point first, feeling that amplification to her pleasure truly felt like a worthwhile reward. You hoped it would give her the encouragement she needed to finally win next time, for it would let her experience these sensations in reverse.

Mia soon collapsed, ultimately unable to withstand everything her body was going through.

Despite it all, she was still smiling with glee, her giggling suggesting she wasn’t down for the count just yet. Though she was small and cute, she was not to be underestimated in any capacity. That was a lesson you had learned many times by this point, and frankly, her lust was sometimes a little scary.

“You did well, Mia,” you complimented her, stroking her hair gently. “I’m very proud of you.”

She took a while to get her bearings, but upon doing so, she started to laugh. “Heh… the training… isn’t over yet…”

“Oh?”

You knew it wasn’t over, of course. It was just fun to hear her ask for more. Would she ride you again? She genuinely looked like she didn’t have an energy left, so it was possible she’d ask you to take charge and—

“I want you to fuck me…”

Heh. There it was.

You should have known.

Mia adored riding you. She genuinely saw it as not only a form of bliss, but a way of training her stamina.

But that didn’t mean she didn’t like to indulge in something that was for purely pleasure. Sometimes, she just wanted to be fucked silly. She was a little lady with needs and not everything could align with training. 

Once she stumbled off your body, she was quick to get into position-- or rather, crawl into position. You did the same, ready to take her from behind… but as you admired her ass, you noticed something rather unusual.

Something very unusual.

“Heh,” she snorted, noticing your pause. “Did you see it?”

“...I did.”

You took a moment to respond… because you were honestly rather shocked!

Mia’s pussy looked so appetizing; it was leaking your cum, and you wanted nothing more than to let out another load inside it.

But your eyes were far too occupied by the object currently inside her ass. 

You knew what it was, and you had many questions in regards to how she managed to acquire such a toy. Most importantly, you knew what it signified.

But first, you had to quench your curiosity. “How long have you had that in there?”

“Since before we sparred with each other,” she answered. “Guess I’ve been using a handicap all along, haven’t I? Ehehehe~”

What a girl.

You really wanted to know how this girl managed to get her naughty hands on a buttplug, but at the same time, your priorities were elsewhere. This naughty girl had communicated a desire for her ass to be fucked without saying a single word. 

What. A. Girl.

“You really do scare me sometimes, Mia.”

“I know,” she laughed. “But don’t leave me in suspense! Pull it out! I want you to put something different in there, after all. Something a loooot bigger~”

Wow.

When had this girl become such a naughty thing?

More importantly, you weren’t going to reject such a naughty request.

You did as she asked, albeit slowly, understanding at the very least that such an action couldn’t be done carelessly. It was a surreal experience, knowing full well what her intentions were and what was about to happen. To think—she had gone out of her way to prepare something like this! It was absurdly hot.

How long had she wanted it in this hole? You supposed that was another question you could find out the answer to later. You had a cute butt to fuck first.

Once the buttplug was released, Mia sounded genuinely relieved.

“I feel empty now,” she giggled.

“Let’s fix that then, shall we?”

As you aligned up against her rear, you marvelled at the view for a moment. Her ass was going to be one heck of a tight squeeze, but she had done everything she could to ready herself for it. Determined to satisfy both curiosity and lust, you nudged your cock against her backdoor, feeling her shudder at the sensation. Those trembles multiplied as you pushed, putting pressure on her entrance. 

Although it had something inside it mere moments ago, her ass was surprisingly resistant—but it wasn’t impossible to breach. Your head soon slipped in, her rear unable to withstand the force of your cock for that long. Mia quivered, but when she gazed back at you with a look of need, you knew she wasn’t going to be happy if you went easy on her!

You found a balance with your pacing, exercising enough restraint to not overwhelm her—but not enough to make it seem like you were treating her delicately. Mia reacted wonderfully as your manhood sunk inside this new and exciting hole, the tightness unlike anything you had ever experienced. Her backdoor was squeezing your member viciously, as if it was desperate to force out the foreign object that didn’t belong. Alas, it simply stood no chance against the might of your member.

Mia’s ass felt incredible, and that was a thought that stuck at the forefront of your mind as it finally took your entire cock. An absurd heat suffocated your cock as you momentarily paused, taking in this exotic feeling, not wanting to forget the first time you took her ass. 

It felt so, so good. So good, in fact, that you almost forgot this was probably an evem more overwhelming experience for the recipient!

“Mia… how are you holding up?” you asked, noticing she was being silent.

She gazed back, looking so worn out yet so pleasured. “I said… I ah… felt really full earlier… right?”

“That you did.”

“I… was wrong…” she continued. “This… this… is what it feels like to be full up…”

This girl really had a way with her words, didn’t she? You loved it.

You had yet to begin properly fucking her ass yet, but already you had a suspicion you were going to grow addicted to this sensation. Feeling this much tightness around your cock… it was honestly quite absurd. A good absurd, of course.

This was going to be a battle she was going to win, wasn’t it? At this rate, you were going to cum in no time.

But that was fine. You honestly didn’t care about losing! The mere thought of filling up her butt… it was almost enough to make you cum right thee and then.

“What are you waiting for…?” Mia noticed your lack of movement. “Go on… fuck it… fuck my tight little ass~”

Such an invitation could not be ignored. 

Taking a firm hold of her hips, you started to pull out, astonished at how mercilessly strong her backdoor was against your length, even now. Once you were satisfied you had pulled out enough, you slammed your hips forward, her walls completely surrendering to the might of your cock as she screamed with degenerate joy. 

You almost regretted being so swift, forgetting during the moment that this could be a painful experience if not done correctly.

But your fears were put to rest very quickly.

“F-Faster~”

You had forgotten in the moment that this was Mia. She could handle a little pain—a little rough play. She liked it, even. 

Therefore, you complied with her request, repeating the process with even greater strength and agility. Within moments, you had built up a rhythm, fucking her ass savagely.

There was no mercy in the bedroom today, but that was precisely what she wanted. At no point whatsoever did Mia demonstrate any discomfort, even as you got a little carried away with your motions. Who could blame you for doing so when her moans were nonstop? Mia only occassionally broke her divine chorus, encouraging you with words that echoed within your mind.

“Harder…”

“Faster…”

It was amusing to think that mere moments ago, she had beaten you so effortlessly during your sparring… and now, here you were, completely dominating her with some rough ass-fucking. 

You couldn’t stop. You didn’t want to stop. It felt so incredibly good. Watching your cock sink so deeply her butt was addicting. Listening to her screams of delight was addicting.  Feeling that unparalleled pressure bringing you closer and closer to your climax despite cumming only a few minutes ago was—you guessed it—addicting! 

Mia’s ass was on a whole other level—and this was not going to be the last time you fucked it. You hoped she was ready for this to become a frequent activity.

“I love it!!!” Mia cried out, as if she was agreeing with your thoughts. “I love your cock in my ass much!!!”

The complete abandonment of her personal terminology gave you your answer. She was just as addicted to this as you were, having surrendered herself to her arousal long ago. You couldn’t beat her with a sword, but you could beat her with your cock.

Just as you believed the pleasure couldn’t get any better, you finally reached your peak. You did not hesitate whatsoever to push deep inside her one last time, letting out everything you had left deep into her ass. 

Mia cried out with the utmost joy, her volume reaching new records. Something about feeling that warmth deep inside her rear end had invoked a primal pleasure, and she was riding that high for as long as she could.

You were a little worried you’d probably get a knock on your door shortly inquiring about the sounds of a screaming girl coming from your room… but you could worry about that later. 

What mattered right now was this pure, unadulterated euphoria pulsating through your very being as you filled up this adorable girl’s ass for the first time.

The first of many times. The first time today, perhaps!

The moments that came after were blurry, but you were somehow able to pull out of her despite not wanting to. It wasn’t all bad though—seeing your cum pour out of her was immensely satisfying. Her ass looked fucked too, and that was amazing to witness.

Mia was on the verge of passing out. She was breathing so much as she gradually tried to pull back your covers and slip into your bed. It was a worrying level of exhaustion

But like always, she quickly put your fears to rest.

“Heh…” Mia forced one quiet giggle out. “I really, really liked that training session, boss… let’s do it again sometime~”

You and her were on the same wavelength, and that was proven even further when she closed her eyes and started to relax. 

A nap sounded good, and what more could you ask for than to cuddle up with your favorite girl? You did just that, and she purred upon feeling your arms wrapping around hers. She was a little weak when it came to spooning. That was a secret only you knew about though!

…as you drifted off to sleep, you couldn’t help but wonder if the shenanigans would continue after this quick nap. 

Ah, who were you kidding? Of course they would.

You were also going to assume that nobody would investigate the noise. Your thoughts would be happier that way!