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fleur-bbyy · 1 year

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MOTH TO A FLAME

✰summary: kiri is staying at bakugo and his girlfriend’s house when he catches them having sex through the crack of their bedroom door. kiri discovers he’s into voyeurism.

✰ warnings: all characters aged up 21+, SEX (minors and ageless blogs dni!!!!), non-con voyeurism (is that a thing?), kink-discoveryish?, spitting, some degrading, creampie, female reader, oral (f receiving), bi panic for kiri, squirting, bkg is bigger than reader, belly bulge

✰wc: 2.5k

heavily inspired by “private affairs” by @lady-lauren (amazing writer and very kind person!!) might continue this, who knows!!

he knows he shouldn’t be watching.

he’s a guest in his best friend’s house. graciously being able to stay in the guest room while his house is being fumigated. they’ve been nothing but accommodating. feeding him, insisting he not do any household chores, ensuring his comfort during his stay in the house.

how does he repay this kindness?

by watching his bakugo and his loving girlfriend go at it in their bedroom.

eijiro didn’t do it on purpose. he’d never go out of his way to watch his closest friend get to know his girl in the biblical sense. he was simply just trying to go get a glass of water from the kitchen, having to pass their room to do so. he kept his steps quiet, practically tip-toeing down the hall to not wake them if they were asleep. kirishima noticed the door was slightly cracked open as he was about to descend the stairs, but stopped mid-step when he heard the first noise.

he turned his head to look into the room when he heard the slight moans and whimpers that escaped through the crack of the door. it wasn’t opened enough to see everything, but he did see the way your legs were spread and glistened with a light sheen of sweat. your breast were bare, exposed to the gentle glow of the light you always kept on. your head thrown back as more of those sweet moans left your lips. he then noticed the large, calloused hands holding a grip hard enough to bruise on the plush skin of your thighs. strong arms wrapped around them to hold you in place. the blond was between your legs eating you like a man starved and covering your most private of areas with his head. the sight was enough to bring his dick to life and for him to drop his knees to the hardwoods with a soft thud. he hid in the shadows and mentally thanking whatever force compelled them to not fully shut their door.

“fuck kats. i’ve missed you so much. i need you.”

eijiro admired the way you sounded when you were overtaken to the waves of pleasure your boyfriend was drowning you in. he’d never admit it out loud, but he’d always thought you to be beautiful. always gentle, like a ray of sunshine that had fallen to the earth. i’m some ways, you were just like him. a stark contrast to katsuki, eijiro’s other schoolboy crush.

he let his mind drift to wonder about how you’d would taste on his tongue. you’d probably be the sweetest he’s ever had and he’d drink it up with fervor until you’d beg him to stop. he also wonders what’d it be like to have katsuki’s tongue running along the veins of his thick shaft. he accidentally lets a small moan slip, thankfully, it was covered by an even louder one from you as you released on katsuki’s face. thighs clenching and your manicured fingers digging into his blond hair. your hair swished as you threw your head back against the bed in pleasure, mouth forming the classic ‘o’ shape.

he decided to forego the glass of water when katsuki removed his mouth from your pussy to remove his cock from the grey sweats that hung lowly on his hips. he was built beautifully. rippling muscles that covered his entire body and a beautiful adonis belt that led straight to his dick. eijiro wondered if it was weird to call a dick pretty, but it was the only word that could describe katsuki. long and thick, but not as thick as the redhead that was spying in. a beautiful blue vein running along the erect shaft and his tip was a perfect shade of pink.

he pumped himself a few times to prepare to take you. eijiro doing the same. preparing to watch the love-making and passion between two very attractive individuals. just touching himself lightly enough to relieve the ache. ghosting his large fingers over the head and smearing some of his own pre down the length.

he knows it’s wrong

he knows he shouldn’t do it.

but he was too far gone to stop.

he was drawn to the scene unfolding before him like a moth to a flame. watching and admiring bakugo’s cock intently as he toyed with your entrance. rubbing the head up and down your wet slit until you were practically in tears begging him to push in. a loud moan leaving you when he finally does push all the way in. katsuki having to clamp his hand down on your mouth to try and keep you quiet as he began to rut into you. his hands gripping the curve where your waist and hips meet and low groans of his own escaping his mouth.

kirishima kept up with bakugo’s pace. fisting his cock to the rhythm he created as his hips snapped against yours. eijiro wished it was his name rolling off your pink tongue as he fucked you. watching your tits bounce with every thrust given and wishing his could just reach out and touch you.

he also wished to be under katsuki. he wanted to be the person katsuki was sweetly praising and hatefully degrading. wanted to know what it felt like when he wrapped a thick hand around his throat like bakugo had just done to you.

“‘m so fuckin’ addicted to you. pussy’s a drug, baby.”

he shuddered at the sound of katsuki’s voice. stern tone lacing the words that left his lips and made kirishima wish he was on his knees before him. his cock practically jumped in his hand every time bakugo spoke filth down to you.

“‘m gonna fuck you into the shape of my cock.”

“you’re just a desperate fucking slut, so greedy f’me.”

“roll those fuckin’ hips on me, princess.”

having to choke back his own whimpers to remain unnoticed. eijiro relished at the hot tears that ran down your cheeks that katsuki had so kindly wiped away for you before harshly tapping your cheek.

“open up, baby.” you obeyed his every command as a string on spit fell from his tongue and into your mouth. swallowing it without much of a second thought. eijiro’s eyes rolled back as he continued to beat his cock to the sliver of a view he had of the pair of you.

you whined when katsuki abruptly pulled out. he flipped you over and bent you over your shared bed before burying himself back in your wet heat.

“‘s too much baby!” you whined as he pistoned his hips into you at a faster, rougher pace.

“shut the fuck up and take this cock.”

eijiro was getting closer with every stroke of his fist. having to use one of his own hands to help him choke back and muffle the sounds threatening to spill from him. the fire burning in his abdomen only growing every time your ass jiggled from the rough pace katsuki had set. more of his pre leaking out of his slit and quickly being used as lube to keep himself going.

eijiro intently listened as your moans became louder and of a higher pitch. endless strings of slurred and babbling words coming from your mouth as you warned your boyfriend of another incoming release.

“fuck… fuck gonna cum, kats, gonnafuckingcum.”

“that’s it, princess, cum all over my cock. wanna feel you clench around me.”

if kirishima could see your face, he’d bet your eyes would be rolling to the back of your head as bakugo hit that sweet, spongy spot inside of you. he was about to let himself go until katsuki spoke up again.

“i know you’ve got another one in you-“

getting so horny for this was disgusting.

“-so be a good girl for me, yeah?”

but he was willing to be a called-out pervert if that meant he could continue watching.

he slowed the hand that jerked his cock, bound and determined to finish when you cum again. eijiro loved watching you be used as a cocksleeve. loved watching your beautiful cunt grip your boyfriend’s cock and suck it into your body.

and bakugo looked like a dictionary picture of power. he looked so domineering over you. a behemoth compared to your shorter frame. he’s always been strong and just simply better at everything because he wanted to be. nobody ever holding him back from something he wanted. eijiro imagines him to be the best fuck he could ever dream of having, somewhat envying you for being the one that gets to experience it.

“you’re so fucking deep in me.” a another bead of pre-cum rolls out of his slit when he notices the bulge in your belly every time katsuki pushes all the way in. he wishes it was his cock. he wishes it was his stomach. he’s never seen someone look so pretty taking a pounding like this before. bakugo’s hips speeding up as he tries to bring you over the edge before he falls victim to his own release. maneuvering a hand down to toy with your sensitive clit, causing your whines to grow louder and more needy. your cunt squelches with every thrust he gives and you take it all with grace.

“y’gonna come f’me again baby? gonna cum with me?”

he’s so close.

“fuck, kats, please.”

so goddamn close.

your words slur and become airy as if bakugo is knocking all the breath from your lungs. eijiro hopes that his best friend is going to fill your sweet pussy so he can imagine it’s his cum dripping out of you. his balls feel tighter and with every moan or groan he hears spill from your mouths, he finds the coil in his stomach to be twisting tighter. just a few more strokes and he’ll be done for.

“right there, kats! fuck.. please! i’m gonna cum.. i’m cumming! i’m cumming!”

“fuck yes baby, take this shit. cum on my fat cock. cum with me, princess.” eijiro loses himself at the piercing whine that leaves you when you squirt on your boyfriend. watching the clear liquid gush from your tight and stuffed hole sends him and katsuki over the edge at the same time. eijiro biting his hand and drawing blood as he tucks his dick back into his sweats to catch the load of cum that erupts from him. he watched bakugo’s every reaction as he came. head thrown back and brow furrowed as he continued to snap his hips into yours. grabbing a fistful of your hair and pulling you towards him. he watched the way the warm glow of light illuminated the sweat on your bodies and it made him feel as if he could jerk off again.

he payed extra close attention when katsuki slowly pulled himself from you. your hole gaping from being stretched by the massive man and dribbles of his white hot cum running out of your pussy. he intently watched once more as bakugo scooped up the cum and pushed it back in to you.

“not wasting a drop, baby.”

he had to close his eyes before he got riled up again, but he couldn’t bask in the post-nut clarity either. as quickly as possible getting off of his knees and trying to quietly walk on wobbly legs down to the kitchen to get himself the water that he actually needs now. somberly thinking of what he’d done.

eijiro kirishima is not a pervert. he didn’t do shit like that, but here he was. standing in the kitchen of his best friend’s house after busting a nut to them having sex with the wet patch on the inside of his sweats to prove it.

he stared at a dust bunny that had gathered where the countertop and wall met. he felt as dirty as that spot as guilt overtook his body. weighing down his muscular shoulders. the air felt thick and almost suffocating as he tried to take a few deep breaths to ease the shame that had settled in.

carefully making his way back up the stairs, he hoped to just walk on by. hoped that this would be a thing to only weigh down on him and him only. hoped he could put the disgusting, perverted, and voyeuristic act behind him.

you can only hope for so much when you’re guilty.

“eijiro.” he heard the booming voice of katsuki right as he passed the doorway. it was quiet enough for him to question if he was dreaming or not. he stopped in his tracks, glass in hand, to try and hear movement in the bedroom and see if anyone was awake.

“i know you’re out there, ei.” shit. he wasn’t dreaming. he felt the weight on his shoulders double as he tried to find his voice to respond back.

“yeah?” it was all he could muster. ashamed, embarrassed. there’s no way they didn’t know about what he did. he’d been caught.

“come here.” the two words were confusing to kiri, but his legs moved to enter the room anyways. was he going to get his ass beat? kicked out? murdered? he wasn’t sure. but he did know his eyes weren’t deceiving at what was laid out before him.

you were still on the bed, but had flipped over on your back and propped up on your elbows, completely naked. he got a good look at your still hardened nipples and glistening cunt from the fuck you’d had 10 minutes prior. katsuki was also still naked. standing at the side of the bed in all his glory, cock still half hard. eijiro’s eyes widened at the sight.

“i know you were watching us.” is all katsuki can say before streams of ‘sorry’s’ and ‘I swear it was a one time thing’ leaving his mouth before he could even think about what he was saying.

“there’s no need to be a fuckin’ baby about it,” bakugo cut his apologies off, “princess here loved it, didn’t you?” the two men look over at you as you smiled and nodded your pretty little head.

“y’know, we’ve both never came so hard before, so we thought we could reward you a bit.” your voice was sickeningly sweet. you could ask eijiro to do anything for you and he’d do it, no questions ask if you continued to lure him in with your seductive voice. your eyes were half-lidded as you looked up at him through your eyelashes. taking in the bashful expression on his face.

“reward.. me?” kirishima felt weak in the knees again as his cock stirred to life once more at the thought of either of you giving him a little something.

“yeah, yeah. you want it?” katsuki spoke, looking unbothered, bored even. eijiro nodded his head without a sliver of hesitation. his excitement resembled a puppy wagging when a treat is held in front of its face. his entire body felt like it was jumping in anticipation and the pressure holding his shoulders down had lifted. it felt like he’d gotten one hundred times lighter. like he was floating

he gasped when bakugo grabbed a fistful of his red hair and pushed him to his knees, facing your pretty pussy. his tongue darted out to lick his lips before katsuki spoke again.

“you want us? eat my fuckin’ cum outta her cunt.”

eijiro didn’t pay any mind to the dull ache that spread across his scalp. nothing would cause him to hesitate at the opportunity to taste the two of you.

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