Chapter 3 - Testing Things Out

Mina stood nervously, albeit determined, outside of Miruko's hero agency, the car from UA driving her away and leaving her to go into the building where she would soon begin her internship with the one and only number 5 hero of Japan herself. Something that Mina herself couldn't quite comprehend, even now. The events that had gotten her to this point were almost like a dream for her at this point as she thought back on them. 

But rather than stand outside the building awkwardly and think about what happened, Mina took a steady breath before making her way forward, readying herself for anything the bunny-themed heroine might have in store for her. "It's gonna be ok. Just act like you usually do." Mina tells herself.

It was obvious that the bunny-themed hero wasn't going for the most tight-collar type of hero agency, the kind of place where you had to always act like a professional. It was a relief for sure for Mina, given the fact that she doubted she would've been able to handle something like that. Still, it was hard not to be nervous, even after everything she did with Miruko.

Walking past the front desk to the elevator, Mina entered the lift and began her journey to the floor where she would be working for the foreseeable future, the same floor as Miruko's. This was it. She was a sidekick to Miruko. Mina had to stop an excited scream from exploding past her lips as the thought passed through her mind.

The circumstances, while strange, weren't anything the pink heroine was going to complain about. She got to score with Miruko of all people, a feat that people across the world wished they were able to say they'd done, and Mina actually had.

"AHHHHHHHHH!!!!" Mina jumps with excitement, unable to stop a happy scream from leaving her lips before she quickly covers her mouth with her hand, quieting herself down even though she feels like screaming again.

Once the elevator had come to a stop, Mina Stepped out of the elevator only to marvel at the size of the operation Rumi was working with. It was grand, full to the brim with female employees, making the pink heroine in training wonder if Miruko ever got freaky with any of them the same way that she brought with her. That thought alone sparked waves of arousal through her core, but for now, she stuffed those thoughts to the side for the time being as she made her way forward, walking past the strangely empty front desk before looking to find where her mentor's office was.

It took her a second, but once she was there, she steadied herself once again before extending out her hand and knocking. "M-Ms. Miruko?" Mina calls out, pausing for a second to listen for anything behind the door. "It's me, Mina."

"Yeah! Come in!" Miruko calls out, giving Mina the go-ahead to enter and come to the sight of the one and only Miruko sitting behind a desk, wearing her hero uniform. "Ah, finally. I was beginning to think you weren't going to show." Rumi smiles with her usual smug look, leaning back in her chair and letting her chest move forward, sparking more embers of arousal throughout the pink heroine.

"Ehe, yeah, I may or may not have overslept." Mina smiles sheepishly. It was true, although the pink heroine did leave out the reason why she overslept in the first place.

"Hmmmm." Miruko hums, her eyes falling over Mina's form, almost like she was looking at a piece of prey, although it didn't seem all that serious. "So, I'm guessing your hero outfit's in there?" Miruko points a finger toward the briefcase Mina held, causing her to jump slightly.

"Oh! Yeah! I bought everything, just like you told me to." Mina smiles, feeling happy that she would be able to act so confidently around Miruko, of all people.

"Good girl." Miruko remarks, her comment causing Mina's face to flush slightly red. "How about you head on over to the gym, and I'll meet you over there. Just gotta handle a few things real quick, and then we can get started."

"Ok!" Mina shouts happily back before quickly departing out the door she just entered.

"Heh, this is going to be fun." Rumi mutters under her breath, leaning back in her chair to take everything in. Despite a rough and boring start, things were slowly coming together. People were joining her hero agency, more doors were opening for her, everything seemed to be looking good. Inko Midoriya sucking her cock under her desk was also pretty cool.

"Alright, slut, let's try to wrap this up quickly, I gotta go train my new recruit." Miruko remarks before reaching out and grabbing a handful of the green-haired woman's hair. The milf's dark green eyes nearly hearts as she gazes up at Rumi with nothing but pure and utter love.

Rumi knew that sooner or later, she'd have to find a more personal secretary, someone to work almost directly alongside her as she tried to figure out this whole hero agency thing. So when she found Inko Midoriya, she thought she was a good fit. Seemed to handle the workload effectively and interact with her co-workers fairly well. It wasn't until the smaller woman approached her with a proposition to help her destress that Rumi knew she had a keeper on her hands.

Someone who would prove themselves to be quite vital also to Miruko's more personal plans as she began to throat fuck the Inko's face, pulling her head up and down her cock, causing her balls to slap the underside of her chin with every repeated movement of her head downward.

"GLKGLK! GLKGLK! GLKGK! GLKGK!" Inko gurgles. At that point, her hand was between her legs, fingering herself happily and leaving a small puddle underneath her. Something that Miruko didn't mind in the least, the fact that Ms. Midoriya found herself doing something like that while she fucked her mouth only seemed to enhance the experience for Rumi, causing her to buck her toned and muscled body even harder into her face. 

However, just like she had said, Miruko had to finish things up quickly; while she was more than happy to receive a long and stretched-out blow job, blowing countless loads down Inko's throat, she didn't want to leave her new sidekick waiting for too long. However, after their first meeting, Rumi had a feeling that the pink heroine would be able to understand. Still, speeding up her hips as fast as she could make them go, ravaging Inko's throat the same way that she would fuck a pussy sending one final thrust and finally bursting, spraying the inside of Inko's throat with cum.

"Ah, perfect as always." Miruko remarks, slowly retracting her cock from Inko's mouth until only around half her cock remained past her lips; only then did she suddenly pull her hips back, getting that pop of her lips that the bunny-themed hero loved to hear.

"Thank you, Ms. Miruko. I'm always happy to ease some of that stress off your shoulders." Inko says slightly in-between coughs as she catches her breath; while she might've been fairly experienced, or at least from what Rumi could tell, even she had her limits as she wiped her face up. Making sure to clean up her face as best as she could while Miruko made her way toward the door.

----

At the last second, Mina dodged as a robotic foe flew itself toward her, aiming to knock her to the ground, only for the pink heroine to suddenly spin on her heel and fire off a volley of acid toward it, melting it down to nothing but scrap. However, before she could even rest, another robot, this time taking up a vantage point above her, fires down a blast. Causing her to leap forward just in time.

While Mina might've not been the smartest person in the world, she was still quite the capable hero, enough so that she knew what to do at that very moment was to suddenly press her hands together, creating a more concentrated blast of acid that easily cut through the pillar the robot was standing on, causing to collapse and fall on top of another robot that had tried to sneak up on her, something that the pink heroine totally predicted and totally didn't NOT see it sneaking up behind her. 

"Not bad, Mina." Miruko congratulates her sidekick, observing her work with the robotic training dummies. It was obvious that Mina had potential. "Some might think having an acid quirk could be limiting, at least in the whole heroing sense, but for you, you make it work." Rumi explains. It honestly Rumi of herself when she first started as a hero and the skepticism surrounding her quirk when she first described it as her basically having the same abilities as a rabbit.

"R-Really?" Mina smiles, face slightly glowing red from the praise given to her by her mentor, let alone one of the most powerful heroes in the country.

"Eh, can't say that I'm all that surprised about that, though. There's a reason why I felt you'd be a perfect fit for my hero agency." Miruko says, shrugging her shoulders.

"Are you sure there aren't any OTHER reasons?" Mina chirps, flashing a cheeky smile toward Rumi, making her chuckle under her breath while rolling her eyes.

"Don't push it." Miruko says, feeling slightly weird for the bunny-themed hero that she would have to be the mature one this time around, at least somewhat. "You might be good, but you still got a ways to go until your top ten worthy." Rumi goes on to scold softly, making Mina groan.

"So," Miruko starts, grabbing Mina's attention before asking, "Ready for some training?" Causing Mina's eyes to light up with excitement and a wide, toothy grin to grow across her face.

"I'm up for anything." Mina smiled, confident in her ability to take whatever Rumi threw at her, the kind of mood that the bunny-themed hero was looking for.

"Alright, then," Miruko says, placing a hand on Mina's shoulder and pushing her down to her knees in front of her. "Consider this a lesson on endurance." Miruko asks as Mina looks between her legs, already seeing her member hard and ready to go through her hero outfit, causing her heart to thrum hard in her chest. "You might have the skills, but none of that will matter if you can't keep it up." Miruko explains, her hand finally slipping down to fish her cock out from the confines from the confines of her costume. "So let's get started with some breathing exercises." Rumi explains, placing a hand on Mina's head, not pulling or moving it, but leaving it there for the simple way of giving her sidekick the message of what she wanted her to do.

This a message that Mina quickly understood as she opened her mouth and took the head of Miruko's cock into her mouth, sucking and slurping on it and tasting the remnants of cum and spit, making her wonder who it was, but for the time being, she didn't mind in any case. It even went so far as to embolden her to go even further.

"Heh, not bad." Miruko chuckles, enjoying herself with Mina's initial efforts. "I'm guessing this isn't the first time you've done this?" Rumi asks, sounding almost like a joke if only a little bit actually curious.

"Mmmhmm." Mina gurgles, unable to answer for obvious reasons, but still confirms that Miruko isn't entirely wrong. Mina was a party girl and was more than happy to have more intimate experiences with people. Although a part of her doubted she had anyone as big as this before. Someone so virile and ready to fuck in all the right ways that led her to slurp loudly, trying her hardest to show how far she was willing to go for her, who, in return, continued to almost seem to be impressed with her efforts.

But she knew what she was doing was only the surface of how far she was able to take things. And so, with a quick breath, Mina goes for it and takes the rest of Miruko's cock into her mouth, allowing it to slip down her throat, all the while her nose bumps up against the bunny-themed hero's waist.

"Fuck, not half bad." Miruko remarks with a chuckle, causing the pink heroine to feel a shot of pride shoot through her body as she pulls her head back, taking in another quick breath of air through her nose before returning her head back down. Quickly deciding to bob her head up and down Miruko's cock, showing off her own spunk and eagerness up against Rumi's, pleasuring the bunny-themed hero's cock with almost endless devotion. 

Reaching out, Mina then went so far as to even grab Miruko by her thick-toned rear, opting to go for a better angle at things as she began to almost throat fuck herself across Rumi's cock. And throughout it all, the pink heroine didn't gag once, even as she plunged the hero's cock down her throat at an increasingly faster and faster pace. At the same time, she maintained complete and total eye contact with the hero above her, her gaze lustful and eager to please the hero standing above her. 

Biting her lower lip, Miruko felt like she was on cloud nine as she felt Mina's throat wrapped around her thick cock, showing a level of experience that Rumi had a feeling the pink heroine would have, not that she minded in the least. The first sidekick she takes on, and she's this good at cock sucking, which only told Miruko that things were going to be perfect from here. And to just think that her hero agency was going to be filled to the brim with the best of the best female heroes out there.

"Pretty good for a trainee." Miruko praises her sidekick, still keeping things coy before saying, "But," Perking up Mina's attention in return. "But something tells me you can take a little bit more." Rumi added, causing the pink heroine to smirk up at her as the bunny-themed hero reached out, grabbing hold of Mina's horns, a sensation that caused a shiver to rack up her spine. Even though it was kinda embarrassing to admit out loud, the pink heroine knew her horns were sensitive. Not to a painful degree, but more or less to a point where she struggled to focus on anything besides what was ever making contact with her horns. However, despite all of that, with some of her best efforts, Mina kept trying to give Miruko what she would ever get.

"Make sure you get a good breath in." Miruko says, readying herself. "Cause your gonna need it." Rumi finally finishes before using the grip she had on Mina's horns to suddenly pull her head forward, slamming her cock roughly down Mina's throat, allowing her thick, cum filled balls to slap her chin underneath before she begins to rapidly and harshly fuck her face. Showing no mercy whatsoever to the younger woman beneath her as she brutalized her wet, warm, and tight maw that stretched and compressed around her massive member.

"GLKGLKG! GLKGLK! GLKGLK! GLKGLK! GLKGKLLK!" Mina slurred wetly out from her mouth, gagging and retching, yet not as much as people usually do whenever Miruko fucked their throat, impressing the number 5 hero of Japan even further than ever before as she humped Mina's features, her tight and toned thighs flexing with exertion as she even goes so far as to hunch over Mina's head, making sure the only thing that happened was that Mina took her cock as much as she possibly could as she fucked her face.

For Mina herself, however, it was a perfect experience. Sure, the lack of air going into her lungs made things not exactly the easiest to go through, but that she could handle. She still knew to take in those short breaths of air whenever Miruko dislodged her cock out from her throat for that brief second before thrusting it back down. But throughout it all, she was turned on to no end, her body alight with pleasure flowing through every facet of her even as her eyes grew watery and red from the lack of oxygen she was forced to go through. It was almost euphoric in a sense, getting face fucked in such a way by one of her hero idols, so much so that she couldn't even stop herself from reaching down a hand to begin touching herself, something that Rumi quickly noticed.

"Not yet, Rookie. Keep those hands by your sides." Miruko commands, still not wasting a single beat in fucking Mina's face as Mina herself does exactly what Rumi wants, keeping her hands back down her sides and denying herself the ability to pleasure herself in what was going on. Even though it was slightly frustrating not being able to satiate that lust that plumed and grew throughout her body, but she knew deep down that this was still a learning experience, not just a chance to just get freaky with Rumi. 

"With her horns, it was almost like she was meant for this." Miruko thinks to herself, continuing to pound at Mina's face with her hips, pulling out thick waves of throat goo and flem out from her mouth that splattered down across Mina's breasts and her erect nipples, stimulating her even further as she gargled and gagged across Rumi's cock. Completely and totally helpless to the heroine, turning Mina on even further at that sheer thought alone.

Then, without even cumming first, Miruko tears her cock out from Mina's mouth, letting her gasp and take in easier breaths of air into her lungs while Rumi stroked herself off, continuing to keep herself hard. "Don't think you're going to get your prize that easily. This is still training; after all, you gotta work for it." Miruko explains, with Mina understanding perfectly, although that didn't stop her from feeling slightly disappointed about not getting her hot gooey prize.

"Aw, really?" Mina whines, giving her mentor a cheeky smile, who rolls her eyes back down at her before slapping her across the face with her cock before the pink heroine opens her mouth in return and allows Rumi to beat her massive member across her tongue, spurting out a few oozes of pre across it, giving her a nice substitute to what she wanted, at least, for the time being.

"Patience, rookie, you'll get what you want, and then some, just trust me." Miruko explains, amusing her sidekick. "Alright, turn around and bend over." Rumi then commands, something that Mina quickly follows, turning herself around and presenting her plush rear to the bunny-themed hero behind her, nearly making Miruko burst right then and there at the sight of her tightly packed, spandex costumed rear. Oh, yeah, this was going to be fun.

"Oh! Wait, hold on." Mina perks up, reaching back a hand toward her rear, confusing Miruko before she quickly understands what she is doing. The pink heroine then uses her quirk to disintegrate her costume covering her crotch, causing Rumi's cock to strain harder than ever before. "Alright, now you can go."

"Not gonna find it kinda hard to explain when you have to bring it in for repairs?" Miruko comments, giving the pink heroine a momentary pause.

"I'll just say I REALLY had to go to the bathroom." Mina responds, obviously coming up with the excuse on the spot, nearly making Miruko laugh before she lines her cock up with the entrance to the pink heroine's pussy. "Ah, really? Back there, again? Kinda predictable, to be honest." Mina chirps, causing Miruko to grit her teeth slightly at her brattish behavior before she suddenly seizes her via a handful of her fluffy pink hair. 

"In that case," Miruko starts shifting her cock to align up with Mina's asshole. "Let's see how you do here." Rumi says before suddenly thrusting her cock forward into Mina's rear, causing the pink heroine to let out a sound that sounded like the air being knocked out of her lungs, instantly causing Miruko to retract. "Oh, shit. You ok?" Rumi asks, wanting to make sure that she didn't actually end up hurting her new sidekick.

"No, no, it's fine. Let me just...." Mina says before once again reaching a hand back toward her rear, this time, however, inserting a finger into her own anus, filling it with the less acidic version she tended to use whenever she was getting intimate with someone. "Alright! All ready to go!" Mina assures her, only deepening the admiration Miruko had for at that point as she goes back to push her cock back into her asshole, this time finding it much easier to enter while still being tight.

"Damn, you even come with your own lube." Miruko groans slightly, getting a feel for Mina's asshole as she eases her hips down further and further, enjoying how the heroine in training's rear twitched and squirmed around her cock. 

"Oooooooohhhhhhh.... W-Well, you k-know certain quirks have their uses."  Mina moans, her eyes nearly rolling into the back of her head as she's practically stuffed full with cock to her absolute limits, causing her toes to curl and her knuckles to tighten immensely.

Mina was no stranger to anal. At the very least, she was acquainted with it. A part of her even remembered back during her first time trying it; like for others, it was a bit of an awkward experience, but after using her quirk in such a way for the first time, it was a much easier experience to go through. But even then, she never took a member as massive as Miruko's, feeling it press further and further inside her until the number 5 hero of Japan's toned and muscled hips finally met her's, causing one last moan to escape out past her lips as she nearly feels an orgasm throw itself out of her right then and there. But after slowly calming herself back down, she glances back behind herself up toward Miruko, who, from her perspective, seemed to be enjoying herself just as much as Mina was. "Mmmmmm, how is it?" Mina asks, biting her bottom lip to stifle any moans that might've crawled out past her lips.

"Perfect." Miruko simply responds, her body filling with a type of lust that only made her breed the absolute fuck out of Mina's ass. Still, for the time being, at least, she holds herself back, keeping those more carnal senses under check, even as they begged louder and louder to be let out. However, feeling such a tight ass wrapped around her cock like a vice made doing just that quite the difficult task for the bunny-themed hero.

She knew she could go from right then and there and just get started, bombarding her hips back and forth and reaming Mina's ass. But she wanted to enjoy herself, and more importantly, this was still to help train someone like Mina just as much as it was for her to get off. And so, rather than starting to pound Mina's ass, Miruko began to slowly pull her hips back, dragging another moan out from Mina the same way that she was pulling her cock out from her rear, taking all the time that she needed until only the head of her cock remained stuffed deep inside her sidekick. 

"Fuck, you ready for this?" Miruko asks, wanting to make sure Mina is all for what is about to happen.

"Yes!" Mina practically shouts. "Fuck me!" 

In that case, who was Miruko to deny what her sidekick wanted. And so, using her powerful enhanced strength, Rumi began to sink her hips back down, going down the same route she went in when she first delved into the deepest parts of Mina's ass, although, this time however, moving slightly faster, not by much, but giving the pink heroine more than enough time to get used to what would be coming her way, repeatedly.

Then, as their hips met again, Miruko retracted back, pulling back again, but also like how she initially entered, this time also a little faster before, once again, the head of her thick and massive cock remained inside Mina until she then sinks her hips back forward, again going more quickly before repeating the process again and again, working herself up to a faster and enhanced speed by the second, pushing Mina to her absolute limits as she was filled by such a big cock.

Before long, Miruko built herself up to a fast enough pace that she began to pound at Mina's rear, causing her thick pink cheeks to ripple and shake with every thrust.

Even though the pink heroine was forced to use a fair amount of lube, her ass still felt as tight as ever to the bunny-themed hero as she stretched it to fit around her cock, molding it perfectly to the shape of her member. Each feeling of pleasure she got in return only motivated her to go even harder and faster by the second until she was going at her usual speed, leaving Mina a moaning mess beneath her.

"OOOOOOHHHHHHHH FFUUUUUUUUUCK!" Mina screamed, her moans filling up the gym area as Miruko continued to go at her, satisfied that she was able to really pound that brattish behavior out of her. Breaking her down bit by bit, pulling rough, turbulent orgasms out of her, and completely frying her brain in the process until she was just an overwhelmed, stimulated mess of nerves and pleasure.

"How you doin' rookie! Still think you can keep up?" Miruko asks, only earning herself another long, drawn-out moan from her sidekick in response, emboldening her to go even faster until her hips practically became a blur as she went at fucking Mina's ass with an endless passion. 

Even though the pink heroine herself was cumming or in the process of having an orgasm every other second, Miruko still stabilized herself, not cumming herself just yet, even as Mina's ass continued to practically milk her cock, trying its hardest to coax the hot sticky liquid that lied within her cum filled and cum churning testicles as the clapped over Mina's pussy as it spray out another orgasm. 

Eventually, though, Miruko begins to slow down, her rough pounding easing up as Mina's body goes almost limp from the brain-frying pleasure, something that was still elicited even as Rumi began to slowly retract her cock out from her ass, taking things nice and slow to get another moan and or groan out from the pink heroine until she finally fully pulls herself out, leaving Mina's rear to gape slightly, allowing a cool breeze to waft against it and make the pink heroine shiver.

"H-Holy s-shit...." Mina moans, amusing Miruko with her reaction while her tongue lulls out of her mouth as she pants, face almost red from the exertion her body just endured. Her legs practically felt numb, only shaking from something that felt like the most exhausting workout Mina had ever put her body through.

Stepping back from her work, Miruko went over some things in her head. It was clear that Mina had potential, from her quirk all the way to her fuck factor. But she still needed training if Rumi was going to turn her into the type of heroine she imagined her to be. Not that either of them minded. Training through fucking, for people like Miruko and Mina, it sounded like the match both of them were hoping for their entire lives.

So, after seeing Mina slowly come back, Miruko approaches her, hard cock in hand. "So, Rookie, ready to go again?"

----

"Ow. Ow. Ow. Ow. Ow." Mina groans as she walks up the stairs to her dorm room. Of all days for the elevator to stop working, it had to be the one where the pink heroine felt like her entire body was destroyed from the head down. And yet, despite it all, she would still consider it a good day, a rough one, but a good day nonetheless as she finally came to her floor.

However, just as she turns a corner to walk down the hallway to her room, she bumps into someone. 

"Oh! Mina." Jirou jumps, startled by the sight of her exhausted-looking friend. Usually, even after the hardest training sessions, Mina still had some energy left inside herself. The pink heroine even went so far as to joke that she always kept some in reserve just in case. But now, looking at her, the pink heroine seemed to lack any and all vitality.

"H-Hey! J-Jirou...." Mina smiles, feeling almost out of breath even after only walking up some stairs. Though she didn't feel like it due to her lack of energy, the pink heroine still kept a smile on her face as she turned to look at her friend, noticing the slightly concerned look on her face.

"Um, are you ok?" Kyoka asks, extending out a hand and placing it on Mina's shoulder to stabilize her since the pink heroine seemed like she could fall over at any second at that point.

"I-I'm fine, j-just a little tired, is all." Mina explains with a huff before turning to see that her explanation didn't do much to deter the look of concern on her friend's face. "Whelp, better get going then...." Mina chuckles awkwardly before turning and walking past her, hoping to just hop into the shower at that point and clean herself up so that none of her other friends see her in her current state. 

But as she walks, she feels something slip out of her hand and clatter to the floor beneath her. Her phone. "Oh, come on." Mina sighed annoyedly as she almost painfully reached down to pick it up, giving Jirou the perfect chance behind her to see up her skirt and notice the small line of arousal oozing down the inner side of her leg, causing Jirou's face to flush a hot shade of red at the sight. 

However, Kyoka quickly turns her gaze to the side once Mina turns back around to wave to her before finally walking off to her room, leaving Jirou by herself as a huff slowly leaves her lips as she raises a hand up to face palm herself.

She couldn't just let this stand. One of her friends was having sex with a pro hero. Nothing good would end up coming about this. Even though the plan she had at that point was more less rough, she knew she had to go forward with it, not for her own sake, but only for Mina's own. Although, deep down within herself, she couldn't help but feel slightly jealous.

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Howdy Doody!~ Another chapter down for the count! Can't tell you how good it feels to finally finish one of these things and get it out for ya'll to enjoy!~ Just so you know, however, peeps on Patreon had access to this story for about a few weeks, so if you want to be in the know beforehand and even get access to the already finished next chapter, check out my Patreon!~