[Bimbofication]

Souryuu narrowed her eyes as she looked out the window of the classroom. The navy base had gone through a few renovations over the last week or so, resulting in a rather high-school like aesthetic for not only many of the facilities, but also many of the girls in the fleet. Herself included, given the hall monitor attire that she wore. Her lupine ears twitched slightly as she sighed. She wasn't against the base going through a bit of fun like this, but she was absolutely against the way some of her fellow navy vessels were behaving.

Especially her sister Hiryuu. She was always a feisty one, but ever since the change in aesthetics she had turned from feisty into overall troublesome. Where a proud warrior once stood was a delinquent with an appetite for disaster... Something that she definitely needed to deal with before it was anywhere near too late.

That's when it hit the bespectacled blue-haired girl. If she couldn't stop her sister from getting rougher... then perhaps she should just drag the roughness out to its natural conclusion? It was a safe bet that might just result in the two of them not only rekindling their sisterly relationship on an equal level, but it could even solve the overall headache she was giving her. 

---

"So, let me just get this straight sis." Hiryuu said as she looked at the dumbbells that the bespectacled girl held in her hands, eyebrow currently raised in a skeptic manner. "You just want to watch me work out? Where'd the sudden change of heart come from? Usually you'd be trying to chase me away and make sure I don't hurt anybody with that badass bat of mine." Her words slowly grew more confident as the worry on her face faded away, perhaps a bit too overconfident as she'd soon see.

"The Admiral's going to be busy with the Ironblood girls since they're wanting him to try directly teaching them, which leaves me with a few free hours to just... well, spend time with the sister I've slowly lost time with." Souryuu replied as she pushed her glasses up with her pointer finger, before handing the training equipment over to her sibling. "Just use these. I want to see how many repetitions you can get through. Unless you think you'll tire out too early?"

Hiryuu spat at the ground before she dramatically tossed her seifuku off her, leaving her in a rather traditional looking set of underwear. A chest binding that pressed her bust up against her torso, as well as a loincloth that just barely covered up the lips down below. "You're probably gonna try something, I can just feel it..." The white-haired girl acknowledged before she took the two dumbbells, each labelled with a heavy '30kg' on each end. After all, they weren't humans, so such heavy weights were nothing to them. 

"But I'm ready for your worst. Come on, keep a good look at your younger sister as shows you just how strong she really is, and how much she can really take!" The near-naked carrier seemed far too confident at this point as she started pumping both pieces of iron, not even breaking a sweat before she got done with two dozens worth. The rhythm was just too solid to beat. Once one arm went down, the other went up, and so on.

Souryuu of course could only sit back and watch with a gleeful grin. The intent was not to just admire her sister's body, although it was quite the specimen and she could hardly pass such a golden opportunity. No, the intent was to watch the effects of the dumbbells work their magic on the brutish sister. She made a mental note to go pay Akashi a couple of extra jewels for even managing to find these things, especially as she watched the younger girl's physique slowly start to grow in all the right ways.

"Ehehe... T-Told you I'm the best, Sis. Just look at me, I'm all buff n' stuff!" Hiryuu practically shouted as she pumped her arms up and down a little more, the number on the ends of the dumbbells increasing as her speech gradually stupefied. On top of that, her clearly defined muscle was growing just that little bit more visible due to the sweat running down the ridges.

The muscle wasn't the only thing increasing either, as those tits that were being kept pinned down by her wrappings grew a little tight behind the white 'underwear'. If she kept on pumping her smarts into her body like she had been doing without being aware of it, she'd certainly make those binds burst and let her mounds loose at just the right time...

The glazed and almost brainless look in Hiryuu's eyes was causing Souryuu to start gasping and panting. She knew that the little magic dumbbells would roughen her personality and behavior up in a positive fashion that would leave her at no threat to anybody, but this was a bit ridiculous. She was turning her sister into a brainless brawny bimbo in just a few minutes. The blue-haired girl could just go ahead and tell her the truth and stop this descent, but the second head hidden between her thighs had other plans.

"Mmmmhm, Hiryuu... Say, can't you do a few squats to go with your lifting? I'm sure that'll really work your body to the bone." The warm-cheeked sister gave her gym bunny of a sister a suggestion, which caused the latter to nod and giggle in agreement, prompting her to squat on down...

"Look, Sis! I can get my legs aaaaaalllll the way down here without falling on my ass! Isn't it great? I feel so strong too, these thingies've been suuuuuper helpful!" Hiryuu remarked as her ass was practically rubbing up against her heels, her legs spread so far apart that her sister could easily catch a glimpse of her well-trimmed cunt despite the wide cloth that served as the only thing truly covering it up. Even as she lifted herself up and down in time with her arms pumping up and down, she managed to show off that tender crotch of hers to her horn dog of a sister, not even noticing the massive tent pitched against the latter's skirt.

Souryuu was well and truly aroused. So much so that she needed Hiryuu to finish melting her mind into muscles any minute now so she could just use her like the meat-puppet that she was turning into... which prompted another idea to pop into her head. As she noticed the number on the end of the dumbbells cap out at a nice '100kg', she started speaking up again. "Okay, Hiryuu. How about you let the dumbbells go and give me a nice flex? Show off just how strong you are!" Her words sounded so encouraging that it was not hard for the dumb dame in front of her to just ignore the wildly erect willie hidden beneath the fabric of her skirt... at least for a few moments more.

The white-haired bunny-carrier tilted her head a little as she tossed the weights aside, both of them caving into the ground and cracking the floor below as she started to stretch out her arms, showing off the wonderful layer of muscle those arms had gotten. Her belly was covered in an equally desirable six pack, and her thighs looked like they could split at least three different fruits in two with one squeeze. "Mmnnn... Okie, Hiryuu flex for sis!" Her speech had gotten phenomenally dumb, yet not quite so backwards sounding that it was impossible to understand what exactly she was saying.

The larger girl took a brief second to get into position before she kneeled down on one leg, flexing her body straight towards her sister's pillar... and the second her muscles delightfully popped to signify their full and complete growth, so too did her brain, a silky pink liquid pouring out from down below as well as her ears. That wonderful way for her brain to break was capped off by the binds on her chest tearing apart, revealing her bombshell breasts having grown to an equally strong G Cup. "Ehehe... Hiryuu good, yah?" Her giggling could hardly be called intelligent, yet it was actually a little endearing as the musclebound idiot was not even close to aware of how badly she had been deceived. Not that her sister minded that at all, it just made everything that much easier.

The blue-haired beauty let one of her hands run through the big-breasted bimbo's hair, giggling a little softer in tune with her sister's. "Oh yes. Hiryuu's very good. Maybe Hiryuu can show her sister how good she is at something else?" Souryuu said, which just made her stupid sister tilt her head in confusion... before those loose-hanging ears of hers were quickly taken ahold of as support.

Hiryuu got about a second to comprehend what was going on before she was violently shoved straight onto that wonderful cock hidden in front of her. Souryuu didn't even bother removing the skirt, simply forcing her muscle headed meat hole of a sister's lips around the rod, quickly turning the skirt damp with moisture as the dull-eyed dolt slobbered on the shaft. Strong she was, yes, but she was hardly more than a living onahole when it came to sex... at least, without a little bit of encouragement.

"You know, you'll be able to train your mouth-muscles if you start pumping up and down like this, Hiryuu. Don't you want to be known as the one here at school with the best blow? I'm sure everyone'll be quite jealous of your strong mouth." The cock-carrying carrier chimed as her own ears twitched, her hands letting go of her white-haired sister as the words bounced around within her empty head... 

Moments later, it felt as if her cock was being stroked and sucked by an industrial strength pump. Souryuu's grin quickly grew as she took advantage of the fruits of her deceit, the lust-driven lass squatting down in front of her bobbing her head up and down, in an attempt to 'exercise' her mouth. It didn't matter that most of what she could taste was barely-wet cloth, she was too stupid to realize it. She just registered a need to train her lips and throat so it would be the strongest on campus, just like her superior sister told her!

The further that routine continued, the closer Souryuu started to edge towards a climax. She had to admit, her sister was pretty good at that new purpose of hers, so much so that if she lost as much as a little inch of control, the cum would just come pouring out of her nuts... and why shouldn't they, really? She was nothing more than a cum dump at this point, a super strong and delightfully dumb one, but a cum dump regardless.

With that in mind, the elder sister once more grabbed ahold of the throating sibling's ears before tugging hard down on them, causing Hiryuu's eyes to roll into the back of her head as the cock within her throat went as deep as it could possibly go. The cum within Souryuu's nuts was free to flow out once she bottomed out inside of that mouth pussy, the pressure put upon her cock by the seed slipping out forcing the rod out of that wonderful hole. The rest of the stringy pieces of cum landed atop of the white-haired whore's head, almost blending into the rest of her disheveled hair and leaving her looking even more like a musclebound cum dump than she already did...

With the cum dribbling out of her sister's mouth and the extra seed slipping down the side of her head, something started sparking within Souryuu. Something that she could understand more than she'd like to admit... or she would've liked to admit just an hour ago. Her eyes darted down towards the discarded dumbbells on the floor, then towards the window leading out to the 'schoolyard'. Her stupid sister wasn't the only delinquent amongst the navy vessels, so perhaps it was about time that she taught the rest how to act like proper meatheads.

Her cock tensed up at the thought, already rising to full mast as the blue-haired carrier's glasses gleamed forebodingly. She was going to have quite the busy afternoon.