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yanderenightmare · 2 months

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All For One

TW: nsfw, noncon, yandere, captive reader, mind deterioration

fem reader

All For One has a habit of subjugating you for his own pleasure.

It’s a game he likes to play—quite like chess, only… you start off with a single pawn, and you don’t know any of the rules. And he’s been world champion ten years in a row. And he plays dirty.

Tonight, he’s dressed you up in a costume. Not any old Halloween costume, but a slutty one. Not a playboy bunny or a maid, nor a schoolgirl—this was worse—a sleazy rendition of your old hero uniform.

You’d barely recognized the faintly familiar design when he first laid it out on the bed for you. Silly and naïve, you thought his games of derision would end when you finally offered your submission, but that was a fool’s thought. What fun were you if not proof of his undying victory—a reminder, a trophy, a relic?

It’s beyond degrading. Tight and revealing. Less than an actual costume, it was more something one would wear in the bedroom, cosplaying for some fantasy starring an overly sexualized you. Only God knows where he’d gotten it from.

Your steel armor, once with the dignity of a knight, had instead been swapped out for a silly silver bikini—the shimmery fabric tacky and cheap, allowing your nipples to peak forth. Covering it was a top and a skirt made up of silver chains, which only further mocked the appearance of chainmail—looking more like the jewelry a stripper might wear.

He’d forgone your helmet, boots, and sword entirely. Truly, if it weren’t for the detailing of the pattern making the fabric vaguely resemble plated armor, it wouldn’t have been much different from any other set of lingerie.

And still, it’s just similar enough to make it sting.

“Look at you...” he jeers, his voice sodden with taunt—carmine stare faded and gleeful, thoroughly enjoying it. “What a sight for sore eyes.”

He stands behind you in the mirror, holding you delicately by the hips, intimately close, dressed in another one of his black suits, fully clothed in devastating contrast to you. His smile curls as he roams your ill-covered body, kissed with the flush of chagrin, leering at you in the reflection—his voice slithering right by your ear.

“Though I can’t say I remember it being quite so revealing, can you?” he jokes, running his hands up and down your waist, fiddling some with the intricacies—metal daintily clinking and clangoring. “No, there’s something else that’s different...”

You feel so humiliated, so small—as if he could hold you up by the scruff of your neck with ease. It isn’t just a feeling—you’re well aware that he most likely could.

“Why yes, of course…” he hums with delayed realization—you know he’s faking for anticipation, chittering while wrapping his thick arms around your tiny midsection, giving you a firm squeeze. “You’ve lost all muscle.”

It’s a painful truth. You don’t know how many months it’s been. Perhaps a year has passed already, maybe even more. He keeps you well aware of his triumph in the outside world, but time still eludes you.

You’d tried maintaining it in the beginning, even after he’d taken your quirk. You’d been vigilant, keeping up your workout regimens just as religiously as before. But you couldn’t pick what you ate, nor when—and he’d only feed you cake. It wasn’t long before all your hard-earned muscles had melted away like popsicle syrup off the stick, licked and lapped right up by the man holding you.

“Mmh, yes…” he murmurs gratingly while swaying you back against him, lips pressing against your ear. “And it’s left you oh-so-soft.”

His bulbous crotch slots against your upper ass, resting there as it grows fatter and warm—a sign of his enjoyment. The weight of him makes you feel all but paper-thin.

His voice rasps now. “If I were to give you your quirk back, I wager you wouldn’t even be able to use it anymore—it would sooner rip your poor limbs apart.”

It’s beyond cruel to suggest—as if disgracing your old costume wasn’t enough torment already. You bite your lip, gnaw it harshly—don’t cry, don’t cry, don’t let him see you cry.

“Isn’t that just fascinating?” He gives your earlobe a gentle bite, and the whimper in your throat springs free like prey out of hiding.

A sniffle shortly followed—along the dribble of the night’s very first tears. Your diminished spirit has made you all too prone to cry as if there’s nothing else for you to do but indulge in the small comfort it gives.

“Oh, sweetie—don’t weep over prowess long since lost. It was never enough to challenge me anyway,” he coos, as if consoling you—swaying your smaller brittle body back against his looming chest, a cage that seemed to swallow you whole.

Steering your jaw, he holds your face still before the mirror, unable to look away as the tears dribble down your sorry cheeks—he smears them further with a kiss.

“The world would chew you up as you are now, fragile like glass.” The grin curling his lips makes you resemble prey caught on a predator’s teeth—you can’t help but shiver at the sight of it. You wish he wouldn’t toy with you like food and just kill you already. “Mark my words, hero—the belly of the beast would not grant you as much comfort as I do.”

His other hand slips down to cup your mound—firmly, with a squeeze that has you curl yourself back against him as he presses two tough fingerpads into your clothed clit, rubbing it tightly enough to make your thighs shake.

“You’re better off like this,” he grunts, snickers at how your weak hands clutch the sleeve of his suit, curling the fabric in your palms until your knuckles whiten—watching the furrow further crease between your cinched brows as you try and bite back your pathetic little sounds even as more tears come tumbling down your swollen cheeks. “Mh, my pretty plaything.”

He makes you continue to look at yourself as he simply slides the panty to the side of your cunt. Encouraging you to place your hands flat against the mirror as he bends you forward, then to step back and stand atop his dress shoes.

“Don’t be shy now,” he makes sure to tell you. “You’re as light and negligible as a feather.”

He parts his feet and yours along with them, spreading your thighs enough to accommodate the fat heat he soon slides between them. Rigid and veiny, it competes with the size of your forearm—so thick that when he slaps it up against your slit, your knees buckle from the impact.

His chuckles rumble across your body like an earthquake. You only realize how much it makes you shake when he encloses your hip in his big hand, steadying you. Holding you still as he drags his engorged cockhead through your lips, catching your clit before resting on your entrance.

You’re so sore from prior nights—countless hours locked in this room with his visits the only thing keeping you company—everything has yet to forgive you for the wreckage those visits leave behind. Your sorry little puss rues and dreads another defeat now as he sinks inside the comfort of your battered walls, one unyielding inch at a time.

You wince and tense, shoulders bracing, and yet he pushes deeper, sliding you down his shaft until you rest at the hilt of his base, kneading the tip into your gummy womb, giving it a deep kiss that bulges out from your poor belly.

The sight in the mirror is morbid, even more so than the feeling—the way he molds your insides to fit him, to cater and house his length and size.

“Ah—just perfect, isn’t it, hero?” he purrs, chest resting heavily upon your spine while dwarfing both your hips in a firm grip, chin-stubble scraping along your neck as his voice comes out hot against your ear, “Obedience suits you so well, don’t you agree?”

Your knees buckle once he starts the heavy pace—slowly pounding into you from behind, dragging out and pushing deep in womb-robbing thrusts. You pant from the toll of it, feeling your muscles give—too tired and too broken to continue acting tough. He’s the only reason you’re left upright on your feet—keeping you standing with just his hold on your haunches. It seems like nothing to him, though it feels like the weight of the world to you.

“It’s only a shame it had to come with all these scars.” He clicks his tongue, eyes raking across your body as it takes him, resting on each mark disrupting the otherwise milk-smooth skin. “If only you’d accepted your place sooner.”

The ember burning within you is all but a piece of cooling charcoal now. You feel it diminish every day, leaving you even thinner than before.

“But then again, I quite enjoy you like this—littered with my battle scars from your toes up to your crown. It’s rather intimate, isn’t it?” he hums with a smile. “Proof of all the times I could’ve quashed you beneath my foot like a pitiful bug but decided to spare you. Teach you how to worship like the weak ought to.”

There was a time when you still humored the thought of killing him, even with your quirk taken from you. You thought, in your foolishness, that being this close to him must garner an opportunity, any, however slim, just enough for you to take advantage and finish what you vowed to end so long ago.

Now, you almost don’t care anymore. The world had moved on without you, and there was nothing more you could do about it.

You realize your promise had been as cheap as this outfit.

“The greater the fall, the sweeter the surrender, isn’t that right?” he states. “Doesn’t it feel good to finally accept your place in the world, hero?”

You can only nod your head and agree.

♡ BOKU NO HERO ACADEMIA masterlist

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