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Joined heartbeat

Summary:

“You won’t fall. I’m not going to drop you.”
//

 

Or the one where Zenitsu and Tengen have sex over their balcony.

Notes:

there are some parts that seem like dubcon but these two are engaged, and tengen knows zenitsus limits more than anybody else, which is why he pushes forward and sometimes “ignores” them. there is established consent between them both throughout the entire oneshot despite some dialogue choices

also i wrote this after being given the prompt “near death experience” lmfao so

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

Work Text:

“It’s embarrassing. I’m not doing it.”



That’s what Zenitsu had said. Yet, here he was. Barefoot on the balcony of their shared home. Being involved in Uzui’s antics was nothing new to Zenitsu; he signed away his rights to being free of Uzui’s stunts once he agreed to marry him two years ago.

 

How he had managed to let Uzui convince him into having sex above the city of Tokyo was an entirely new question though. Uzui had a habit of asking for absurd things involving their sex life– he had always been one to ‘flamboyantly spice things up ’. But all of their immoral acts were done inside the comfort of their walls, it was never… Outside. Like this.

 

It felt as if the city had eyes on him. 

 

As if everybody below knew what was going on, that every window with its curtains drawn open was staring at him.



“This is stupid.” Zenitsu complained, probably for the thirtieth time in the last fifteen minutes. The night was neither cold nor warm, but the occasional breeze still bit away at the skin on his shoulders and chest. 

 

Uzui paid it no mind, opting to instead gently grab hold of Zenitsu’s waist and feel up his sides. No matter how many times he saw Zenitsu naked, it was just as good as the first. His fingertips danced over the thin stomach and prominent ribs of his fiancé, cherishing the smaller body in front of him as if he hadn’t already ingrained the feel and sight of Zenitsu into his mind.

 

Finding no response, Zenitsu continued, “And it’s dumb.”

“I know. Very dumb and very stupid. I’m terribly sorry you have to put up with it.” Uzui hummed, although the hard cock poking Zenitsu’s back showed anything but an apology. 

 

Before Zenitsu could continue his quiet pity party, Uzui grabbed a firm hold of his hips. It was a sight he always admired: his hands so large that they slotted into the small hip dips of his lover so easily, like two matching jigsaw pieces. His hands almost wrapped around him completely, and if Uzui tried a little harder, opposing fingers would brush together against the skin of Zenitsu’s lower abdomen. 

 

They had only moved outside after- much to Uzui’s dismay- Zenitsu had been prepared inside on their couch. Zenitsu was doing this for him, so the very least Uzui could do was lay him down comfortably between plush pillows and stretch him out on four fingers. You’d think that maybe after years of constant fucking, due to both parties having such high libidos, Zenitsu’s body would’ve become somewhat more accustomed to Uzui’s cock by now. But it’s almost like he tightened up even more every time Uzui pulled out.

 

Uzui pulled Zenitsu’s body up a little, until the boy was on his tiptoes, and crouched ever so slightly. He was being quickly reminded of why they only ever had sex while laying down– the height difference. Zenitsu had barely grown an inch compared to when they first met and still, his shoulder practically bumped Uzui’s crotch whenever they hugged. His face was exactly at Uzui’s stomach, which was more than helpful for when Uzui wanted a blowjob, but it was also incredibly inconvenient for times like now. 

 

Still, it’s not as if he could force himself to be any shorter or force Zenitsu to be any taller.

 

Letting go of Zenitsu for a moment, he wrapped his hand around the base of his cock and nudged the cockhead against Zenitsu’s wet hole before sliding home. Home. Uzui would live here if he could, deep in Zenitsu’s body like this. He wanted to crush the two of their bodies together until there was nothing left, merge their souls into one big mess, squish their cells until they integrated. 

 

Zenitsu moaned weakly at the familiar feeling of Tengen entering him and fuck, he felt full. His stomach and ass already began to hurt at the strain that was his lover, the stupidly handsome intruder that was attacking and prodding at his insides. Zenitsu breathed deeply to ground himself, wrapping his hands around the rounded railing that surrounded the balcony until his knuckles turned white. 

 

He blinked away a few tears, hanging his head over the railing as he stumbled slightly. It was hard to keep balance while being fucked on his tiptoes, really. He stared down, finding it a little hard to concentrate on how many people were below them with Tengen’s hot breath on his neck and the cock inside him. They faded into a blurry mess of coloured spots when Tengen’s grip on his waist tightened and he back to rock in and out of him.

 

“You’re such a pr- iiick ..!” Zenitsu threw one last insult into the air as Uzui began to fuck into him. He pistoned in and out, wasting no time to pick up the pace. Fucking Zenitsu would drive him insane, Uzui was sure of it. It was like heaven on Earth and he could never get enough of it, no matter what. 

 

Zenitsu was a drug he could never get tired of, an addiction he never wanted to give up. It was good, all too good. It made Uzui’s head spin as his fingers dug into Zenitsu’s plush skin, his cock pulsing inside his warmth. 

 

The familiar scent of sex and sweat began to emit from the two of them, but it was a scent that was very much welcomed. Zenitsu let out little moans and whimpers as Uzui’s cock pounded him, practically punching the little noises out of Zenitsu. 

 

“Feels good.” Uzui groaned lowly into Zenitsu’s ear, awkwardly bending down so he could nip at his shoulder. Zenitsu mewled beautifully in response, always so vocal and pretty. His head tilted back to bump gently against Uzui’s, his soles beginning to strain from being kept on his toes. 

 

Uzui’s grip tightened and he lifted Zenitsu ever so slightly off the ground, pushing him against the railing until his cock was trapped between the glass and his own stomach. Zenitsu gasped and delivered a kick to Uzui’s thigh, trying to lean back the best he could. 

 

Angry, Zenitsu huffed. “Put me down! I’m— I’m serious !” 

 

Both men’s hearing was extra sensitive, so both of them picked up on Zenitsu’s heart rate quickening at the same time. 

 

“I can’t fuck you like this, you’re fumbling around like some ditzy bitch who can’t balance properly.” Uzui complained. His hips had stopped moving, but he remained buried to the hilt inside Zenitsu, his balls snug against the little blond.

 

Zenitsu blushed heavily, swinging his legs idly as he continued to grip the railing. “Well, I told you this was a bad idea! It’s not my fault you’re so freakishly fucking tall.”

 

“No, you’re just tiny.” Uzui rolled his eyes, seemingly over Zenitsu’s constant yapping. He stepped closer to the railing and forced Zenitsu over the rounded bar entirely. The blond’s upper body was folded over, his bare chest rubbing against the glass panes. His eyes were forced to meet the road below, the busy people and the queued lanes of cars. 



Tengen!! —“



Zenitsu could hardly scream out an insult or a demand before Uzui’s grip increased and he began rutting against like him an animal. Zenitsu’s palms pressed against the glass, desperately trying to push, to get himself back up.

 

“Te—Tengen, pull me back up, I’m serious this time! You’re gonna fucking drop me and I’m going to die!” Zenitsu sobbed, tears flowing freely from his eyes now. Maybe they’d hit the people below, if he angled his head right.

 

Uzui grunted a quiet curse under his breath, his fingers pressing further into Zenitsu’s hips until barely visible droplets of blood appeared. 

 

Hot puffs of breath condensed in the air, small smoke clouds dissipating quickly as Uzui let out heavy breaths. “You won’t fall. I’m not going to drop you.” His voice was uneven, rough, wolfish. 

 

Zenitsu struggled to speak, feeling blood rush to his head as he sobbed and pushed at the glass again. It was impossible to move back up, not with Uzui’s weight crushing him against the banister. Words failed him, as nothing but moans and cries could escape from his throat.

 

Abruptly, warmth flooded through him. Uzui’s hips stuttered, his cock pulsing as he began to pump into Zenitsu steadily. 

 

After the initial euphoria, Uzui was met with a sight he knew all too well. He lifted Zenitsu’s upper body up, moving his now steadily softening cock out from Zenitsu’s fucked body. Thick cum flowed down the smaller man’s thighs, mixed with small amounts of blood. 

 

“… Shit.” Uzui murmured with a slight grin, looking over the trembling Zenitsu.

 

“What?” Zenitsu lifted his head quickly, looking over his shoulder and up, meeting his gaze.

 

Uzui was quiet again as he pulled Zenitsu back, until Zenitsu was firmly against his chest. “Nothing. You’re just so hot, it’s crazy. I’m just wondering how I landed you.”

 

Very near to giving in, Zenitsu huffed and turned his face away. “I’m not going to be distracted with flattery after the shit you just pulled! What the fuck were you thinking!?” 

 

Another low laugh escaped Uzui’s throat. “Worth a shot, huh? Right, let me take care of you now.”

 

Zenitsu was about to protest again but couldn’t react in time as Uzui’s hand snuck between his legs and grabbed at his leaking cock. It was a little difficult to get a firm hold when Zenitsu wouldn’t stop wiggling around, but Uzui managed to keep him still long enough.

 

Quick, firm strokes began and Zenitsu let out little mewls at the sensation. He began to melt in Uzui’s hands, sinking into him like putty as he was touched. 

 

Uzui had always had a thing for touching over Zenitsu at whatever chance he got, so even though one hand was distracted with stroking Zenitsu’s cock, the other was just as preoccupied with feeling . His other hand felt over the skin of Zenitsu’s stomach, his chest, his bruised hips, his slim sides and slender neck. He leaned down to press kisses over his faintly freckled shoulders, his smile remaining as he listened to Zenitsu’s weakly concealed whines and moans. 

 

Zenitsu couldn’t hold himself up as his stomach began to knot and flip, sinking further into his large fiancé. Both of them had had sensitive hearing for as long as they could remember, so it was usual for them both to fall silent sometimes during sex merely just to hear each other. Muffled groans, soft whines, drawn out mewls, all of it. Zenitsu felt the fall and rise of Uzui’s chest, listening closely to the thumping of their joined heartbeat. 

 

The boy’s head tilted backwards, feeling droplets of sweat trickle down his neck and temple. Whether it was his own or Uzui’s, it didn’t matter. 

 

Not another minute later, Zenitsu was wriggling again as he felt himself be pulled towards ecstasy. His mind went blank as his orgasm finally came to a breaking point, shooting out of his body in long spurts. A sticky mess drenched Uzui’s hand, some of the balcony floor, and Zenitsu’s stomach.

 

Zenitsu’s whole body felt like jelly and when Uzui tried to talk to him, it felt too far away. His whole body hurt as he tried to ground himself, yet wasn’t able to. He couldn’t control his breathing, couldn’t stop himself from slipping away as more tears threatened to spill.



When Zenitsu blinked, he was now tucked safely in an array of blankets on the sofa. His body felt a little cold instead. When had he fallen asleep? Or more accurately, passed out?

 

Golden eyes peered up to find the TV on, playing garbage shows at a low volume. The lamp was on, which Zenitsu was internally thankful for. Just the idea of the big light on was already hurting his eyes.

 

His eyes and head felt sore and when he reached up to touch his face, he found the remains of old tears on his cheeks. Zenitsu willed his body to sit up but just as he did so, Uzui came into view.

 

“Hey, hey- Lie down again. Don’t sit up.” Uzui warned as he set down two cups on their coffee table. 

 

Zenitsu pouted, not listening as he fully sat up. He wrapped his blankets around him a little tighter before reaching out a shaky hand to grab hold of the handle of his favourite mug. Tea, two sugars. Just the way Zenitsu liked it.

 

“I’m not a baby…” Zenitsu muttered, staring down at his own reflection in his drink. He felt a little embarrassed when Uzui’s gaze didn’t move away from him, seemingly making sure that Zenitsu really was alright. Then, after a small clearing of his throat, Zenitsu continued: “Thank you, by the way. I didn’t mean to pass out.”

 

Uzui hummed softly as he sat next to Zenitsu, his arm immediately wrapping around the smaller boy, almost as if on instinct. “Nobody means to pass out, Zen. This isn’t the first time and it won’t be the last. Guess it just comes with having to take a giant cock all the time.”

 

Immediately, Zenitsu scoffed and rolled his eyes. Despite it all, he snuggled into the warmth of Uzui’s shoulder and chest. “Shut up.”

 

There was a comfortable beat of silence as the two of them once again basked in the nostalgic familiarity of their joined heartbeats. 

 

As always however, that peaceful silence didn’t last long, as Uzui spoke up again in a hushed tone, “Are you okay?”

 

Zenitsu smiled a little and nodded, his fingers still clutching the warmth of the mug. “Yeah.”

 

“Good, good… So when do you want to fuck in real public?” Uzui teased, not serious. Zenitsu responded with a disgusted scrunch of his nose and a light swat to Uzui’s chest, which only caused Uzui to erupt with laughter. 

Notes:

kind of rushed towards the end but it’s because i was unsure of where i was supposed to end it tbh
i just wanted to get this out so it stops rotting in my docs