Fusion Flareup (OC Fusion/Corruption TF)

Strong NSFW warning: contains futanari and explicit lewds. 

A Magical Girl goes to check if her teammate is alright, and sees her being abused by a senior. When she tries to stop it though, things don't go to plan. 

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Shinobu felt her heart beating a mile a minute as she snuck into the gym. Normally, she wouldn’t have to be sneaky about it. It wasn’t like she wasn’t allowed there. But the last time she’d been to the gym, she’d witnessed something she wasn’t supposed to, so she was worried…

Her friend Mai had entered the gym, which wasn’t too unusual - she did try to keep in shape, considering her obligations as a Magical Girl and idol both. Shinobu herself could probably use some more exercise, seeing as she wasn’t the most active of girls outside of walking between college classes. But Shinobu wasn’t there to exercise, because after Mai had entered, she’d seen another girl enter - another Magical Girl, their senior and probably one of the stronger ones around, called Flare.

Strictly speaking, they were all on the same side, fighting the demons with magic and friendship. That was how Magical Girls worked after all. But Shinobu didn’t like Flare; the girl had an ego the size of Everest, and seemed to only care about anyone insofar as she could use them. And besides which, Mai had recently revealed that she’d been roped into being Flare’s latest chew toy! When Shinobu had walked in on them that one time, she’d thought they were going out, but the truth was that Flare was abusing Mai’s kind nature.

Thus, despite her preference to avoid confrontations in general if at all possible, Shinobu decided she had to protect her friend. She followed them in, and snuck along to try and see if Flare was up to her old tricks. They’d talked to Mai to try and get her to fight back against Flare, but she just wasn’t sure that she’d be able to do it if she was backed against a wall.

Shinobu didn’t hear much out of the ordinary at first - the sound of some exercise equipment moving, grunts of effort. She sighed in relief - were they avoiding each other? But her relief was short-lived. There were murmuring voices up ahead, just too distant for her to make out - and then there was moaning and cries from the gym ahead.

The magical girl flushed with embarrassment - she should go get help, shouldn’t she? But… she had to help Mai before it went any further! She turned the corner, preparing to get into a fight.

Mai was pressed against a wall, Flare standing over her. One of Flare’s hands was barring Mai’s escape, while the other was down below flicking her crotch. “I’ve hardly touched you,” she said with a hyena laugh, “And you’re already moaning like a slut! You can deny it all you like, but you’re my bitch through and through!”

The newer magical girl squirmed, rubbing her legs together - although from where Shinobu was standing, she wasn’t sure if she was trying to stop the molestation or rub herself off. “N-No, I’m not…” she stammered, but her tone of voice certainly wasn’t convincing.

“That idol deal done yet? When I’m done with you here, maybe we can go talk with some friends of mine, teach you how magical girl idols keep making money when their contract is through. A slut like you is definitely going to enjoy that.”

Shinobu didn’t think it was possible to blush more, but she found a way. She couldn’t let her keep doing this! Even if Flare was stronger than her, surely she would back off once confronted with her wrongdoing. Bullies were usually the sort to be weak-willed like that right? She took her glasses off and stowed them safely in a case in her pocket, and then willed her magic to come. With a small starburst of light, Shinobu transformed into her magical girl form - an outfit looking somewhere between pajamas and a dress, with a fluffy cloud orbiting her, as befit her dream-focused powerset.

Shinobu took a deep breath, and then another. She wasn’t planning to fight Flare, just get her to back off… she nodded to herself, and ran around the corner. “Leave her alo-”

The Magical Girl of Dreams was interrupted by the fact she ran face first into a chest. She bounced off the armored (and quite large, actually) chest and stumbled back, blinking from the physical and mental shock as Flare loomed over her. “And what’ve we got here? A Peeping Tom? ...Or maybe Tammy, I dunno. How shameful of you~”

“I wasn’t peeping!” Shinobu said, trying not to stutter and not really succeeding. “I came to help my friend!”

“What, my bitch over there? She’s doing great.” Flare smiled viciously. “The only help she needs is mine, getting her off since I’ve ruined other girls for her!”

“You’re a bully is what you are!” Shinobu snapped. “You keep jerking her around, and I heard you saying you were going to get her into porn…”

“I didn’t say a thing about porn.” Flare said smugly. “What a pervert you are! How long were you listening, with that dirty little mind of yours?”

“L-Long enough to know you’re no good!” Shinobu said.

“S-Shinobu, it’s fine, don’t worry about me-” Mai stammered.

“No, Mai, it’s fine. Clearly, she has something she wants to say.” Flare said. Mai shut up, unable to make herself disobey. “I think I know what this is about. You’re jealous, aren’t ya?”

Shinobu blinked in disbelief. “Jealous?” she said blankly.

“Jealous. Maybe you’re jealous of me, and want that cutie all to yourself~” Flare said. She stepped forward, and Shinobu stepped back; the process repeated again and again until Shinobu was backed against a wall. “Or maybe you’re jealous of my personal onahole over there. You want a piece of this all for yourself?” As she spoke, she pressed something against Shinobu’s crotch. Flare was a magical girl, and that meant she’d encountered quite a few demons inflicting any number of changes - some of them could stick around, and Shinobu had definitely seen this one when she’d walked in on Flare and Mai last…

“I-I-I’m not jealous of anything!” Shinobu stammered, “You just need to leave Mai alone!” She sent her cloud at Flare, trying to will her to sleep as the magic enveloped her head.

Flare blinked a few times. Then snorted and waved the cloud away like an annoying fly, hardly noticing it’s presence. “Ha! Getting better at that little trick, are ya? Not good enough to work on me though!” she thrust an arm forward, slamming it against the wall and blocking Shinobu’s escape like she had with Mai. “Cute. I’ve decided you’re going to be my bitch too. Lucky you, I’ve got room for more!” Her free hand pulled down her skirt, letting the length beneath spring free. “Get sucking, and maybe I’ll forgive your interruption.”

Shinobu went pale. She should have gone to get help after all. She didn’t know what to do - all she could do was throw a magic attack at Flare and hope it stunned her. Her magic cloud turned dark and angry, before a lightning bolt shot out of it at Flare. The older woman staggered for just a moment from the hit, and Shinobu ducked under her arm and ran for it.

Or she tried to. A hand clamped around her arm with an iron grip. “Good try! But it looks like somebody needs an attitude adjustment.” she said. “I saw some of you girls trying this trick in the tournament. Why don’t I give it a whirl?”

Shinobu didn’t know what she was talking about at first, but then she felt a pressure on her mind, on her very soul. An overwhelming pressure that pulled her into Flare, sapped the will to run. She knew what it was - fusion was not something magical girls were technically supposed to know about, but her group had had to use it in a few desperate situations… or been forced into it by demons. Shinobu knew what it felt like to be dragged into a fusion.

The gym filled with light, and Shinobu tried to break the connection. But Flare had her, both physically and spiritually; her individuality was beat into submission, and where a normal fuse would have become an even split between the two initiating wills, a partnership to make something new, this was different. Her soul was being taken, Shinobu was going away for a while. Flare was taking the parts she liked and making them her own, while discarding the parts she didn’t.

And it felt good. Shinobu was no longer a person, just material for Flare’s personal use, and she loved it. She couldn’t fight back or disobey because she no longer had a will to do it with, completely subsumed into Flare’s.

The light faded, and Mai blinked the spots from her eyes as she saw the new being. Like all fusions in magical girl form, she was tall, strong, in peak physical condition. She had Flare’s coloring, with long red hair tied back in an ass-length ponytail, and pretty features that mixed Shinobu’s gentleness and Flare’s roughness into a tantalysing visage. She wore an outfit that looked both easy to move in and good for a fight, yet comfortable enough to sleep in, somehow mixing armor and comfort.

She was also very much more Flare than Shinobu, Mai realized. The way she carried herself with swagger as she took in her new self, the feral grin playing across her features as she stroked her hands across her body. “Ha! This is great!” she said. “Who knew someone like Shinobu could be part of something so sexy?” she dropped a hand down to her crotch, the member already stiff.

Mai swallowed hard, trying not to be too aroused by the sight. She’d been conditioned by Flare to associate certain thoughts with the sight of an erect shaft, and it was hard fighting those off. Maybe since the fusion was distracted…

“Haaah… feels good…” The fusion groaned, dipping a finger into the womanhood that sat beneath her cock. Shinobu might have thought it was odd to have both, but Shinobu didn’t presently exist so who cared. Her other hand went to her tit, and started playing around with it. Part of her really wanted to rub one out right there!

Oh, it was such a nice thought. She was a pervy girl, wasn’t she? It wasn’t just Flare, who of course was a massive horndog; her other component had a bit of a lewd side to her, buried under that cute dork persona she put on. The fusion had taken the lewdest parts of both her creators and she loved it. “Hey, Mai?” she called.

Mai stiffened, a shiver running down her spine and something else running down her leg. “Y-Yes…?” she stammered. She’d called her Mai, not ‘bitch’ or ‘slut’, so maybe Shinobu was more in control than she seemed? “S-Shino-”

She turned around and got a mouthful of cock. She let out a startled cry, muffled by the dick shoving itself down her throat. When had she gotten so close - and she wasn’t that tall - and…

The fusion laughed as Mai instinctively knelt, dropping into prime cocksucking position as her mouth worked over the air in front of her. The warm red cloud around her head was doing it’s work, putting her in a wet dream that let the fusion get real close. “Let’s go with ‘Shinoflare’? Hate to let the nerd get top billing, but ‘Flarenobu’ doesn’t have the same ring.” The fusion said.

She let Mai have her dream while she got herself off. There was a pulse and jerk as a splatter of cum landed on Mai’s face. Mai blinked, the dream fading as the very real semen landed in her mouth. Her vagina grew wetter at the taste - it had that odd sweetness to it that Flare already had, amplified somehow. That overpowering taste… she didn’t even realize she’d started licking some up…

“God, you really are a slut. You watch Flare dominate your friend, hell, you watch your friend get her sense of self shattered to pieces, and you get off on it!” Shinoflare said. Mai had a hard time responding, focused as she was on the cock hanging in front of her. “I bet you just wish Flare had dicked her down, huh? Or maybe you’re jealous - she made Shinobu belong to her even more than you do.”

“I-I didn’t… I’m not… oooh….” Mai groaned. She wanted to deny it, but she found she had a hard time of it. Even those words had been a struggle.

“Oh? If that’s the case, I guess I’ll just go find someone else to bend over.” Shinoflare said.

Mai blinked. That was… good, wasn’t it? They were done with her? But she found her hand reaching up instead. Reaching up and grabbing the still-stiff penis hanging in front of her face.

“Hmm… you were lying, weren’t you? Well, that’s a punishment…” Shinoflare gave her a toothy grin. “I think the best punishment for a whore like you would be to leave you here, wouldn’t it? You need to be fucked. So I won’t.”

Mai was going to agree. Good. She didn’t want it anyway. She wished she could say that, she really wished she could. Shinoflare turned away and started walking as Mai wrestled with herself. She had to go get some help and rescue Shinobu - ironic, considering she’d just failed to rescue Mai. She would just get up and leave and-

“P-Please…” Mai stammered.

“Please what?” Shinoflare prompted.

“Please… I need it… I need it so badly...”

The semen wasn’t just sweet. Mai had had more than one taste of Flare’s. But somehow, the fusion’s cum went from “weirdly tasty” to “addictive”. Mai had to have more of that cock. She needed it like she needed air. She hated that she did, but she absolutely could not go without it.

Shinoflare smirked. “Awww, and you were telling Flare earlier to leave Shinobu alone. Do you still want that? Do you want me to de-fuse?” she asked.

“O-Of course I want that… you should leave Shinobu alone…” Mai managed to say. It sounded weak to her own ears, wrong even. She certainly didn’t seem to be convincing the fusion.

“Oh? If you’re sure, I will. You just have to ask, and I’ll turn riiiight back.” Shinoflare said. Mai stared in open-mouthed disbelief. But Shinoflare wasn’t done. She waved her penis around in Mai’s face, watching her eyes follow it involuntarily. “But before you do, think about this. If I de-fuse, you can’t take this cock up your cunt~”

“T-That’s… fine… please…” Mai stammered. But she couldn’t finish the sentence. The words died in her throat, and drool started to trickle down the corner of her mouth as she was enraptured by the meat in front of her.

“Well? Finish the sentence.” Shinoflare said. “Tell me what you want.”

Mai heard the words dimly. She knew what she had to say. She knew what she should say. She also knew that she was physically and spiritually incapable of saying it. “Please… fuck me…”

Shinoflare put a hand on her head. A disconcertingly comforting hand, stroking her hair like a puppy that had just been good. “Oh, I want to. But you don’t want me. You want Shinobu, don’t you? I can hardly get between you two.” she said. “Unless I’m wrong?”

“I…”

“Go on. Tell me you don’t care about Shinobu. All you want is for Shinoflare to fuck you. You don’t care if it breaks Shinobu even more. Friends simply don’t matter to a slut like you when you have a cock like this in front of your face.”

Mai paled a bit. But the words aroused her even further. “I-I… I can’t…”

“Tell me you want to be my slutty little whore. Tell me you want to see me break your mind to little pieces and build it back up as a loving cocksleeve.” Shinoflare growled. “Tell me, and I’ll be even nicer to you than Flare is. She always gives it to your mouth or ass, right? Well, I’ll stick it right in the pussy and mold it to fit me.”

Mai was unbearably horny. Her whole body felt like it was on fire, she could swear her panties sloshed from how wet her pussy was, she needed that cock right then and there. She couldn’t even feel shame anymore, as something in her snapped. “Fuck my brains out, fuck me senseless, make it so I can’t walk!” she cried. “I don’t care what happens to Shinobu! All I care about is your cock! I’m yours, I belong to you, I’m nothing but your cocksleeve and your cumdump!”

Shinoflare grinned widely as Mai declared who she belonged to. Then she pushed her down to the ground and straddled her. “Good girl~ That’s the right response~” she said. Oh, but breaking her like that was so bad… if she gave a crap, she might feel bad about reducing her to this. But it just got her rock hard and ready to get to work.

The fusion was not gentle. She didn’t start slow or work it in bit by bit. Mai was not her lover - she was her property, her personal onahole, and she’d be used like the living sex toy she was. Shinoflare could have cum just from the ecstatic scream Mai made as she slammed her cock down to the hilt in her sheath, but she had more stamina than that. She rested a moment, letting Mai take in the full gravity of how she’d just been claimed. She moved her hips around slowly, letting the delightful snatch get used to her member. “Mmmh~ Just as tight as I like it~ It’s a wonder that a well-used whore like you isn’t the loosest cunt in the city~”

“Hnnn… oh god…” Mai moaned, barely able to form even those words as Shinoflare pulled out and slammed herself home once again. The speed began to build, faster and faster as she pumped into Mai. It was hard to even think for the magical girl turned slut - at least, hard to think of anything but how much she wanted that delightful cock to break her.

Shinoflare, meanwhile, thoroughly enjoyed the way Mai’s body bounced in response to her thrusts, the lewd expression stuck on her face. The magical cloud had settled around Mai’s head, and was busy pushing lewder and lewder thoughts into her mind. The fusion reflected idly on what she was doing, how she was remolding Mai’s very identity to her desires, breaking her and building her back up as a cock-starved slut. Really, it was nearly as bad as how thoroughly she was breaking down her component parts, particularly Shinobu. And that just made her somehow even harder.

The fusion kept going, and going. Mai came, clenching down on her cock and making a mess of the floor, but Shinoflare kept going - she had stamina in spades, and she wasn’t going to finish just because her fucktoy did.

In Mai’s head, the world seemed to fade. The pleasures grew more intense as she saw herself in a different scenario. She was being fucked not on the floor of a gym but in a fancy bed, and there were cameras everywhere. They’d just gotten a good shot of her cumming like a common whore. She almost reached out a hand to stop them. Almost. But Shinoflare’s voice in her ear stopped her.

“You love being fucked for an audience.” she said, “All this pleasure you’re milking out of my cock? That’s the kinda thing you feel whenever people watch you get railed. You’re a real exhibitionist, aren’t you, slut?” she said.

She groaned. In her dream, she wasn’t just being fucked by the fusion. Impossibly, the unfused Flare was there as well - instinctively, she opened her mouth, and the illusory bully rammed her cock where it belonged. She found herself hoping the cameras caught the scene well.

“That’s right, there’s a good cumdump!” Shinoflare said. “You love being fucked brainless for all to see. You’d do it for free, but you get even hornier when it’s for money. You’re going to help your boss start up a little side hustle, aren’t you? You get dicked down, she gets cash and fucks you as a reward, win win.”

Shinoflare could feel how the words changed her cute little toy. She was getting more active in her need, as if trying to put on a show for the cameras she saw. A part of her almost felt bad! At least, until she squashed it and decided to find it hot instead. “Good, tell me what you are~” she prompted.

“I’m your slut! I’m your whore!” Mai shouted, “You can use me however you want, I’m a good little exhibitionist cumdump!” she moaned as she said it, imagining how many people might be able to hear her confession. The thought of getting free, of saving Shinobu, was fucked right out of her. She didn’t care. She just wanted to get so much dick in her she couldn’t walk straight.

Shinoflare groaned with pleasure at Mai’s words. “That’s right. And a good little whore like you gets a reward~” she said. She felt her dick beginning to pulse, and started to thrust more wildly and haphazardly until she buried herself to the hilt one final time.

The climax was as good as she could have hoped. Better. She came and came and came, filling Mai right up. “I hope you remembered your pill!” she laughed - not that it really mattered to her, magical nonsense would probably make sure nothing came of this if they didn’t want it too. But letting her think there was more would be fun.

Mai, for her part, didn’t seem in any state to respond. The sensation of being utterly and completely filled with that perfect cum was too much for her. She came again, and again, and again, until she slumped down unconscious. The feelings had completely overwhelmed her mind.

Shinoflare pulled out. She didn’t feel bad for doing this to Shinobu’s friend - all she felt was deep satisfaction at making good use of her favorite toy. As she pulled out, semen started spilling from the hole. “Hm. Guess I’ll have to clean you up before we leave.” she said idly. “Or they will at least.”

She’d had her fun, but it was probably for the best to split before Mai got too used to Shinoflare. Wouldn’t want to ruin the non-fused Flare’s cock for her! Besides, she’d be back soon enough, probably.

She decided to de-fuse; normally, the process would be one of many things agreed upon by the fusion’s components. But seeing as Shinobu was effectively non-thinking material for Flare to use as she wished just then, it was as easy as a thought.

Flare stretched out as she suddenly split off, grinning her feral smile. “That was good, bitch. I’ll have to keep you around after that! Maybe I can do the same thing to you that I just did with Mai.”

Shinobu, meanwhile, was in a daze as she came back to being an individual being and not just a piece of a fusion. The girl that came around though, was a very very different one to the one who had been forcibly fused in the first place. When a fusion was so spiritually lopsided as Shinoflare was, there were two possibilities. One was a super unstable fusion that wouldn’t even be able to keep itself together for more than a couple reasons. The other was that the dominant partner able to keep the fuse together by force of will would worm their way into the victim’s very soul.

The girl’s dark hair had brightened considerably, taking on a bright red tone reminiscent of Flare’s. Shinobu’s eyes were much the same, a yellow-gold shade now. She was a bit taller, and her body looked a bit more lean. She looked like she might be a little sister to the other girl, or maybe a close cousin.

“Looking good!” Flare cackled at the sight. “I did a real number on you, huh? Still want me to leave that cocksleeve alone after all that?” she asked.

Shinobu blinked a few times. Then she smiled ferociously. “Of course not! That’s all she’s good for anyway, isn’t it? What kind of friend would I be to deny her her fun~” she laughed. The changes to her appearance were quite a lot already, but the changes to her mind ran deeper. “I was such a buzzkill, wasn’t I?”

“You can say that again!” Flare laughed. She slapped a hand on Shinobu’s shoulder. “Why don’t I show you how to have some real fun~? That dream magic of you has some applications!”

Shinobu found herself laughing again. She knew how much she’d changed; it wasn’t like her memory had been altered. But it was so very, very hard to care. She felt good, alive! She was a bad bitch now, and she loved it! “Ehehehe… that sounds great, boss! Can I call you boss?”

“You should call me boss.” Flare said. “You’re part of my team now. You think you can use that dream magic to help me break a few more bitches?

“Of course, boss! I’ll figure it out.” she looked down at Mai. “Maybe we can offer her to some of them. Join up and you get to fuck this popular idol whenever you want!”

“Ooh, I like that.” Flare said. “Help me clean her up for now. I think I have some very nice people I want her to meet.”

Shinobu nodded eagerly, and started dragging the unconscious, giggling Mai towards the showers. Flare watched her go with her penis already stiffening. Oh, but it would be good to have a minion like that around. Another fusion or two, break down those last bits of her old self, and she might even be worth mentoring as a Magical Girl!