[Froppy Semi-Twinning, Tongue Fuck (All the way through)]

"Deku, do you know where Tsuyu-chan's been?"

A question left the brunette's mouth as she walked down one of the hallways within the UA dorm, side by side with one of her closest friends. A boy that immediately flushed red as the query graced his ears, prompting the peppy girl to tilt her head slightly in response. "Deku, have yo-"

"N-No! No, that's not it at all, it's just..." The green-haired boy looked back and forth before he swallowed audibly. "You know how mutation-based quirks work around this time of the month, right, Uraraka?" He continued, his entire face completely red like a juicy tomato.

The girl, Uraraka, tilted her head slightly as she started thinking. "Well, if they're anything like animals, they start going into heat around this time of the month... Are you saying that's why she's not been in class?" The seemingly naive girl replied, receiving a nod in response. "Well if that's the issue, why don't we just go to her room and check up on her, maybe help her deal with all of that warmth that's causing her issues?"

Before Deku had the chance to cut her off and explain the issue further, the gravity-controlling girl took off with a skip in her step. "Because she could be li... Oh, Ochako..." He muttered a little as his face continued to grow redder before he took off in the opposite direction. Normally, he'd help a friend, but he didn't want to get caught in the sight of another heroine in heat. Not after his internship went wrong.

"Let's see..." Ochako hummed to herself as she checked the numbers on each door, walking down the halls until she got to the room she was trying to find. The room that her friend Asui Tsuyu should currently be staying in, which meant that she should be in there at this very moment if the heat theory was correct...

The brunette paused as she briefly retraced her steps, having completely passed over the room she was looking for. Something she only noticed as she heard a startlingly loud sound of pleasure coming from the room. "This... might be it?" The girl didn't feel entirely certain, as the sound could've come from a pair of lovers that were just being a little too loud today, but the only way to find out would be to go inside and check.

She took a deep breath before turning the door handle, only to be surprised by the way it hadn't been locked. "Okay, if she really is in heat, then she wouldn't have thought about locking this." She continued to affirm her suspicions as she peered into the dorm room, only for a sliver of light from the hallway to slip on inside, barely illuminating any of it.

Unfortunately, this tiny ray of light didn't do much. It only ended up revealing a small bit of the room, which didn't even show anybody inside. "Hello? Tsuyu? Are you in here?" Uraraka asked as she stepped inside, about to put her hand onto the light switch as she closed the door behind her...

Only for a tongue to suddenly shoot out towards her hand, depriving her of the chance to turn on the lights as the door fully shut behind her. Before the brunette knew what was happening, she found herself being tossed onto the bed rather roughly. Upon opening her eyes to see who or what might be assaulting her, she saw the red-faced frog that she had been looking for... and at that very same time, she could feel the warm breath leaving her slippery lips, bringing a warm blush to her cheeks as well...

"T-Tsuyu? What's the matter? Are you..." Ochako asked, only for a little bit of drool to hit her cheek. This wasn't how Tsuyu acted at all. Normally, the froggy girl was eloquently dry and peppy whenever the situation needed it, but this... this was wild lust. She could tell that much, especially as the drool continued to dribble down her face...

The moss-green-haired girl kept breathing deliberately in a drawn-out manner as she looked down on her friend, her eyes lacking a little bit of color to show just how hard she had been losing herself to her heat. Exactly the thing that Deku would've warned her about, if she had just waited and listened to him  But the peppy girl just had to rush ahead, and now she found herself at the mercy of a girl who wanted nothing more than to satisfy the heat in her loins.

A heat that she quickly found a way to satiate by forcing her tongue, the ever-slippery, and grossly long muscle, straight into her friend's mouth. It had previously been wrapped around her hand, so she got a little taste of her own skin in the process, but most of what she could taste was nothing more than excessive saliva. Enough to fill out her cheeks and make it hard to breathe, even without considering the slippery snake-like 'limb' inside of her mouth.

"T-Thuyu!" Uraraka tried to call out, but her words were muffled as she was forcefully kissed by the girl laying atop of her. It was more than a little gross, but at the same time, the more that long and coiling tongue stayed within her mouth, the more her own cheeks started to grow redder and redder. Partly because of the warmth being poured into her, and partly because the situation at hand was more than a little erotic and equally intimate. Normally, if the froggy girl had asked, she wouldn't have minded a kiss, at least a quick one, but this...

This made her thighs squish together, as they slowly grew wet from the puddle of juice developing underneath her, the liquid that was quickly seeping into the mattress underneath, joining all the other squirts that Tsuyu had let out in her lonesome. Ochako couldn't possibly fathom just how long the girl had stayed in here, trying to overcome her heat without trying to go on the prowl and satisfy herself using anybody else. If not for her arrival, she would've likely gone mad from the lack of relief...

Not that either of them could express their relief at this development. One of them was currently in a heat-driven frenzy, and the other was the target of her sloppy makeout. So sloppy in fact that the tongue kept pushing in and out of her mouth, causing more of her spit and saliva to go flying all over, drenching their suits and the bedcovers below. But that was just the beginning, a simple extreme makeout wasn't nearly enough...

It took but a moment more for the brunette's eyes to widen as she felt the elongated muscle go deeper, yet deeper. She could feel it brushing up against the back of her throat, then the walls of her stomach, before it continued to stretch and reach further within her until she felt it trying to force its way through her innards. It was enough to make her gag reflex activate, but it wouldn't stop the frog, not as she continued to delve further.

There was a determined but horny look in the frog's eyes, as she just forced it to go further and further. She needed her sense of relief, and the only way to get it, in her mind, was to try and stimulate one of her most sensitive muscles, that being her tongue. The deeper it went, the more her friend's body started to press down on it, which sent a shock all the way through the slippery limb, causing her eyes to roll back into her head every few seconds. Nothing that would end up stopping her prematurely, as she managed to get her tongue all the way through until it reached the colon, and then...

Both girls released a mutual cry, both being muffled by their current situation as Uraraka felt her ass spreading outward to allow for the tongue of her friend to squeeze out of the hole, her suit distending downward in turn as the tongue continued to poke around, trying to find a further way to go. The frog's eyebrows furrowed as her tongue poked around, some little sense of self returning to her as she couldn't find anything...

Right up until she could feel something nearly as wet and as slippery as her tongue, the perfect place for her tongue to go... the brunette's untouched pussy!

Ochako barely had the chance to realize what was about to happen before her eyes rolled into the back of her head, the sheer pleasure of having her tight lower lips pried apart by the spear that was her friend's tongue was too much, to put it bluntly. She could feel the pleasure bubbling up within her as she trembled all over, her labored and muffled breathing intensifying until-

"HHHHAAAAAAAAAAAHHHHHH-"

A proper scream slipped out of Uraraka's mouth as she felt an orgasm quaking its way through her body, causing juice to squirt out of not only her precious lower hole but also her poor nipples as she tried to keep her mind intact. That much pleasure hitting her all at once was way too much for a young girl like her, as she slowly grew limp within her friend's arms. A friend that gradually pulled her tongue back out, slipping it all the way through her body before it snapped straight into her mouth where it belonged.

Unfortunately for Tsuyu, having gone that deep and having touched the possible core of her friend's body was not nearly enough to make her reach a decisive climax, prompting her to slowly drag herself away from the orgasming girl as she started poking away at her lower lips herself, using her tongue primarily. She hadn't quite tried to stick it in before, since she had been too busy just rubbing away at the hole, but now that she knew how it felt to have something squeeze down on her tongue, maybe...

While the frog continued to think to herself in her heated haze, the young gravity heroine was catching her breath, inhaling deeply as she tried to pull herself back to some level of levelheadedness... but all she could muster, was letting her tongue hang out, drool running down the long muscle as she felt the heat from before overwhelm her, despite that wonderfully powerful climax just moments ago...

Only as she focused her eyes for just a moment did she notice what was dangerously off. Namely, her tongue. It was... long. Way longer than it ever was. Not to mention, as she looked out of the corner of her eye, she could see the faint shade of mossy green. Was she...

Before Uraraka could try and figure out what had happened to her, she suddenly felt her tongue moving on its own accord. It shot out, further and further as it immediately slipped down her uniform, wrapping around her breasts and squeezing tightly as it continued to stretch all the way down to her pussy, a hole that was still pried open just a little. And still leaking more than enough juice.

She barely got a moment to let out a protesting gasp before she felt her elongated and thickened muscle penetrate into her lower lips, thrusting in and out with wild abandon as she fell onto her side. Having her body work against her, and get mutated as she somehow acquired the very same quirk as her froggy friend... it was a little astonishing and frankly unbelievable...

Gasps and pants left her mouth as she tried to shuffle around, feeling her body tremble all over, as the same heat that had turned Tsuyu into a complete lust-driven maniac started to overtake her. Before she could reach towards the door she had come in through, she suddenly found her vision blurring to the point where she couldn't see a thing. Not that she needed to, she had all this wonderful pleasure down below.

Schlicks and thrusts could be heard throughout the room as the two girls played with themselves mindlessly. Each of them thrusting into each other with their tongues as they tried to calm their bodies down, but each orgasm would just drive them wilder and wilder.

If anybody were to open the door and find them now, they'd probably assault them just like how Tsuyu had assaulted her friend... but for now, they were more than 'content' enough to just try to get off by themselves. Fruitlessly, but they were going to get through it, one way or another...

By the time the heat faded, they'd probably have a lot of questions for one another...