Yandere Kimetsu No Yaiba - Tumblr Posts
WRITTEN

CHARACTERS. kibutsuji muzan, akaza, doma ︴WC. 4.8k
SYNOPSIS. your parents had raised you to believe that everything happened for a reason, that everything was connected to fate in a sense. it just made no sense how they chose you, of all people.
WARNINGS. PURGE!AU, DARK CONTENT, NONCON, fear play, fuck-or-die, choking, no prep, unprotected sex, rough sex, creampies, blood-sucking, cum-eating, breaking bones, biting, elements of cannibalism, sadism, reader loses consciousness, giyuu is featured as a love interest; this is by far the grossest thing i’ve ever written.
✉️. for those who might have forgotten, marechi blood is the rare blood type that demons go crazy over as it’s super intoxicating.
this is the prequel of another 2K SPECIAL fic i have, featuring tengen and sanemi: SALVATION — which means you can read this as part one :)

“gotcha!”
your loud shriek echoed across the nightmarish forest at the words being whispered right into your ear.
leaves were rustling and branches snapping to your left and right, behind and in front of you, but there was no one.
at the beginning of this cat-and-mouse game, your senses were still good enough to somehow catch up with the demon chasing you down. but now? you had entirely lost track of time, but it had to be more than two hours of futilely hiding behind and on top of trees, before hearing or feeling him close, and escaping further into the woods.
your attempts to outsmart the upper moon were in vain, you had realized that at the very beginning. there was no way that you, a mealy kanoe ranked demon slayer, could overpower or even just run from that monster. you had nothing on him.
DOMA, upper moon two. it was terrible, terrible luck that you two had crossed paths. you were not prepared in the slightest. one could argue that as a demon slayer, you had to be prepared for anything at any given time.
but meeting one of the strongest demons while on a mission to eliminate demons that were actually fitting of your rank had not been in your plan. you hadn’t asked for or expected any of this, actually.
where your crow was, you had no idea either. it wasn’t even there to give you directions into this dizzying, dark forest of death where demons were said to lure innocent girls in.
you felt cheated. it was odd how you hadn’t gotten sent on a single mission so far, and suddenly, you had. where was that damn bird when you needed it? it could’ve flown off to notify any demon slayers nearby for help hours ago. it was like that useless crow of yours had set you up for failure
“okay, you know what?” you stopped running suddenly, hand placed on the sword fixated against your hip as you turned around. while gasping for air, you wiped at your sweaty forehead, hissing at the gash on your upper arm. “i’m done running and playing games. just come out.”
upon recovering your stamina a bit, enough to properly utilize your enhanced senses, your eyes sharply snapped to one of the trees, revealing a shadowy figure sitting cross-legged on a thick tree branch, waving down at you sweetly.
“tired already?” the lilt in his voice was mocking, condescending almost. “how disappointing. i was just starting to have fun!”
the light of the full moon illuminating through wavering leaves revealed the demon in question.
wide, rainbow-colored eyes creased when they met yours as the moon shone even brighter to flash you his rank as if once again telling you you didn’t stand a chance. even nature seems to have found a way to laugh in your face at a moment like this. the demons’s platinum blonde hair flowed slightly in the wind, and you felt captivated by his presence alone.
how could a demon look so… divine? it made no sense to you. he looked so perfect and pretty that you felt dizzy.
he didn’t make a move to stand up, kill you or do anything, merely opting to place his face in his palm, long, blue fingernails tapping against a pale cheek. the way he observed you made you shiver. more so when his lifeless lips stretched into a scary grin, mouth opening to reveal a set of poignant fangs to you.
the tip of his long tongue left his mouth to run over his lips and teeth at the sight and scent of your blood. it made him so delirious, and you had no idea. of course he wouldn’t let you go with a blood type as rare as yours.
your blood smelled so tasty to him that the fingers he was tapping against his cheeks cramped up, making veins pulsate on his hand and face, begging and yearning for your crimson.
he had to have you.
your heart beat so fast against your ribcage that you felt it in your throat. everything about him told you to run, to save yourself, but your head told you that it wasn’t of any use. there was no getting away from this demon.
“you do look exhausted, though,” he added after being met with nothing but silence on your behalf, “is the demon hunter life not treating you well? i do know something else that might. wanna hear?”
you didn’t want to hear what he had to say. before you could tell him to zip it, he already continued talking. “you have two choices, darling,” he cooed, lifting his index and middle finger as if you were illiterate. “i either devour you, or you become a demon. directly under yours truly!”
huh?
doma totally disregarded the irritation on your face as he chuckled into his palm. it was basically a monologue at this point. he was so full of himself. like he was some sort of god. there was a high chance he thought of himself that way.
“well, what’s it going to be?” he pressed, “you should be grateful i’m even giving you a choice, sweetie.” when he again didn’t get a response, he stifled a yawn while his hand dug into his skin, drawing blood. “this… is getting boring—”
“do you ever shut up?” you scowled at him, and his innocent smile dropped instantly at your words and the glare on your face. “i’m trying to conjure up enough energy to fight you, and all you do is get on my nerves.”
truth to be told, it was most likely the adrenaline of staring death in the face that made you respond to the powerful demon like that. maybe there was also a pinch of despair upon dying so soon included there. you were just 19, your life was supposed to begin just now.
in reality, it had ended when you’d been pushed to join the demon slayer corps. in a family that had strictly let all of its children join said organization for generations, you were no exception.
“you’ll understand soon enough,” your mother had told you plainly while your father wouldn’t even face you, “you were born for this. to avenge our ancestors.”
looking from your sword that you carefully retracted from its sheath, then back to doma, almost made you chuckle.
this was the demon kanae kocho, former flower pillar and sister of the current insect pillar, had given her life fighting against. it wasn’t even in the equation that you could inflict any kind of injury on him.
but, you were born for this. this was written.
“for that comment alone, you’d be in pieces already by my hands,” doma pouted, feigning to be hurt, “but since you are so keen on fighting me, i will grant you that wish. oh, how generous of me!”
the stoicism was still deeply etched in your features as you concentrated your breathing while the hand you had wrapped around the sword’s handle was shaking. doma waited patiently for you to attack, smile reappearing on his lips as he smelled your fear.
you smelled delicious. he couldn’t wait to feast on you. he had always looked forward to eating young, pretty women like you, but this was different. this was an excitement he’d never felt before. and he knew exactly why.
even in your concentrated state, you failed to notice the two other strong presences approaching where you two were. they hadn’t expected that doma actually found someone as stupid as you to enter this forest on a day like this.
before you could utter out your breathing style and its form, a cold hand found the back of your neck from behind, the slightest touch being enough to send you flying against the closest tree.
the next time you opened your eyes, you found yourself on the ground, staining the soil and grass beneath you with the blood you were hacking up.
that one blow was so powerful — hell, it wasn’t even a strike. it was just a hand touching you. what kind of creature could be so powerful?
with great efforts, you supported yourself on your hands to sit up, opening your left eye slowly as you now had blood flowing all over your right one from a gash on your forehead.
when your open eye drifted ahead and then higher, you were met with a pair of red, devilish eyes. your eye covered in blood snapped open, both of them growing wide at the man — there was no way in hell he was a human — standing in front of you.
“how weak,” he uttered, while you could barely breathe, paralyzed on the spot at how much energy radiated off of him. he was dressed in all black, in rather formal wear, definitely looking out of place.
his skin looked too pale to be normal. and, you felt your heart dropping all the way to your gut when he breathed through his mouth, making sharp canines glisten under the moonlight.
you were downright petrified. what kind of demon was he? he had to be one. but he was no upper moon. was there any kind of higher group you hadn’t been told about—
“lord MUZAN! you wasted at least five ounces of her valuable blood,” doma’s chuckles sounded from behind the man — did he just say lord muzan? “i’m sure i could have defended myself. just got a little… riled up from her scent.”
muzan… muzan… oh fuck.
demon king kibutsuji muzan. he was standing in front of you in all his glory. and you couldn’t curse your fate more. his presence was so intense that the hands you’d supported against the ground wobbled, making you fall back down again as you wheezed pathetically.
his eyes seemed to twist at the sight of the blood on your face and arm, kimono ripped on your upper arm by now to reveal tender, injured skin. his pupils dilated, but other than that, he didn’t seem unhinged or distracted. it seemed like he had a resistance to whatever was up with you — which you still had no clue about.
“l-lord muzan.” another voice sounded, a more timid one, reserved even, and you were barely able to look past the demon king to see a third of the bunch. through blurry eyes, you sighted yellow eyes with blue sclerae with the writing upper moon in one, and three in the other.
you were done for.
“do not question why you are here, AKAZA. you should know very well why.” muzan didn’t bother facing either of his two henchmen. the pink-haired flinched a little at the tone of his lord, staying at a respectful distance from you as his body tensed up, while doma giddily approached the two, and you.
“stand up,” the demon king ordered you, and you gulped, shakily doing so. your sword was laying somewhere, having been flung away from your hand when he had thrown you across the woods. you wiped your face as well as possible, about to clean your palm afterward on the fabric of your ruined kimono, but doma tutted with a crazed grin. “don’t do that. leave that blood right there.”
you didn’t understand. they were about to kill and eat you anyway. so what did a little bit of your worthless blood wasted matter? you were going to be sitting in their stomachs in a few minutes from now.
“she has… no idea,” akaza stated as his pink eyebrows creased, making the blue stripes across his face shift a little as he started salivating. doma was barely able to contain his excited giggles. “oh, my… poor thing.”
“w-what?” was all you were able to muster up as you leaned against the tree trunk behind you, legs nearly giving up on you. your eyes never left those of muzan, neither did his yours. you were so scared of evaporating into thin air if you moved as much as an inch.
“that blood of yours,” the tallest of the three grinned, licking his lips, “ever heard of marechi blood?” your face went blank. there was no way. doma ended up laughing like you had just cracked the best joke.
there was no way you had the most desirable blood type. the one that demons went crazy over and ripped each other to shreds for.
akaza shook his head in disbelief. “i despise this guy,” he uttered, all while muzan stayed calm. or seemed calm on the exterior. the other two, not so much. they’d already have jumped you if their lord wasn’t here, you were certain.
they acted like it was just a mundane scenario between them. like it was normal. it probably was. but for you, not really. not when you were in limbo between life and death, quite literally.
it spilled from your lips before you could stop yourself. blame it your survival instinct.
“please don’t kill me,” you mumbled with wide doe eyes while your fingers dug into the tree trunk, causing splinters to dig into your skin that made you pull away like you had been burned.
every droplet of blood would make the situation way worse than it already was, and it did, shown by akaza’s and doma’s breaths getting heavier by the second.
“i’ll do anything. i wasn’t trying to find either of you… i was just after—”
muzan lifted his hand, and you winced, instantly cutting yourself off. “i didn’t ask you to talk, human,” he spat.
the demon slayer corps suddenly crossed your mind. would the pillars also have begged for your life like you had just done? they would have spat in your face if they saw and heard this, for sure. perhaps you should be ashamed.
but then again, none of them have been cornered by three of the strongest demons to have ever existed. none of them had ever faced the demon king, as far as you knew. or any of the upper moons.
so, you felt anything but shame in this very moment. you just wanted to get out of the situation alive.
“what do you think she meant by anything, lord muzan?” the upper moon two quipped, thick eyebrows raising as he took in the sight of your fearful self. “i’m curious. care to elaborate, stupid little thing?”
tears of despair welled up in your eyes, which made doma cock his head to the side and jut his lower lip up. “is this really necessary?” akaza glared at the other upper moon, eyes narrowing. “she is obviously scared for her life, doma. cut the crap.”
“don’t be such a buzzkill. i know you want a taste of her as well,” the long-haired demon laughed, eyes disappearing into small crescents, “they always taste so much better when scared. you wouldn’t know that, of course. but there’s a first time for everything, right lord akaza? it will be my first time tasting this blood, too.”
said demon didn’t respond. it was muzan who spoke again. “if you want to live,” his bland voice made you grit your teeth to stop your lips from trembling, “then strip.”
you had no time to process muzan’s order — literally no time, as he looked like he’d make you vanish if you didn’t comply. with your cheeks burning in shame, you slid your kimono off, making it thud to the grass beneath you as you now stood in your underwear, socks and slippers. doma suddenly stood in front of you, hand wrapped around your injured arm as he leaned forward to bite a chunk off. you choked back a scream.
“doma,” muzan warned, causing the demon to stop with sharp teeth grazing your soft skin, being so close to your blood, and he could feel his cock twitching, fully hard at this point. “akaza is first. move aside.”
with a whine, doma pulled away, barely able to do so as his body and his dick diligently tried to keep him right where you were.
“what am i supposed to do, lord muzan?,” the pink-haired demon questioned as politely as possible, while fighting against his twitching hands that wanted you. “i don’t… i don’t hurt women.”
the man with black, curly hair gritted his teeth as he sent akaza a glare that was quick to get him back to his senses.
you didn’t want to be here for even a second. you just wanted to pass out and wake up again when this entire ordeal was over. you felt so exposed, so bare — which you were, halfway — as the cold night air made goosebumps form on your skin.
what were they planning to do to you? if their goal was to kill and eat you, they would have done so long ago, wouldn’t they? they wouldn’t be wasting their time like this if they could have just easily finished the job in a matter of minutes.
not that you had any idea how long demons took to digest a body, but judging by the hunger in those demons’ eyes, you were sure it wouldn’t be long. come to think of it, you really didn’t want to think about getting eaten. it was even worse than thinking about death solely by itself.
the last thing you’d want is to be sitting in their stomachs.
which was why you had to go along with whatever they had in mind. it could only be terrible, given that they were demons, but you guessed that anything was better than dying.
“have a taste,” muzan told the shorter demon who gulped while approaching you with bare feet as if you were something he was terrified of. was he scared of women or something like that? it confused you. you didn’t want to grant yourself the relief of knowing that there was one among the three who didn’t want to hurt you — he was a demon for a reason, still.
akaza stared at your body like it was the first time he had seem a woman like this. with every cautious step he took toward you, you backed away further into the tree. you had no room to move away, nowhere to run.
his fingers that were painted dark blue until above his knuckles settled on your shoulder, and you jumped at how cold his touch felt. shaky digits reached the gash on your arm, and you bit your lip when they mindlessly dug into it, causing more blood to be drawn out. he retracted his fingers seconds later to raise them to his mouth, sniffling and licking them with his yellow eyes never leaving your teary ones.
you knew you were done for when even the one who was opposed to hurting you had his eyes rolling into the back of his head when he sucked his digits clean of your blood. all the control and self-restraint in him left with one single act.
the same hand shot up roughly against your neck, pinning you against the tree as you spluttered at the suddenness. insanity was mirrored in his eyes as he ripped your bra off your body, followed by your panties, all while you choked and squirmed in his death grip. you were sure he’d snap your neck in half if he applied any more pressure than he was right now.
your hands weakly pulled at his striped forearm, but he was far too gone to notice. “t-turn around,” he stuttered with a strained voice. eventually, he let go of your neck, bending his wrist backward so it forcefully snapped from your throat. his broken bones regenerated at the speed of light while you were gasping for air, knowing you’d have died if he had held that grip on you a little longer.
“you nearly killed our prey, lord akaza,” doma taunted the pink-haired demon, “take it slow. want me to—” a low growl erupting from his throat cut the higher-ranked upper moon off, and he positioned you so your chest was pressed against the cold wood, back arching uncomfortably.
you sniffled and panted when the fabric of his loose pants came in touch with your bare ass, and weak cries of objection spilled from your mouth. your throat was hurting, you couldn’t really breathe, your arm hurt, you were scared for your life.
was he really going to—
“n-no, please—” you protested weakly, hands flailing behind you to push at akaza’s body, do anything to stop him from doing any more of what he was doing. he had pulled his pulsating, needy cock out that was oozing with precum, distributing it over your exposed cunt messily as he humped you for some relief.
“such a pretty pussy,” doma snickered, “she doesn’t smell like a virgin. i wonder who’s had the honor of being inside of her. some lucky, mortal bastard...”
tears of despair dripped down your face when an image of him flashed across your head. you two had never been able to actually become anything more than two people who weren’t supposed to meet up and get intimate with each other. but, that made it more difficult to stay away from each other.
which was why you’d always ended up entangled in each other’s bare bodies, drawing out the prettiest sounds from each other. giyuu
“shut up, doma,” akaza grunted as he sloppily tried slipping his cockhead inside you, slipping up a few times, which made him feel frustrated. “i don’t want to hear your annoying voice. just— oh, fuck!”
you felt like throwing up when he slid his long cock inside of you in one go. a weak, hoarse moan was all you could let out as your wrists were grabbed carelessly by akaza to hold them behind your back.
he forced your back to arch even more, bringing your bare upper body against his scarcely clothed one, and he started fucking you against the tree. your eyes were wide and glassy, countless tears streaming down your cold cheeks as he fucked you so hard that your face got bruised by how it rubbed against the tree trunk.
akaza’s lips blindly found your bleeding upper arm to lap at it with his hot tongue, making you cry out in pain at the burn of his saliva touching your wound. it felt like alcohol was being poured all over it.
he sucked at your wound until you started feeling lightheaded, and it was just his tight grip on you that was keeping you from collapsing to the ground. akaza’s boyish moans and grunts filled your ears, and you felt ashamed when you felt yourself producing arousal.
you didn’t want this. not at all. it wasn’t your fault your body was reacting like this. you didn’t mean to betray giyuu like this—
“you’re— so… hah… tight!” with that, the upper moon three emptied himself inside of you without a warning, your own body twitching at the sudden feeling of being filled up. he pulled out almost instantly to stagger away, revealing the lower side of his face that was coated with your blood.
doma was quick to catch you, turning you back around while you coughed and tried to regain your composure, shivering from the demon seed running down your thighs.
“how cute,” he chuckled, and you felt his long, claw-like nail nearing your hole to scoop akaza’s remaining cum out, “open up, dollface.” when you didn’t and instead shook your head feebly, he shoved his long fingers inside of your mouth anyway, making you gag on them as the taste of bitterness coated your taste buds.
through half-lidded, fuzzy eyes, you saw muzan standing right where he had stood before. “let’s give lord muzan a show, shall we?” doma smiled sweetly before lifting your body with ease, bending your legs at the knees to wrap them around his clothed hips.
he was impatient, hands quickly ridding himself of his pants to impale you on his cock. this time, you were way too dazed to even be reacting to it. it didn’t hurt as much as it had hurt with akaza either, given that you were now wetter than you had been before.
doma chuckled breathlessly as he was inside of you, grinning diabolically as he supported your back against the tree. “what a pretty sight… eyes on me, little toy.”
your chest was now on full display, littered with bruises and cuts that the cult leader leapt forward to suck at, moaning at the coppery taste. his thrusts were slower and more calculated than akaza’s, but they were just as rough.
your eyes rolled back when his fangs dug into your chest, breaking the skin and suckling on your supple tit as you writhed in pain before it turned into numbness. with every thrust and every bite, you started feeling less. your vision got darker than it was, and no more quiet sounds of ‘no’ and ‘please’ would be formed in your mouth.
everything felt weird, everything was spinning, and before you knew it, you’d blacked out.
you were brought back seconds later by doma, who wouldn’t have you passing out on him. he hated fucking corpses, after all. such a shame you had no more fight left in you. well, at least you were pretty and your blood was nutritious.
the harsh smack delivered across your face had your head whipping to the side, and you were suddenly hyper-aware of your surroundings. not much had changed, doma was still jackhammering into you, and no one was there to help you.
more biting, sucking and a few more seconds of brutally pounding into you made you reach an unwanted climax as well that forced doma to cream inside your tightening walls with a low whine. he took a minute to recover before pulling out of your heavenly pussy, making his white cream dribble down your abused hole.
you should be grateful he came inside a worthless and weak human like you.
doma mindlessly let your battered body hit the ground, and you didn’t even hear or see muzan approaching until the tip of his dress shoe tilted your face up forcefully by your chin.
you had no more energy to struggle against it anymore. if you lost any more blood, you probably wouldn’t recover. what difference would it make if you did recover? you had gotten violated by demons. there was no more purpose for you.
giyuu was going to hate you.
“open your mouth.” muzan’s monotonous voice could be heard, although muffled, as your ears kept ringing, announcing that you were at your wit’s end. sitting up with the remaining power you had left, you parted your lips and squinted your eyes shut. you could tell what was coming.
“a whorish, weak slayer like you does not deserve my seed inside of you, let alone deserve to touch me.” his words were streaked with venom, like he had a personal vendetta against you, like you’d done anything to hurt him.
the sounds of slick and something slippery caught your ears, but you didn’t dare open your eyes. he was going to taint your face and mouth too, now. to make sure no spot of your being was untouched by demons.
you were surprised at how resistant your body had been throughout it all. for someone as weak as you, you didn’t snap so easily. but you weren’t going to survive this anyway, so it didn’t matter.
at least you’d tried.
when ropes of muzan’s hot cum hit your cheeks, lips and nose, you recoiled, feeling disheartened and utterly humiliated. all you could do is shake on the ground as you let the translucent liquid drip down your face and body.
you could hear retreating footsteps until only one more presence was nearby. it was doma.
“come to think of it. who even sent you here on a day like this?”
a droplet of cum landed on the back of your hand, and it felt so hot and weird, so inhumane that it burned your skin.
“today’s purge today, a day meant for demons to ravage in these woods. anyone who told you to come here wanted this to happen to you. or who knows, maybe you asked for it!”
your mind was far too woozy to be thinking about it, but… it did make sense in a way. was that why your crow hadn’t accompanied you here all the way?
“but oh well, at least you served a greater purpose! we didn’t even feel the need to devour you. such luck.”
how lucky you were. it was written that you’d be surviving. maybe this was what your parents had talked to you about?
it seemed almost too calculated when you passed out, and awoke to two familiar voices around you, bickering among each other hushedly. a pair of bulky, strong arms covered your remaining decency as fuchsia and lavender eyes exchanged glances.

tagged: @sintyu @fionawinxhester
just send me an ask if you want to be tagged in my future works :)
May I make a request for Muichiro?
General Yandere Muichiro Headcanons
a/n: reader is the same age as Muichiro in this, can be read as platonic or romantic
tw: yandere themes, overprotective behaviour, potential spoilers for Muichiro’s backstory

•Muichiro, despite his young age, has many impressive feats. Being the youngest member of the Hashira has gained him notoriety— though most of his notoriety stems from his apathy.
•His blunt and air-headed nature often scares people off. He doesn’t mind or care. But then, there was you. A seemingly constance in his life. Originally, Muichiro didn’t care for or about you. Especially when you were so beneath him. You were a lowly Kanoe while he was a Hashira. Regardless, you seemed determined to remain by his side and he didn’t care enough to stop you.
•Eventually, he becomes accustomed to your prescription in his life. You’re something to remember- something Muichiro lacks. While his demeanour doesn’t change outright, there are subtle differences that indicate his attachment to you. He acts more considerate towards you than others and tolerates your behaviour that he wouldn’t tolerate from anyone else.
•His feelings become more obvious after he regains his memories. Once he remembers the loss of his parents and brothers, Muichiro develops overly protective tendencies. The loss of his family burns fresh through his memory and influences his treatment of you. He doesn’t want to even imagine losing you. Also, similar to his treatment of Tanjiro, Muichiro openly begins to display his affection and bias towards you.
•Overall, Muichiro is a very lax yandere. He isn’t doesn’t meddle with your daily life or your relationships with other. He also doesn’t limit your freedom, at least until he regains his memories. Even then, Muichiro only really prevents you from going on really dangerous missions, or will accompany you if you do go.