Work Text:
“I think we finally did it.”
San snapped his head towards Yunho, eyes wide.
“Are you sure? Because we’ve said that before—”
“Look at the results,” Yunho interrupted, not moving his eyes away from his computer screen.
San pushed away from his desk, rolling in his chair over to Yunho’s station. He glanced at the screen quickly before grabbing Yunho’s arm.
“Yunho…” he breathed, not quite ready to believe the data.
“We did it…Sannie, we did it!” Yunho jumped out of his chair, running to the printer to gather the data printouts.
San looked at the computer again. They had really done it.
They had made a sexual enhancement drug that had no side effects.
Well, according to the data, at least. It still had yet to be tested. There would be a clinical trial, of course, and some would get placebos and some would get the real drug, but San was confident. It would work. And it would be the best damn enhancement drug on the market.
Yunho came back and thrust the papers down on the desk, right in front of San. He tapped a line of numbers before clearing his throat.
“San, look. Look,” he said fervently. San looked.
Wow.
It was there, in black and white and mathematics. They might not mean anything to anyone except Yunho and San, but the results were there, clear as day.
“We did it.”
San looked up at Yunho, eyes filling with tears of happiness as it seemed their long hours in the lab for two years straight had finally paid off.
“Yunho…we—we did it!” San exclaimed, jumping up and throwing his arms around the taller man’s shoulders, practically sobbing with relief. He felt more than heard Yunho chuckle and hugged him harder. Yunho’s large hands slid up his back and pulled him tight before releasing him.
“I couldn’t have done it without you, Sannie,” Yunho said, staring into San’s eyes. San looked back, seeing the triumph and sincerity he felt mirrored back.
“We did it together,” San choked out. He was so happy they had actually achieved what they set out to do. Yunho nodded once before clapping his hands.
“Now all we have to do is test it.”
What?
“What?” San asked, incredibly confused.
“We need to test it,” Yunho said, making his way over to their samples. San just stared at his retreating back. He didn’t say a word until Yunho came back with two vials of the drug they had just created.
“What do you mean we need to test it?” San asked, moving his finger between Yunho and himself. “That’s what test groups are for. All we had to do was make the thing, not do a clinical trial on ourselves.”
Yunho thrust a test tube into San’s hand and San grabbed it automatically, not wanting it to drop.
“Don’t you want to see if it works?” Yunho asked San, wagging his eyebrows. San let out a huff and rolled his eyes. Yunho wasn’t wrong, of course. San was certainly intrigued. He had spent the better part of two years trying to make a drug that would let people have better sex. Who wouldn’t want to test it out?
“C’mon, please? I don’t want to take it alone,” Yunho whined, pleading at San with puppy dog eyes. San always fell for the puppy dog eyes.
“Okay, fine. We can test it,” San said reluctantly. Yunho let out a silent cheer and chugged down the contents of his test tube. He looked over at San excitedly and San sighed, eyeing the small glass vial he was holding more closely.
It contained a purple liquid, vibrant and enticing. It was cool to the touch because they had to make it in 4°C or it wouldn’t be viable. San thumbed the rim before lifting it to his lips. He made eye contact with Yunho before tipping the violet concoction into his mouth.
It tasted like nothing at first, and then he got a hint of something when he swallowed again. He closed his eyes, trying to figure out the exact flavour when he heard a loud thump. He opened his eyes immediately, locating the source of the noise. Yunho was face down on the ground.
“Yunho?” San cried, falling to his knees to shake the other scientist. He got as far as putting a hand on the man’s shoulder, barely able to turn him over before he passed out.
///
When San awoke, he was lying on something soft. He blinked slowly and rubbed his eyes, not particularly concerned with where he was because he was tired and comfortable. Except…
Except.
He felt strange. Different, in a way he couldn’t explain. He was trying to figure out what it was when someone cleared their throat, startling him.
“Yunho!” San sat up abruptly, realising he was in their tiny break room that connected to the lab. He was lying on the sofa they had demanded be added so they could take naps while waiting for experiments to be finished. It took a while for all the data to be collected so they would take turns napping on the couch while the other stayed up to run the experiment, hoping to find a positive result. They never did, until…
Suddenly, it all came back to him. The triumph of finishing, Yunho suggesting they test it, drinking the brightly coloured liquid…
He remembered passing out on top of Yunho in the lab, though.
Did Yunho carry him here?
“Are you okay? You just passed out,” San asked, concerned. He went to stand but still felt a bit off so he stayed sitting on the plush cushions. Yunho held up his hands in a gesture for San to stay where he was.
“I’m…okay? I think?” Yunho said, fidgeting with his lab coat. San noticed he had it pulled around him tightly and was confused because it wasn’t as cold in the break room the way it usually was.
“Are you sure?” San asked, raking a hand through his hair and taking a deep breath. He still didn’t know why he felt different and was too disoriented to figure it out. He was , however, uncomfortably hot and felt on edge for some reason. He shrugged his lab coat off and rolled up the sleeves of his button-up.
Yunho made a noise that sounded like a groan and San looked up at him, an eyebrow raised.
“I…” Yunho trailed off, uncomfortably shifting on the chair he was sitting on and rearranging his lab coat again.
“You know you can take your coat off, right? It’s super hot in here today. Do you think they turned the air conditioning off? Wait, that’s dumb, they would never do that we need the samples to stay viable,” San was mumbling to himself towards the end and fanning himself with a hand, and he failed to notice Yunho staring at him intensely.
“It’s not the AC,” Yunho grit out. San looked at him again and saw that his face was slightly pink.
“Okay, Yunho, seriously just take your coat off, you look uncomfortable,” San said, a bit worried.
“I am uncomfortable, Sannie,” Yunho hissed.
“Okay, so what’s the problem? Just take it—” San gasped as Yunho stood up and the lab coat fell open. There was no way San was seeing what he thought he was seeing.
“What the fuck.”
“I know.”
“It’s huge!”
“I know.”
“How is it so big?!”
“The drug.”
Of course. How could San forget what they did for a living? The whole reason why they were there, working day after day with little sleep and shitty coffee?
The drug.
Their goal was to create an enhancement drug that users could take right before having sex that would make them more turned on, more sensitive, and more excited. It was supposed to make penises bigger and harder, vaginas plumper and wetter, and minimize refractory periods after orgasms for everyone. Users of the experimental drug would also experience enhanced stamina and pleasure.
And clearly, it fucking worked. Because Yunho was going to practically tear apart his pants with the size of his erection.
“Oh my god, Yunho. Take that thing out of your pants before you strangle it with your boxers,” San said, concerned for his coworker.
Yunho’s cheeks got pink with embarrassment and he moved to cover his hard dick that was tenting his pants, trying to shield it behind his large hands.
“There’s no need to be embarrassed, Yunho. Clearly, it’s not the size that’s the issue,” San snorted, crossing one leg over the other while he draped an arm over the back of the couch.
And that’s when he felt it.
Or rather, he didn’t feel it.
His dick was gone.
He looked down, expecting to see the bulge that was usually there. Nothing.
The only thing he could focus on was the dull throbbing between his legs. And if that meant what he thought it did…
San slowly unbuttoned and unzipped his pants, raising the waistband of his boxer briefs to confirm what he already thought.
He had a pussy.
“I have a pussy,” he said quietly, still staring at the vee of smooth skin that was now there instead of his cock.
“What?” He distantly heard Yunho say, not quite paying attention to his coworker as he was still fascinated by what was between his legs. Eventually, he looked up when he heard Yunho go quiet.
“I have a pussy.”
“That’s not possible,” Yunho said, his scientist face back on. San thought it was cute.
“And yet, my dick is gone and I have a pussy between my legs, Yunho,” San said with a smirk, weirdly calm about the whole thing.
“That’s not possible,” Yunho said again, going over to San to see for himself. San stood up and let his pants fall to his thighs, pushing down his underwear, as well, so Yunho could see.
Yunho’s eyes bulged out of his head and San would have laughed if Yunho hadn’t touched him at that exact moment. He brought his hand up to San’s mound and gently stroked it, a finger slipping into San’s folds and moving around the arousal that had been pooling there since he had woken up on the couch. When Yunho took his hand away, he brushed San’s clit and that sent San over the edge.
“Yunho!” San shouted, his body convulsing as he had—what he assumed—was his first orgasm with his new anatomy. He clutched Yunho’s biceps and hunched over slightly, resting his head on the taller man’s chest. Yunho was wearing a sweater and San noted that it was soft against his cheek as he rode out the pleasure coursing through his body.
When he finished coming, he stood upright weakly, still holding onto Yunho’s arms.
“That was…wow. That was so intense, Yunnie,” San said, his eyes sparkling with amazement and lust.
“Did you just have an orgasm?” Yunho said, face slightly red and eyes glazed over.
“I think so? It’s kind of hard to tell with this equipment,” San said shakily, letting out a breathy chuckle.
Yunho’s hands came up to grip San’s waist. He squeezed tightly while San caught his breath against Yunho’s chest.
“Okay, I think I’m good now,” San said, pulling away. Yunho still held onto him, looking down to see the glaring difference between them.
“I think I need to examine it.”
What?
“What?”
“I need to examine it. To see how similar or different it is to other vaginas.”
“How many pussies have you seen?” San scoffed. Yunho blushed and San raised an eyebrow.
“That’s not the point. Let’s go back to the lab so I can get a proper look,” Yunho said, removing his hands from San’s waist so San could fully take off his pants and underwear. Yunho had already removed his shoes when he laid him on the couch, and San knew it was because Yunho didn’t like shoes on furniture.
San tossed his clothes on the couch and Yunho grabbed his hand, leading him to his workbench.
Yunho moved some papers to the side, clearing a space for San.
“Okay, hop on,” Yunho said, patting the top of the table.
“You want me to get on the bench?” San asked, eying the blank space.
“Yes. I need to do an examination. As we don’t have a proper chair with stirrups, this is the next best thing,” Yunho said, like it was totally and completely normal to study your coworker’s genitals while at work.
Well, San supposed in this instance, it might be.
“Okay,” he sighed, moving to sit on the table. Yunho grabbed his waist again, his hands large and warm on San’s bare hips as he helped San up, practically placing him on the bench. San’s pussy leaked at his show of strength, remembering that Yunho carried him to the couch while he was passed out.
Yunho sat down on the little rolling stool they used in the lab and moved in front of San. His face was right in front of San’s bare knees
“Okay, Sannie, I need you to open your legs.”
San gulped. He was suddenly nervous. He could feel himself getting the table underneath him wet and he was slightly embarrassed.
“I—”
“It’s okay, don’t be scared. I’m just looking,” Yunho said in a low voice, putting his hands on San’s knees. San spread his legs automatically and bit back a whimper, not wanting to come off as desperate.
“And?” He asked breathily, as he bared himself to Yunho. His coworker was just staring at his centre, eyes bright.
“It’s beautiful,” Yunho whispered, rolling closer to the bench and San. San preened and a little slick dripped from his hole. Yunho’s hand slid up his inner thighs and San shivered, spreading his legs wider so Yunho had better access.
Yunho’s hands stopped right on the tops of San’s thighs, his thumbs resting against the outside of the plump lips. San’s hole clenched.
“I should use gloves.”
Yunho slid his hands off San’s thighs to lean to the side and grab two white latex gloves out of the box sitting on his desk. He pulled them on, snapping the left one against his wrist before coming back between San’s legs.
“Okay, I’m going to touch you now, is that okay?” Yunho asked, looking into San’s eyes. His gloved hands felt a bit weird against San’s thighs but San nodded, trusting the warmth—and lust—he saw in his brown eyes. Yunho nodded back, giving San a wink before looking down.
Yunho reached out a finger and stroked a puffy outer lip before sliding into his folds. They were wet from the slick that had been dripping from San since he woke up and Yunho moved his gloved finger around, spreading the juices. San moaned, blushing at his wantonness. Yunho just looked up at him and smirked.
“Does that feel good, Sannie?”
“Yeah.”
San’s answer came out in a pant. Yunho was sliding his finger in his arousal, moving it around and circling his clit. San’s hole clenched again and Yunho’s finger stopped right above it.
“Do you want me to stick it in?”
San’s hole fluttered.
“Do you need to be filled, Sannie?”
San whimpered.
“Do you deserve to have a finger inside you? After all, you just woke up like this.”
San didn’t know where Yunho was getting this from but he was positively dripping now, his juices leaking onto the table.
“Yunho, please.”
Yunho smirked, looking up at San before sliding a finger all the way inside his vagina. San closed his eyes and threw his head back, moaning loudly.
“So good!”
Yunho started pumping his finger in and out, the slick noises loud in the otherwise quiet lab. He used his other thumb to circle San’s clit, not quite touching it but giving it enough stimulation that San clamped tightly on his finger.
Yunho pulled his hands away and San groaned, opening his eyes to look down at Yunho, a pout on his face.
“Why did you stop?” San panted, cheeks red and eyes hazy.
“I want to try something else,” Yunho explained, getting up and going over to the table where they conducted their experiments. When he turned back to San, he was wearing safety glasses.
“Why do you need—?” San asked, legs closing slightly in his confusion.
Yunho sat back down in front of him, gloved hands on his knees and spread him apart once more. He brought his face closer to San’s centre and when he was within kissing distance, he looked up.
“So I can do this,” Yunho said, before licking San’s clit.
“Oh!” San cried out, his knees instinctively closing again. Yunho held them open with his hands, his strong arms not letting them. He swiped his tongue across San’s wet folds, licking up the juices that had been steadily leaking. He kept licking, his tongue warm and firm against San’s soft skin. San just mewled, adjusting his hips so Yunho could eat him out.
Yunho ate hungrily, sucking on his clit, biting it gently before soothing it with his tongue. He lapped up everything San’s hole had drooled before circling his wet entrance. He teased it, the tip of his tongue sliding in before pulling away to lick the puffy folds, smiling when San whined.
“Yunho! More, please!” San begged, grabbing the back of Yunho’s head and pushing his mouth against him. Yunho pinched San’s thigh and San squeaked at the pain, releasing his hands from Yunho’s dark strands. Yunho pulled his face away to give San a look. San whimpered, looking down.
“I’m examining you, Sannie. Don’t rush me,” Yunho said, bringing his hands up to tweak San’s nipples. San arched as the sensation electrified him, his pussy leaking onto the table.
“I’m sorry, I just—” San gasped as Yunho’s tongue dove into his hole, licking inside and going as deep as it could. He moaned as Yunho’s tongue ravished him—it was like the scientist couldn’t get enough.
“God, Sannie, you taste so good…dripping so much, so wet,” Yunho babbled as he came up for air, face shining with San’s juices. San swiped his thumb through the slick on his chin, bringing it to his mouth. He tasted himself and had to agree; his juices tasted sweet. He didn’t have time to think about it though because Yunho’s mouth was back on him.
Yunho was licking him again, this time going a bit lower. He licked a stripe over San’s asshole before coming back to San’s pussy, inserting two fingers this time. He rubbed against the top, finding that ridge of pleasure before bringing a hand up to his chest to tweak a nipple, bringing San to the edge. Yunho licked his clit one more time before sucking on it and that was all it took.
San came hard, walls pulsing around Yunho’s fingers that were still moving, still making him see stars. He thrust his hips against them, riding out his high as he leaned back on his elbows and closed his eyes. Yunho was licking it all up, little kitten licks that sent lighting bolts up San’s spine. Yunho kept rubbing and licking and rubbing and licking, and then—
San squirted.
Clear liquid shot from his hole and onto Yunho’s face. Yunho rubbed San through his orgasm which made San squirt even more, and then Yunho dived back in to drink it from the source. He kept rubbing and sucking and licking until San’s legs closed weakly around his head, bare thighs touching his hot ears. Yunho gave him one last lick before pulling away.
San sighed heavily, and Yunho looked up at him. The scientist was glad he was wearing the safety glasses because they were now dripping onto the rest of his face. He took them off, tossing them in the direction of his computer and brought his arm up, wiping the rest of San’s juices on the sleeve of his lab coat.
“Oh my god, did I just squirt?” San asked, a little breathless. He had lain all the way back when he came but he was propping himself up on his forearms again, looking at Yunho, legs spread.
“Judging by the state of those glasses and my face, I think you did. Glad I put those on,” Yunho smirked, taking his gloves off and throwing them in the bin under his bench. San let out an incredulous laugh before looking Yunho in the eye.
“Do you think I can do it again?”
Yunho nodded eagerly, his face going back to San’s centre before San put a hand on his forehead, stopping him.
“Wait.”
“Yes?” Yunho looked up at San, wondering why he couldn’t bury his face in his pussy right now.
“I wanna see your cock.”
All of a sudden Yunho remembered he was hard. He had forgotten his own dilemma as soon as he tasted his colleague’s pussy, but now that he was reminded of it, he looked down. His cock was straining against his pants and he brought a hand down to rub it, sighing when he finally touched it.
“Take it out, Yunnie,” San whined, and Yunho shot him a look that made him clamp his mouth shut.
He unzipped his pants slowly, not wanting the zipper to catch on anything. When it was all the way down he reached into his boxers to hold his cock before pulling the waistband down below his balls.
Both of them gasped.
His cock was huge.
To be fair, it had been above average before the drug. But now…
“You have a horse cock,” San said, eyes laser-focused on the red, angry-looking head that was leaking pre-cum like crazy. Yunho had started to stroke his massive cock and spread the pre-cum around the head and down the shaft, making it nice and shiny.
“It’s not that big.”
They could hear the slick of his strokes in the quietness of the lab.
“It’s basically that big.”
They both couldn’t tear their eyes away from it, Yunho’s large hand looking rather small while it moved up and down. San let out a noise and Yunho finally looked up, first noticing San’s drooling pussy before looking at his face and seeing his drooling mouth.
“You’re drooling,” was all he said, still stroking his massive cock.
“It’s your fault, you’re so hot,” San whined, bringing a hand down to touch himself, shoving a finger inside and gasping in relief.
“It’s probably just from the drug,” Yunho said, staring at San’s finger going in and out of his hole, shiny with slick and making the most delicious sounds.
Right, the drug. How could San have forgotten what started this? Well, one thing was for sure, the drug was definitely working.
Yunho was pumping his cock and San’s hole couldn’t help but clench around his finger; he wanted Yunho inside him right now. He could just imagine that giant girth filling him up—he shoved three fingers in his dripping pussy and came instantly, shuddering. Yunho slid his warm hands up San’s thighs and gripped them as San rode out his pleasure.
When San calmed down, he saw Yunho staring at his pussy. He took his fingers out and wiped them on his shirt, Yunho’s eyes locked onto his hole. He could feel that there was a little puddle underneath him and he just knew that the bench was ruined.
“Messy boy,” Yunho said before letting out a tut, swiping a finger through the slick. He brought it up to San’s mouth and pressed it against his lips.
“Lick.”
San’s mouth parted, tongue darting out to taste himself on Yunho’s finger. He sucked on the tip, swirling his tongue around and cleaning it off. Yunho moaned low in his throat and San couldn’t help it—he leaked again, whining around Yunho’s finger.
Yunho looked down to see San’s hole fluttering, shoving a finger from his free hand into the wet space, right up to his second knuckle. San bit down on the finger in his mouth and clenched around the finger in his pussy, closing his eyes and moaning as loud as he could with his mouth closed.
Yunho moved both fingers in tandem, fascinated by how San was coming apart from just his hands alone. He inserted another finger in San’s hole, sliding right in as San was dripping. San’s eyes rolled to the back of his head and he shifted on the bench, trying to get Yunho’s fingers deeper.
“God, you’re so wet, Sannie. I bet I could fit four fingers in you no problem,” Yunho said, shoving in a third quickly.
San’s pussy gushed at that, and Yunho was tempted to lap it up. He slid his fingers out of San, dragging them against his clit and causing San to moan loudly. He also removed his finger from San’s mouth, the other scientist sucking hard, not wanting to let it go, eyes pleading with him for something.
“Please, Yunnie, I need to come,” San begged when he finally released Yunho’s finger. He was a sight, magenta hair as dishevelled as his shirt which was rucked up above his abs. His hole clenched around nothing and he pouted.
“I need you to lick me. Or fuck me. Just do someth—”
Yunho slapped his pussy, the wet smack loud and shocking. San’s pussy leaked and Yunho smacked it again, watching the juices flow out.
“Do you like that, me slapping your pussy?” Yunho asked, spanking it yet again. San just whined, grinding his hips against nothing. Yunho smacked it once more for good measure before he dove back in, licking up all the slick San had been dribbling from his hole. He shoved his tongue deep inside like he was trying to lick his walls. San fell on his back, resting on the table and sliding a hand into Yunho’s hair as he ate him out.
It didn’t take much for San to come again, Yunho’s expert fingers making him squirt once more. This time, Yunho was prepared, and even though he wasn’t wearing glasses, he kept his mouth against San’s hole and drank up all he had to offer, flicking a thumb against San’s clit to get more. Only when San was practically crying and tugging on Yunho’s hair did he pull away, wiping his face with the clean sleeve of his lab coat.
“God, you’re good at that,” San breathed, sitting up and panting, legs still spread. He looked down and they both saw Yunho’s cock had been leaking steadily, leaving a giant wet stain on his pants.
“Can I touch it now?” San asked. He reached out a hand and Yunho stood up, getting closer to San.
When San’s hand touched his cock Yunho hissed, instantly releasing more pre-cum. He hunched over San, putting his hands on either side of San’s legs and rested his forehead against San’s. San rubbed his hand around the head of Yunho’s cock, spreading the pre-cum all around.
“Oh my god, that feels so good,” Yunho moaned, closing his eyes and thrusting into San’s hand. San’s hand looked so small holding his dick, his fingers didn’t even close all the way around it.
To be fair, San had smaller hands than Yunho. He took Yunho’s cock in both hands, stroking it before reaching down to fondle his balls which were also affected by the drug.
“You’re so big, Yunnie,” San whispered, squeezing Yunho’s balls softly while thumbing the slit in his head. Yunho’s arms trembled around him and San started jerking him quickly, wanting him to come. Yunho dipped his head down to lick a stripe against San’s neck and San squeezed, startled. He twisted his hand a little too tightly and that’s when Yunho erupted into his hands, covering them with cum.
They both looked down, as Yunho came, watching as his cock kept shooting.
“Wow, you can come a lot,” San said, still stroking his cock. Yunho shuddered and shot twice more, making San’s hands wet and sticky.
“It’s the drug,” Yunho grit out, thrusting into San’s hands.
“Well, jeez, who knew it would affect your cum so much,” San said, finally taking his hands away and wiping them on the outside of Yunho’s lab coat and getting a bit on his sweater. He smiled sheepishly at Yunho who just rolled his eyes before taking off his now dirty lab coat and then his sweater, pulling it off in a way so he didn’t get cum all over his face.
“I think it was in the protocol? Enhanced sex organs and orgasms,” Yunho said, tossing his sweater on his chair before unbuckling his pants and taking them off along with his wet underwear. He tossed those on his chair, too, and then he was standing in front of San naked. San stared, taking in all of him, especially his newly giant cock that was hard again. Or, still hard. He wasn’t sure if it even went down after Yunho came. He shook his head to get rid of his thoughts, remembering he was going to say something before he was distracted by his coworker’s huge dick and balls.
"Where's the part about waking up with a pussy in the protocol?" He pouted, gesturing to his still wet centre.
Yunho let out a little laugh, reaching out to drag a finger through his puffy folds. San let out a whimper and tilted his hips up so Yunho could dip into his hole.
“We’ll add it in later. Right now, I need to fuck you.”
San’s eyes blazed and he unbuttoned and threw off his shirt as well, not caring where it landed behind him.
“Fucking finally! I’ve been wanting this thing inside me ever since I woke up and saw it trying to burst out of your pants,” San said, spreading his legs wide and laying back down on the table.
Yunho caressed his thighs, bringing his cock to San’s hole. He lined himself up, rubbing his leaking tip against San’s wet lips.
“Shove it in,” San panted, needing to be filled. He felt empty and his world had reduced to Yunho and his giant cock that could fill him up so well.
“I don’t want to hurt you,” Yunho said, starting to push in anyway. He couldn’t wait any more either, needing to feel San’s wet heat around him.
The tip popped in and they both moaned, San’s walls clenching around the thick girth and making Yunho almost shoot right then.
“Fuck, you’re so tight,” Yunho said through his teeth, pushing in slowly because he couldn’t do anything else, couldn’t stop now that he had finally started.
“You’re so big…fuck! Feels so good, fill me up Yunnie,” San whined, wrapping his legs around Yunho’s waist. Yunho slid in deeper and San thought he was going to come again just from that.
“You have to open up for me, Sannie. I can’t go any further unless you relax,” Yunho said, stroking San’s tummy. San raised his head off the table to look at their connection, groaning when he saw Yunho was only about halfway in.
“You’re going to tear me apart.”
“You wanted this.”
“You’re going to break me.”
“Just open up!”
Yunho pinched San’s nipples and he unclenched with a gasp, Yunho sliding the rest of the way inside. They both moaned loudly when his balls finally touched San’s ass, Yunho resting his large palms on the table on either side of San’s torso.
“Fuck, you feel so good, Sannie. Gonna come just from being in you,” Yunho breathed, dipping his head down to lick a stripe across the freckles on San’s neck. San shuddered. When he felt Yunho stroking his stomach softly, he looked down and almost came again.
“Holy fuck.”
Yunho’s eyes found his, bright and shiny with lust.
“This is so hot, Sannie. I didn’t think I had this kink, but…” Yunho stroked San’s lower abdomen again. Gently. Reverently. Only he wasn’t stroking San’s tummy, not really.
He was stroking the bulge that his giant cock made inside of San.
They could both visibly see the outline of Yunho’s cock and Yunho rubbed where the tip was, eyes fixated on the bump.
“Fuuuuuck,” San groaned, flopping back down on the bench. He couldn’t look. If he looked, he would come again.
“I’m gonna move now,” Yunho said, mostly to himself because San had checked out, all his senses focused only on the huge dick inside of him. He clenched his walls around it as Yunho pulled out, not wanting to be empty.
Yunho pulled all the way out before slamming back in, San making a noise as his whole body moved from the force of Yunho’s thrust.
“Yunnie,” San whined, clutching at Yunho’s shoulders as the scientist started fucking him. San closed his eyes and laid on the bench, letting his whole body relax as his coworker filled him with his big dick.
“You’re so sexy,” Yunho said, his hands roaming all over San’s torso. His thumbs found San’s nipples and rubbed them, causing San to shudder and Yunho’s hips to falter.
“C’mon, Yunho, don’t stop,” San panted, eyes opening to see Yunho staring at him. He felt a little self-conscious before Yunho’s palms moved to his legs and unwrapped them from his hips, bringing them up and over his shoulders, and pulling San closer to the edge of the bench.
“Yes, fuck me hard,” San said, hands finding Yunho’s arms and stroking them. Yunho closed his eyes and swallowed hard before opening them again. His eyes flashed with hunger and San’s breath hitched before Yunho started moving again.
Yunho pounded into him, fast and quick, San’s pussy leaking from the stimulation. He was practically crying from the pleasure of being filled, thrashing his head against the tabletop and clutching Yunho’s arms. Yunho didn’t stop, dragging his cock against San’s velvety walls as he brought them both to their climax.
“Yunho, please, I need—” San cried, not quite knowing what he needed but he was right there and he needed to come.
“What do you need, Sannie?” Yunho asked, sweat dripping from his forehead onto San’s chest. San whimpered in response, not able to form words as Yunho kept thrusting into him. Yunho leaned down to press a kiss to one of his nipples before rising up again.
“I know what you need, baby. I’ll help you come, okay?”
San just nodded his head against the table, a tear escaping from the desperate want. Yunho moved a hand to San’s clit, spreading some juices around it and rubbing it with his thumb. San keened and then…Yunho pinched it between his thumb and forefinger. Hard.
“Fuck! Yunho, I’m—”
San came around Yunho’s cock, his walls contracting around Yunho’s dick that was still fucking him. Yunho thrust once, twice more and then he came inside San, stilling his hips and letting his cock empty into San’s hole.
He leaned down, resting his sweaty forehead against San’s, brushing a soft kiss against his lips. San tilted his head up and pouted a little so Yunho kissed him harder. His tongue slid out to lick San’s lips and San let him in, the two scientists panting and kissing as Yunho finished coming.
When they couldn’t breathe anymore Yunho pulled away, dragging his head back so it rested on San’s chest briefly before holding himself up again, staring into San’s eyes. Yunho gently removed San’s legs from his shoulders one at a time, kissing the inside of each knee before letting them rest on the bench.
“You filled me up good, Yunnie,” San said, glancing down to where they were joined. Yunho’s cock was still hard and there was still a slight swell in his belly. Yunho rubbed the bulge one more time, both of them moaning before he started pulling out.
“Wait!” San cried out, moving his legs so they were holding Yunho against him.
“What is it?” Yunho asked, brushing his thumb against a nipple and making San tremble.
“I…I forgot what I was going to say,” San gasped, Yunho brushing his other nipple.
Yunho smirked before moving back to pull out again.
“I remembered! Don’t pull out, you’re going to make a mess,” San said, face going red.
“Are you embarrassed, Sannie?” Yunho asked, raising an eyebrow.
“Maybe,” San mumbled, turning his face away from Yunho’s.
“I know something that will make you feel better,” Yunho said, sliding out of San. San pouted but quickly let out a noise as Yunho put his feet flat on the bench, spreading him open for Yunho. Yunho sat down on his rolling stool again and San looked down, making eye contact with Yunho right before Yunho licked his dripping hole. San cried out, resting against the table as Yunho ate his cum right out of San.
Yunho’s tongue licked deep inside, tongue swirling and getting everything he had emptied into San. He held San’s puffy lips open with his thumbs, shoving his face in so he could lick deeper, making sure to get all his cum. San was grinding against Yunho’s tongue, dripping more slick as Yunho ate him out. He put his legs on Yunho’s shoulders, dragging the man closer to his centre so he could grab the back of his head and hold him there. His hips moved up and down and Yunho held his tongue still, letting San ride his face.
“Fuck, I’m gonna come again, this thing is amazing,” San panted, coming against Yunho’s face. The scientist eagerly lapped up San’s juices, moaning as San rubbed his wet pussy against Yunho’s mouth. San let him lick a little bit more before he released Yunho’s head, Yunho giving his shiny folds a kiss before sitting back and running his hands up San’s thighs.
“Can I fuck you again?” Yunho asked, eyes still filled with lust.
“Yeah, please fuck me again,” San said, sitting up and hopping off the bench. He wobbled slightly and Yunho grabbed his hips and held him steady. San put his hands on Yunho’s shoulders and cocked his head. “Actually, can I ride you this time?”
Yunho groaned and pressed a kiss on San’s belly.
“You can most definitely ride me,” Yunho said and patted his thighs, his enhanced erection still leaking against his stomach. San grinned and straddled him, grabbing his cock and aiming it towards his pussy. He lowered himself slowly and they both sighed as he slid all the way down, ass coming into contact with Yunho’s bare thighs.
“God, Sannie, you feel so good,” Yunho said, grabbing onto San’s ass and thrusting his hips up. San let him do it once before raising up and letting his cock fall out. Yunho frowned.
“You said I could ride you,” San pouted. Yunho mumbled an apology and gave San a kiss. San sank back down on his cock, grinding seductively when he was fully seated. Yunho latched onto his neck and sucked a bruise into it before moving to San’s lips and kissing him hard.
“Ready?” San asked as he pulled away, breathing heavily. Yunho nodded and San rose up before coming back down. Yunho spread his thighs, planting his feet on the floor so the chair wouldn’t move as San bounced up and down on his cock. He slid his hands up and down San’s sides and back causing the man to shiver as he rode him, walls clenching every time and making Yunho want to thrust into him.
“So good, Yunnie, I’m gonna come again,” San slurred into his ear, bringing a hand down to rub his clit. As soon as he touched it he came, shuddering against Yunho’s chest.
Yunho came, too, the pressure of San clamping down on him pushing him over the edge.
“Fuck, San!” Yunho said as he squeezed San’s ass. San whimpered into his shoulder and Yunho held him still, emptying into him.
When he was done, he pulled San off his dick and set him on the bench again, diving into his cum-filled pussy and eating him out again. San just gripped his hair and let him lap up his own cum.
Yunho didn’t let San rest until the drug wore off, fucking him, coming in him, and eating him out for the rest of the night. They finally passed out naked on the break room couch, Yunho laying down on his back and San on top of him, both satiated and content.
///
When Yunho and San presented their drug to the board of the company a few days later, they added a warning to it.
Disclaimer: experiment is still in the initial phase so potential side effects are undetermined. Results may vary.