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Summary:

Tanjiro lost interest around the two and a half hour mark, retreating from the dead lift to go scroll on his phone. The whole room was empty besides the two of them, and a teenage employee chewing gum and taking selfies at the counter. She wasn’t paying attention to them. Even if she was, Tanjiro didn’t think she’d yell at him for sitting somewhere he wasn’t suppose to.

Right behind the squatting mats.

That became his place of refuge whenever his engagement battery ran low, which drained quickly. Maybe it was the ‘boredom’ he mentioned, or possibly it was that when he sat behind Zenitsu’s workouts he had an unobstructed view of whatever he wanted to see. If he was being honest, it was definetly that.

Or; Tanjiro is an indecent pervert who likes watching Zenitsu do squats.

Notes:

Under anonymous tag, but same author of Icecubes if you recognize it

(See the end of the work for more notes.)

Work Text:

Tanjiro had long gotten bored of the gym.

Lifting weights for an indefinite amount of time wasn’t his ideal sense of working out. His usual ‘workout’ consisted of helping in whatever way he could. Carrying heavy logs, going on long grocery runs for multiple of his neighbors, walking dozens of dogs, — whatever he was asked. The more physically challenging, the more enjoyable. 

Zenitsu, his roommate; however, did not find any of those things delightful. He’d giddily wave Tanjiro a goodbye whenever he left home, all snuggled up on the couch with a tub of ice cream in grasp. He’d play something on the TV — what was it called again? Some sort of romance drama that jerked tears out of his sockets on the daily. It always made Tanjiro anxious whenever he got a whiff of Zenitsu crying. He didn’t like the show because of that.

That life was consistent for the first couple years of them living together. They’d been best friends all the way through elementary, middle school, high school — even went to the same college. Tanjiro knew Zenitsu better than he knew himself. Zenitsu loved to be lazy.

So it was more than a shock when Zenitsu came running to Tanjiro’s room in the middle of the night — crying about wanting to go to the gym. He whined, begged, pleaded with the redhead to drop whatever chore he had scheduled the next morning so he could accompany. Of course, Tanjiro did. 

For the past couple weeks — Mondays, Wednesdays, Fridays, Saturdays — they’d be at the gym from 9AM all the way to 12PM or 2PM, depending on the day. 

Today, it was getting close to 2. 

Tanjiro lost interest around the two and a half hour mark, retreating from the dead lift to go scroll on his phone. The whole room was empty besides the two of them, and a teenage employee chewing gum and taking selfies at the counter. She wasn’t paying attention to them. Even if she was, Tanjiro didn’t think she’d yell at him for sitting somewhere he wasn’t suppose to.

Right behind the squatting mats.

That became his place of refuge whenever his engagement battery ran low, which drained quickly. Maybe it was the ‘boredom’ he mentioned, or possibly it was that when he sat behind Zenitsu’s workouts he had an unobstructed view of whatever he wanted to see. If he was being honest, it was definetly that. 

It was a bit trickier to stare with other people around — some glared at him like he was a filthy pervert — but none actually ratted on him. If they did, Tanjiro had the charm to get himself out of trouble, and Zenitsu would defend him wholeheartedly

”Tanjiro? No way! He wouldn’t do something so indecent!”

Ah, sweet Zenitsu.

Days like these — where it’s quiet — were Tanjiro’s favorite. Nobody to distract Zenitsu, and nobody that could catch Tanjiro shamelessly edging. 

Tanjiro wasn’t necessarily a pervert .. he just purposefully conditioned Zenitsu into wearing the tightest pants he owned. The tighter, the more it shows — and right now it gave Tanjiro the full delicious sight of Zenitsu’s ass. 

“Tanjiro are you sure? Shouldn’t I wear something easier to work out in?”

”Trust me Zenitsu! Why waste one of your nice pants when you can wear something you don’t use often?”

”Mm.. I guess I see what you mean..”

Zenitsu always started with curling — and, god it was as if he did it on purpose — but then progressively got more and more lewd with his exercises. Well, lewd to Tanjiro’s peeping eyes atleast. 

Squats were the last of what he did, but also the longest. Zenitsu panted from exhuastion, sweat stringing down the side of his face. Muscles strained, burning into his flesh as he tried his best to press on just a little bit longer. His shirt was idly tossed to the side, sweat drenched and gross. 

The blonde’s body glistened, the bright light above their corner of the room making him absolutely glow. It was due to the sweat and droplets of water from Zenitsu’s messy water breaks — but Tanjiro liked to believe it had something to do with being ‘so damn gorgeous’ as he thought.

He soaked up all that his eyes gazed upon. Zenitsu’s leggings hugging tightly around his ass, plump and thick. It didn’t leave any room for Tanjiro to conjure up something with imagination. He watched with a small smile as Zenitsu stood  — then squatted down. Was it just him or did it seem to get fatter after each squat? It was probably just him. 

Part of Tanjiro wanted to chat with Zenitsu while he worked out — but the blonde had headphones in. He claimed the sounds of people panting from every room surrounding theirs was distracting, and uncomfortable. His heightened hearing wasn’t helping him in the slightest. So, he sought music to help him out.

Tanjiro made his playlist for him, of course. Naturally, he added songs with a fast pace beat to influence Zenitsu into squatting to the music. Quicker music, quicker squats, more for Zenitsu’s workout, and more for Tanjiro to see. A win-win.

Every time he bent down, arms folded in front of him, Tanjiro held back a whine. His hand draped over his crotch, stimulating his clothed dick while watching hungrily. Zenitsu’s breaths were amazing to listen to. Hearing him panting at each squat .. his ass in just an arms reach .. presenting itself to Tanjiro at each time he went down. Ugh, Tanjiro had some honorable self restraint. It would be so easy to grab the blonde, shoving him against the wall.. sliding his boxers down to his ankles.

How does he phrase this? Oh, yea. Zenitsu’s ass was really fuckable. 

Slipping his cock between the boy’s plump thighs shouldn’t be a problem. He’d gladly do all the work if it meant he’d be allowed to fuck Zenitsu mercilessly. Not only was his lovely boy so pleasant to be around — but his figure was so.. ah.

Zenitsu’s body was so — feminine, yet masculine at the same times. One moment, he was built, sweat dripping off his neck with his packed abs in full flexing view. His calves stiffened as he ran.. face so intently focused. Tanjiro had to leave Zenitsu’s marathons often, going to the bathroom to jerk himself off so his spectator’s boner went unnoticed. 

Other moments, the two ‘platonically’ snuggled up together on the couch, Zenitsu cozing up to Tanjiro’s lap. His thighs hugged the younger boy’s waist.. his hands soft and delicate over his chest. His adorable little face was all pudgy and squishy, something Tanjiro loved to play with when the blonde fell asleep on his shoulder.

Tanjiro couldn’t jab a label on how Zenitsu looked while squatting, maybe a healthy mix in the middle. His body — feminine. His pants and whineds — masculine. Every motion Zenitsu made sent a spasm straight to Tanjiro’s dick, practically edging it himselfGod. That’s a nice thought. 

Tanjiro checked his phone, his eyes scanning across 1:24PM. He adverted his gaze back to Zenitsu (or, his ass) and it was clear he had no intention of stopping anytime soon.

Fuck. Tanjiro couldn’t take this anymore. He was beginning to wonder if he could get so hard that it became a hazard to his health. 

Against his better judgement, he reached out to grab Zenitsu’s hand, giving it a gentle tug. Tanjiro cherished the last squat the blonde made before he stood up for good, taking off his headphones and facing Tanjiro. 

“Everything okay?”

agh — how does he go about this..

”How’s your workout going?”

Zenitsu’s neutral face cheered into a grin, already profoundly happy at the interest.

“Great! I’ve been able to squat longer than I could at the start of the week! Progress! I knew coming here would here would help!”

Zenitsu stretched out his arm, reaching down to pick up his canteen. Strangely, while he worked out — he was a messy drinker. Usually the boy was so careful when drinking a home. Perhaps it was to cool himself off? Tanjiro wasn’t sure; but as he took a sip, water dripped all down his chin and onto his abs. 

that was a nice sight. 

Tanjiro’s dick thought so too.

”Anyway, what do you need again?”

“Oh, uh..”

Tanjiro smirked, his lip licking his lips wet.

“Let’s go to the bathroom.”

 


“Oh, yea I’ll be right here. I’m not going anywhere anytime soon.”

Zenitsu simply nodded, screwing the lid back on his canteen and placing it back down on to the floor. His stuff was collected in a pile right besides the mat. 

Tanjiro held back a grumble. Zenitsu misunderstood. 

“No.. both of us.”

An eyebrow cocked on the older boy’s face.

”Uh.. do you need me to hold it for you or something?”

Agh. Tanjiro’s pants throbbed at that joke. He would love that. He prayed Zenitsu couldn’t .. hear boners, if that was even a thing. 

“No uh.. just come with me.”

“Tanjiro.. come on.. I’m almost finished..!”

There it was, that whiny voice. It cracked multiple times a sentence, his lips pouting while his arms lay cross on his chest. Zenitsu was so adorable. Tanjiro loved to see him in this type of mood. If he could just tease him forever he’d be eternally happy .. but he knew babying was his best route if he was to get what he wanted.

He stood up off his bench, stepping forward towards Zen, cupping his face in his palms and squishing his cheeks. 

“Come on Zenitsu.. please…?”

Tanjiro cooed, enjoying the close up smell he had of Zenitsu all sweaty. He felt the droplets of sweat condensating off the boy’s skin. All wet and gross. Tanjiro loved it. 

“Agh! Tanjiro!”

The blonde protested, attempting to grab Tanjiro’s wrists to halt his ‘attack’. It failed, miserably. Perhaps the reason Zenitsu wanted to workout so much was the heavy difference in their physical strength. 

“Come with me.. please? You’ve already gotten so strong today.. what’s one minute with me?”

Tanjiro knew he had an effect on his lovely boy. All the redhead needed to do was praise him, baby him, and tell him how much he valued his friendship — and boom, he caved.

and yes. He caved. 

“Fine.. but I still don’t see why I need to escort you!”

Tanjiro bit back a snicker. He just smiled cheerily, grabbing Zenitsu’s hand like always and squeezing it gently. It was easy to misjudge them as a couple, and Tanjiro liked to keep it that way. Zenitsu always whined about nobody asking him out — but with Tanjiro hovering over him like a protective dog, he was definitely the reason. 

It’d gotten more noticeable — especially while they were at the gym. Tanjiro needed to let everybody know that Zenitsu was subconsciously taken. Was Tanjiro shamelessly groping the blonde while people were watching? Of course he was. But he left a centimeter of space between his hand, and Zenitsu’s body. Unfortunately he could only make the motions of grabbing the boy’s ass. Zenitsu couldn’t know about it. 

They saw a couple people as they walked out to the hallway, most of which being groups of women off to a yoga class, or the built men who came daily as a routine. Tanjiro recognized a couple of them, he liked to keep a careful observation of those around him. He knew Zenitsu’s type, and luckily no one they’ve seen so far fit the match. 

He hustled Zenitsu, yet still trying to be sneaky about his urgency. His boner was about to rip through his pants or combust if he had to watch Zenitsu’s ass squatting for one more second. He did this to himself. He was the one who made Zenitsu wear those tights. But god, it was so worth it. 

It wasn’t long before the bathroom was right in their eyes, a family bathroom. One giant stall with a lock. 

“You can go first. I’ll wait outside.”

Zenitsu cracked his neck, exhaling a deep sigh while walking over to a nearby bench. His phone was already secure in his hands, opening some online book app that Tanjiro saw him on often. 

“Nono, you go first.”

“Tanjiro I don’t really need to go—“

“Let’s just go in together!”

”Huh? What—“

Tanjiro giddily snatched Zenitsu’s hand, dragging him over to the bathroom and pushing its door open. All the complaints filling Tanjiro’s ears were blocked out, the grip on his blonde’s arm too tight for any resistance. He felt thrashing, but he pleasantly led Zenitsu inside, closing the door behind him and locking it. He didn’t need any disturbances.

“Tanjiro? What are you doing?”

Zenitsu’s eyebrows knitted, under all his sweat, he smelled nervous. Yet, there wasn’t a whiff of distrust radiating off him. What had it been — 15 years they’ve known been best friends? Hell, Tanjiro shaves Zenitsu’s legs for him, carries him to bed, and washes him on the occasion. Zenitsu trusts him with everything.

“oh.. wait do you have a surprise for me! Awww.. Tanjiro!!” 

The blonde’s eyes lit up, his pupils practically turning to stars. Tanjiro was notorious for randomly spoiling him with mountains of sweets, trinkets, practically anything he saw on shopping trips. All the money he’s spent on Zenitsu was so worth it. Each reaction, thank you, and hug of gratitude made Tanjiro’s heart melt to pools.

Ah. Sweet Zenitsu.

Precious Zenitsu. 

He wasn’t exactly.. wrong about Tanjiro having a surprise for him. 

“Tanjiro—“

The boy turned, about to scold Tanjiro for his lack of relply.. but his words were cut short. Can you blame him? It’s hard to speak when your head gets suddenly pressed against a tiled wall —  hips lifted up by strong, calloused hands pressing you up against a clothed crotch. 

“T-Tanjiro? What are you doing —!”

Oh. Zenitsu knew what Tanjiro was doing. He felt what Tanjiro was doing. He wasn’t oblivious to the prominent bulge pressing right up against his ass, rubbing against it shamelessly. It was big. Did Tanjiro have a boner?? How hard of a boner did he have?! Why did he have a boner?! WHY WAS TANJIRO RUBBING A BONER ON HIM??

Grunted moans started to invade Zenitsu’s ears, his roommate’s moans. His best friend’s moans. What was happening?! 

”Tanjiro! K-knock that off! Where did this even—“

a hand reached over to jam two fingers into Zenitsu’s mouth, slipping in easily and pressing onto his tongue. It shut him up fast — a whine leaving his lips at the invasion. Strangely, Zenitsu didn’t think of biting down. 

The other hand went to his bare chest, trailing up his abs and stopping at his nipples. The padded thumb brushed over the bud, pinching between his thumb and index finger and rubbing it softly. The fingers were already spit covered — a clear purposeful preparation. 

Zenitsu gasped, his mouth closing on the fingers to swallow any noises that threatened to spill out. Did Tanjiro know where Zenitsu was sensitive?! Why the hell did he know that?! 
Shit — did Zenitsu tell him??

“Ah..”

He could feel his hips getting pushed closer to the wall, Tanjiro closing in on him. The erection poked through Tanjiro’s pants and went far between Zenitsu’s legs. The redhead thrusted forwards.. moving his fingers in and out of the boy’s mouth, His thumb delicately fondling Zenitsu’s left nipple. It was too much — too much! He was still trying to process the dick rutting against his ass! Now he has to deal with a  hefty amount of fingers invading his mouth, and pleasing his chest?! What the hell?!

Zenitsu’s hearing gave up on him, a loud ringing starting to replace the sounds of the machinery in other rooms. Did it block out the sound of Tanjiro’s grunts? No! No it didn’t! Of course it didn’t! 

“Mmnn..”

Zenitsu shuddered, his body twitching at the feeling of a tongue trailing its way up the back of his neck. A hot, wet tongue. It went right for his ear, lightly placing its lips around the skin and planting pretty little kisses. 

“Tanjiro..”

he breathed out. His acts of protests going weaker as the dick poking between his legs started to reach further—rubbing up against the cloth covering his own

God. It felt good.

Tanjiro seemed to think so too, his heart rate accelerating as he seemed to thrust at a quicker pace. More groans poured out, tickling Zenitsu’s eardrums in a way that he almost liked. The blonde was fully aware on the difference between their masculinity. He admired Tanjiro’s body, his deeper voice and high drive to be helpful. Zenitsu’d be lying if he claimed he’d never had a dirty thought — but it was always minor! He never imagined this!  

“Zenitsu..”

Tanjiro took his fingers out of the blonde’s mouth, a load of drool coming with them. It dripped onto the floor, making a small little puddle underneath their bodies. Tanjiro sounded pleased at that.

He moved both his hands to the boy’s hips, yanking him away from the wall and instead —  up against Tanjiro’s body. Up against his dick. They manuvered towards the floor, Tanjiro leaning up against the wall with his legs spread, holding Zenitsu securely on his lap.

The younger boy pulled Zenitsu close as best as he could, no room for any form of resistance. Tanjiro smirked, leaning over to whisper in his lovely Zenitsu’s ear. 

“Shh..”

It gave Zenitsu chills, a hard swallow going down his throat. Were they really gonna do this?! 

yea. They were gonna do this. Tanjiro’s hands were already trailing under the boy’s leggings, smoothly slipping them off. Ah— shit. Zenitsu was helping wasn’t he?? He kicked off the pants once they got down to his ankles, using his foot to nudge it out of the way. 
Did he want this?

With only his boxers keeping his modesty, Zenitsu squirmed. Was he suppose to just sit and take it? Beg for it? Fight against it?He was inexperienced! He wasn’t exactly a virgin, but all of that was in high school! He’s in his early twenty’s now!

Tanjiro completely ignored the squirms, his fingers tugging at the hem of Zenitsu’s undergarment, pulling it down just enough so Zenitsu’s half-hard dick could place into Tanjiro’s palm.

God — fuck did he just wanna cum right then. 

The callouses on Tanjiro’s hands.. and oh, the roughness of his skin brought a feeling Zenitsu’s own hands were never able to achieve. The blonde had multiple sets of lotions to use for different parts of his skin, keeping it soft and smooth to the touch. He assumed it was best, that girls would be more fond of a guy with smooth skin — but oh, he’s gonna go home and throw all of those in the trash.

Tanjiro began to stroke him, his hand wrapped around Zenitsu’s dick, slowly going in an up and down motion that was just how Zenitsu liked it. The other hand — still covered in saliva from before — went back to fondling Zenitsu’s nubs, rubbing them between his thumb and index finger with an occasional flick. Zenitsu had already learned to love when Tanjiro flicked  it. A fast learner.

From the stimulation, especially the pulses to his dick, Zenitsu couldn’t fight back a moan. It ripped from his gut, drawn out and muffled. His body shivered from the new sensations, eyes jamming shut to try to calm down. He dug himself into Tanjiro’s lap, unintentionally grinding his ass onto Tanjiro’s very much still prominent bulge. It sent a shock of pleasure up Zenitsu’s spine.

“A-ah.. Tanji..”

His breath stifled, mouth hanging open with a string of drool already making its way down his chin. Nobody ever told him it felt different for someone else to do it. Not only did Tanjiro have more efficient hands, but — maybe it was the fact it was Tanjiro jerking him off in the gym bathrooms that added the needed kick.  

So. Here was was. In a gym bathroom floor, sitting on his best friends lap, hands in his boxers giving him a handjob!

Worst part is, Zenitsu was actually liking it! He was almost getting bored with how slow Tanjiro was starting out! He’s well aware Tanjiro can go faster than this, way faster! Was he being teased?? Shit shit shit shit shit! Was he expected to ask?! No! That’s way too embarrassing! Their roommates! Childhood best friends! They shouldn’t even be doing this!

but — fuck. Zenitsu wants this.

”Tanjiro..”

he whined, his lips pouted out as he tried his best to look back at the redhead. 

“Please..”

Wow. Two words and he already felt Tanjiro getting harder. Nasty pervert.

”Please?”

Tanjiro’s voice was a chuckle, his hand leaving Zenitsu’s spit covered chest to place on his chin, caressing it gently. He then slowly guided the blonde’s face to look back at him, their eyes instantly locking on each other. Zenitsu felt weak. Tanjiro’s gaze was nothing like he’s seen it before. Lustful, desirous, greedy.. 

“Of course, anything for my precious Zenitsu.”

Tanjiro lifted a smile, his lips reaching a soft kiss on the back of Zenitsu’s neck, giving a subtle suck to the skin before pulling back. Soon after, Zenitsu started to feel.. movement. Not faster movement like he had asked for — but his boxers started to come off. Completely.

”W-wait! Tanjiro!”

his plea was ignored, the boxers being tossed idly to the side while Tanjiro worked on taking off his own. His hand stay latched around Zenitsu’s waist, preventing his retreat with a grip hard enough to bruise.

The movement stopped once Zenitsu saw Tanjiro’s boxers getting tossed— but..  he felt himself start to get lifted up! Shit! He wasn’t ready for this!! He’s seen Tanjiro naked before, he may look soft and kind.. but his dick is huge!

”Tanjiro! I’m not— we can’t just— a-ah…”

Zenitsu felt something cold and slimy press against his hole, two fingers reaching in to start spreading him wet. They scissored the opening, thrusting in and out just like they did with his mouth. 

“Mm..”

Zenitsu panted, a small whimper falling off his tongue as the fingers start to go deeper, curling themselves upwards and hitting a spot that made Zenitsu moan. Shit. That was way too loud. Someone was gonna hear that! Why isn’t Tanjiro nervous? Does he wanna get caught??!

His suspicions were confirmed instantly as Tanjiro started to abuse the spot, poking his fingers up into it and snickering when Zenitsu squirmed in his lap. 

“Shh.. it’s just lubricant.”

The redhead whispered, his voice low and seductive. It hissed in the blonde’s ear, yet it was also very.. gentle. Tanjiro was always gentle with him. Zenitsu loved that. He loved when Tanjiro would just snuggle with him on the couch.. or treat him like an absolute prince just for the hell of it. It was a form of feeling loved that Zenitsu had grown accustomed to. 

but oh— that gentle attitude disappeared in seconds when the fingers abruptly left, and a fat head pressed its way against Zenitsu.

The hand on Zenitsu’s dick started to pump it at a significant increase, rubbing the slit with a padded thumb as something started to intrude on Zenitsu’s body.

It wasn’t gonna fit! No way it was gonna fit!

Yet even with the clear difference in size, Tanjiro sounded confident. He was gonna do it. 
“It’s okay Zeni.. the lube will help.”

“Still! It’s not gonna—“

”Shh.. just wait a minute.. and you’ll feel amazing..”

Tanjiro planted a kiss to Zenitsu’s temple, lingering there for a moment before moving both of his hands over to Zenitsu’s hips, keeping them raised above the redhead’s cock. 

Zenitsu swallowed his worry, taking a deep exhale before clamming his eyes shut. That was suppose to prepare him? Right? What was he suppose to do?? His dick was now just laying hard on his lap, should he jerk off? No! Too embarrassing!

”Hgn!

Zenitsu pressed a hand over his mouth, his body starting to tremble as something made its way in. His ass hurt like hell! Painful! Agh! But — no! He needed to trust Tanjiro! 

Zenitsu never felt.. full like this before. Sure— he had tried to finger himself a couple of time, but he always got bored.. and just skipped right to jerking himself off. Now, he had a dick probably already halfway into his asshole, and tearing his body apart! 

“Tanjiro it—“

”I know I know.. don’t worry.. you’ll feel good.. I promise…”

he wasn’t lying, and god — did that soothing voice want to make Zenitsu start wailing. He was so — conflicted on this. Tanjiro just randomly shoved him into a bathroom and started to — yknow! But— he’s sweet.. he’s making sure Zenitsu’s okay. 
So, Zenitsu decides this is good. Even if it feels like his ass is about to tear open. 

“Almost in..”

”Tanjiro—“

Zenitsu bit his tongue, breathing heavily as to fight himself back from making any more noise. He’d already let a couple moans slip by — he had to be quiet if they didn’t want to get kicked out. 

His body trembled, sucking in breaths every couple of seconds before he felt himself fully reach Tanjiro’s body. Did he do it? 

“Is—“

”It’s all in. Good job Zenitsu..”

The blonde’s face flushed crimson at the subtle praise. Tanjiro was so good to him. Yes — he should be proud of himself! Tanjiro had a bigger dick than average, and Zenitsu was able to take it without much preparation! 

Ah!

With a swift movement, he was practically thrown off Tanjiro’s lap with his head now on the floor, his ass in the air. Tanjiro mounted above him, hands squeezing his ass and feeling it graciously. 

“Mm.. did I ever tell you how much I love this part of you, Zenitsu?”

Tanjiro gave it a small spank, before cutting off whatever reply Zenitsu had to muster. He slowly pulled himself out — before thrusting right back in, filling Zenitsu completely. 

“A-agh!”

Zenitsu’s body twitched, his hands desperately reaching to grab something for stability. A desperate whine eased its way out between his sealed lips, his body teasing Tanjiro into getting more rough. 

His slow thrusts were already enough to have Zenitsu finishing with tears pooling down his face — but he knew Tanjiro. Tanjiro was thoughtful, kind, considerate.. but when he wanted something, he worked for it. He took it.

“Mngh.. ah.. you’re so tight—“

Zenitsu started to become really fond of the younger boy’s grunts. They were gruffy, deep, full of lust and pleasure. His dick twitched between his legs, hard and heavy — yet still reactive to the subtle turn-ons that Tanjiro had for him. 

Tanjiro rubbed Zenitsu’s ass, squeezing it in his hands while progressively quickening his pace. Zenitsu could feel the cock pressing against his walls, rubbing against parts of him that caused his body to spasm. Breaths came uneven from his lips, gasps for air to keep him going when he started forgetting to breathe. 

“T-Tanjiro..”

he mustered out, his voice sounded completely whiny and needy. Tanjiro liked that, his heart rate accelerated, his blood pumping and his cock twitching being factors to confirm that to the blonde. 

“Ah..ah..”

Another whimper ripped from him, drool starting to pool out of his mouth into the floor. Zenitsu didn’t have any more care for how unsanitary it was to be laying on a public bathroom floor — but Tanjiro would clean him later if he asked. He was sweet like that. 

“Zenitsu..”

The boy panted, his right hand reaching down to grab Zenitsu’s neglected dick. He pumped it, matching the pace of his thrusts — that had increased without Zenitsu realizing. 

Loud slapping sounds assaulted Zenitsu’s ears, the stuff you would hear in a porno when the guy finally had enough of his stepsister. It echoed throughout the room, bringing Zenitsu’s sense of what was happening down to a puddle. Part of him wanted to just.. lay there and take it. Tanjiro knew what he was doing, right? He’d make sure Zenitsu was cared for, feeling goofy, and happy. 

And god. He was happy. 

“Mm.. ah..hehe..mm..”

s smile curved onto his wet lips, a giggle leaving his chest with a loud smack to his ass to accompany the lovely sounds. The cock in him only got deeper with each thrust — Zenitsu couldn’t see, but he hoped it was buldging through his stomach. Maybe next time they should do this in a different position.. 

Wait — next time?

”A-ah! Mm..ngh!”

Zenitsu let go of a gasp, feeling Tanjiro sudddnly grip his thighs hard and start to plow into him mercilessly. Fuck.. fuck fuck fuck! That felt amazing!

”ah.. k-keep going..”

He blubbered his words, his eyes rolling back into his head with a drawn out whine. Tanjiro did just as he asked, slamming into him with a thrust that reached something in him. His walls closed around Tanjiro’s dick, body twitching with pleasure at whatever the hell Tanjiro just did. 

“Mm.. are you feeling good, Zenitsu?”

he replied with a moan. Yes. Yes he was. He was loving the strokes on his dick, just how he liked it and how he did it to himself at home. Did Tanjiro listen in one him? Whatever. He didn’t give a care in the world about that right now. He was only focused on the rampant thrusts pounding into his ass.

”More.. ah.. more.. it.. it feels so good..”

Oh what a lucky bitch Tanjiro was, getting pleas and begs without even having to ask. He better buy something sweet for Zenitsu later — to thank him for being so good and compliant. Zenitsu felt like melting into mush, his dick dripping with precum and his eyes tearing up from just how damn good it felt. 

Slap. Slap. Slap. Slap. Slap

Beautiful sounds. Sounds that would be stuck in Zenitsu’s heads for weeks.

The thrusts started to get desperate— faster.. faster.. rougher

Tanjiro’s groans pierced into his ears lovingly, his strokes getting quicker and ready to pump cum right out of Zenitsu’s dick. 

He welcome it. Wanted it. Ah — he needed it. 

“Ah.. please T-Tanjiro!”

Zenitsu cried out, feeling it get more and more and better before he felt cum start to fill its way into him, and out onto the floor. 

There was gonna be a cleanup.

Notes:

Live laugh preach perverted tanjiro