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2025-09-05
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1/1
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Work It

Summary:

“You looked excited when I was spreading your legs open.”
Immediately, Sunoo’s eyes snapped back to Sunghoon. He was speechless.

But Sunghoon wasn’t. “Your eyes were begging me to fuck you. And in public, too. How naughty.”

Sunoo gaped at the older man. His face had turned a deep crimson, and he kept inhaling as though he wanted to scream, but no air was enough.

Notes:

(See the end of the work for notes.)

Work Text:

Clad in sporty shorts and a loose shirt, Sunoo was ready to get sweaty.

At first, he had no intentions of getting a personal trainer at the gym. All he had wanted was to accompany his friend to the gym once and never come back.

Especially that day, he did not have much endurance for being dragged to the gym. Their schedules had been grueling until the last second.

But Sunoo had a weak heart.

Seeing Sunghoon with his rolled-up sleeves, bulging biceps, and sweat glistening all over his pale skin, Sunoo had to go a second time. It was a sight too good to miss out on.

Unfortunately, to have that delicious view, Sunoo had to endure the utter agony of working out, which he had somehow managed to bypass the first time.

And while Sunghoon was the hottest, he was not the most merciful personal trainer to have.

“That’s too heavy,” Sunoo told the man, who was currently holding out two dumbbells for the younger to take.

Sunoo had thought the treadmill was the workout, but unfortunately, it had turned out to be the warm-up.

“Sunoo, it’s only three kilograms each,” Sunghoon argued.

“I’m not used to lifting weights.”

“This is barely considered lifting weights.” Sunghoon sighed and put the dumbbells on the floor. He crossed his arms.

Immediately, Sunoo’s eyes darted to the thick biceps. He hummed. “What about four?”

“I’m not negotiating, Sunoo. I’m sure you could lift even more.” Sunghoon narrowed his eyes at the younger. “You haven’t even tried.”

Sunoo opened his mouth to reject the weights once more, but the other man was already pointing at the equipment on the floor. His mouth shut again. He’d rather get down for something that didn’t include picking up two dumbbells.

So, of course, Sunoo had to make it awfully clear that he was in no mood to work his tired muscles by unceremoniously slumping forward.

Before he even reached the weights, two hands grasped his shoulders and forced him back into a standing position.

Suddenly, Sunghoon was far too close for Sunoo’s well-being.

“What?” The younger asked quietly, genuinely a little confused.

But Sunghoon looked as serious as ever, nearly offended, even. “Don’t pick them up like that. Keep your back straight and bend your knees instead.”

“Geez,” Sunoo groaned. But he listened anyway and crouched down to pick up the weights. They weren’t that heavy, he realised, but he wouldn’t admit that aloud.

“Now,” Sunghoon began his instructions. He walked to stand behind Sunoo. “Spread your legs a little and bend your elbows.”

Sunghoon put his hands on Sunoo’s wrists to instruct his arms into the right position. Sunoo could feel the warmth right up against his back.

“Do a squat,” Sunghoon commanded. Sunoo obeyed and bent his knees.

He heard the older male click his tongue, which was fairly irritating. Sunoo was about to give up, yet unsurprisingly, Sunghoon kept him firmly in that position.

Two big hands enveloped his waist while he was still squatting. Sunoo was pretty certain his buttocks touched Sunghoon’s clothed thighs.

The older explained, “You have to keep your spine straight. You’re arching your back too much.”

Sunoo gritted his teeth. Just a few seconds with the weights by his shoulders and his legs bent, he could feel an extremely uncomfortable burn.

“Let go,” he whined. But Sunghoon wouldn’t do so until Sunoo fixed his posture.

He tried to listen, and so he tucked his hips further in, no longer touching Sunghoon, and his spine no longer unnaturally curved.

“Good,” Sunghoon praised. He removed his hands from the younger man’s waist and told him, “Stand up.”

Sunoo did so. He wanted to put the dumbbells down, but Sunghoon stopped him. “No. You have to lift them now. Stretch your arms over your head.”

Shocked, Sunoo turned his head to look at Sunghoon. “I’m sorry?”

Sunghoon frowned back. “Raise the d-”

“I heard you, Sunghoon,” Sunoo replied with an eye roll. “But aren’t the squats enough?”

“Of course not,” Sunghoon replied flatly. Then he gently grabbed the top of Sunoo’s head and turned it to the front.

Sunoo sighed. He bit his bottom lip and stretched his arms up, but they visibly trembled. He didn’t wait for Sunghoon to comment and slowly brought the weights back to his shoulder.

“That was alright,” Sunghoon noted. He shifted to the side, and Sunoo felt a warm hand on his lower back. He shivered. “Go again.”

Although he was still unmotivated, Sunoo squatted again. Sunghoon held him in place by his shoulders. “When you go up, lift the weights.”

Sunoo took a deep inhale, then pushed up. His eyes were squeezed together, carving little wrinkles into his skin. His cheeks were already flushed. A strained noise left his throat as the weights were raised above his head.

“Go down,” Sunghoon instructed after a second, and Sunoo listened.

They did a few more repeats until Sunghoon finally decided to have mercy on the younger and allowed him a break.

“Hah…” Sunoo huffed as he put the dumbbells down. His body fell to the floor, too.

“Don’t overreact,” Sunghoon scolded him playfully, yet Sunoo was not up for teasing at all.

He whined, “I’m not overreacting.” Sunoo grabbed his own upper arms and pouted pathetically. “It hurts, Sunghoon.”

But Sunghoon only tutted and moved to stand over Sunoo, who was rather surprised by that action. “That was only the first set.”

Annoyed, Sunoo grimaced. His arms sprawled to his left and right.

Even more grating was Sunghoon having the audacity to smirk down at Sunoo, as if the younger wasn’t already terribly close to throwing one of the dumbbells at Sunghoon’s head. He’d like to see him smirk with a dented skull.

But then Sunghoon stretched out both pale hands for Sunoo to take, and his expression relaxed a tiny bit.

The younger, after one more second of procrastinating, put his own sweaty hands into Sunghoon’s. The latter pulled him up smoothly, as though Sunoo weighed nothing.

Suddenly, they were face-to-face. In fact, Sunoo was staring directly at the white skin between Sunghoon’s nose and lips.

He could see the freshly shaven stubble and every mole, all clear and defined. It made Sunoo want to connect them with a sticky trail of his saliva. He was sure he could already taste the saltiness of the sweaty skin.

Sunghoon would be perfectly delicious.

Sunoo truly yearned to get a taste of everything that was Sunghoon— whether it be sweat, spit, or sperm.

And now he was drowning in Sunghoon’s musky scent. His cologne didn’t cover much of the natural odor that had been caused by his physical efforts.

It coated the inside of Sunoo’s nose, all the way down to his lungs. He nearly coughed.

“Do ten more, all right?”

Sunoo’s eyes snapped up. He’d been staring for far too long, but fortunately, Sunghoon didn’t comment on it, no matter how painfully obvious it had been.

“Okay,” Sunoo agreed much more easily that time.

Perhaps Sunghoon’s warmth and scent had coaxed Sunoo into becoming all pliant, ready to bend like a contortionist for the older man.

Reluctantly, Sunoo let go of Sunghoon’s hands and replaced them with the heavy dumbbells.

It took exactly two squats to turn Sunoo’s knees into jelly. But Sunghoon wouldn’t let him stop.

However, he decided to at least support the younger.

Sunghoon stood behind Sunoo, certainly too close, with his hands just over Sunoo’s hips. He bent his knees at the same time as the younger, their bodies glued together.

Sunoo’s limbs became even weaker, and he felt the desperate urge to lean back against the other man, but he couldn’t.

The younger let out an exhausted groan. Then, as they stood back up, Sunoo frantically shook his head. “I can’t!”

Sunghoon put his hands under Sunoo’s elbows to support the weight he was holding. His lips were dangerously close to the smaller man’s ear. He whispered, “Seven more.”

It was maddening. Sunoo had nearly moaned when Sunghoon had spoken so seductively right against his skin. Unfortunately, he was forced to focus on the exercise, which was terribly difficult.

During four out of the last seven, Sunoo was genuinely gasping and moaning. He was trembling, even.

During the last three, Sunoo was pretty much grinding his butt into Sunghoon’s crotch every time they lowered their bodies into a squat.

Sunghoon took the dumbbells out of Sunoo’s hand and put them away as the younger dropped down as though his bones had evaporated completely.

The other man came back casually and crouched at Sunoo’s side with a smile. “You did well. Should we move on to the next?”

The younger turned his head in absolute horror. “Next? What do you mean, ‘next’?!”

“You only finished one exercise,” Sunghoon answered, completely unbothered.

Unlike Sunoo, who was genuinely considering running away, but he doubted his legs would bring him far. Besides, he had a rather uncomfortable and hard problem in his pants.

“That’s enough for a beginner,” Sunoo decided firmly. But Sunghoon merely laughed.

The older man then stood back up, holding a hand out to Sunoo. But the latter stubbornly turned away.

“Sunoo, don’t be childish. You wanted to accompany me.”

That was true. Sunoo hadn’t forgotten, either, but the reason had been to watch Sunghoon and his biceps, which simply asked to be kissed and licked and bitten.

“I’m tired,” Sunoo muttered.

“Just one more?” Sunghoon asked this time. He stepped over the younger. “You can even lie down.”

That got Sunoo seriously considering it. He wouldn’t have to get up, and if he actually did whatever Sunghoon was planning for him, he might earn himself some praise again. And that was enough, apparently.

Sunoo straightened his back on the floor. “Alright. What do I have to do?”

Sunghoon grinned in victory. He went to fetch a dumbbell once again.

“Grab it at the ends,” Sunghoon instructed. Sunoo blinked at the weight, but then held it between his hands. “Good. Keep it raised.”

Already, Sunoo felt his arms wiggle. But he pushed through.

“It’s just crunches,” Sunghoon explained curtly at first. It didn’t make Sunoo feel any better. “Keep your legs straight in the air and use your abdominal muscles to bring the weight towards your toes.”

That didn’t seem too difficult. Sunoo did a couple while Sunghoon counted, but he quickly stopped again. “Please, no more,” he whined.
There was silence that stretched on as Sunoo dropped the weight and his legs.

“Maybe I’ll let you go if you beg a bit more,” Sunghoon remarked dryly.

That was unexpected. It was unlike Sunghoon, too, no matter how greatly he enjoyed teasing the younger man.

“If I beg…” Sunoo trailed off, hardly believing his ears.

Sunghoon crouched down, grabbing Sunoo’s chin and keeping his head in place. His soft cheeks were getting squished by Sunghoon’s graceful fingertips.

“You were rutting against me all needy and desperate earlier, now you can’t even listen to my instructions?” Sunghoon frowned.

He looked disappointed. Sunoo’s gut sank. He could do nothing but stare, apparently, for he was too confused and helpless.

“Yet you were doing so good before,” Sunghoon tutted. He squeezed Sunoo’s face. “I really thought you’d do better. And I was planning a reward, too…”

Clearly, Sunghoon was taunting him. He was playing, pushing, and poking at Sunoo solely with his words. And it worked.

Pathetically, Sunoo grabbed Sunghoon’s arm. “Wait, Hoon, I’m sorry. I’ll finish. I’ll even do more repeats!”

It was evident that Sunghoon only pretended to consider his words deeply. But at the end, he let go of Sunoo and stood back up. “Great.”

Trembling, Sunoo reached for the dumbbell. He stretched his flexible legs at a ninety-degree angle and straight into the air. Then he continued doing crunches. He wouldn’t stop until Sunghoon decided it was enough.

And when he thought Sunoo had put in sufficient effort, the younger was sweaty and panting.

Sunghoon took the dumbbell from him. “Was it that exhausting?”

“Yes,” Sunoo exhaled. He closed his eyes and simply rested on the floor for a bit. Besides the physical discomfort, Sunghoon’s cold tone of voice was weighing him down mentally.

Sunoo wanted Sunghoon to be proud of him.

“That’s good,” Sunghoon replied.

A pout began to crawl onto Sunoo’s face. He was itching to please Sunghoon, to have the man compliment and comfort him.

“You have to stretch,” Sunghoon decided. He walked to the side where he could reach Sunoo’s feet.

The younger nodded sadly, not even looking up. “Okay.”

Clearly, Sunghoon didn’t care. He grabbed one of Sunoo’s ankles, quickly confusing the other man, and pushed it toward Sunoo’s head.

“Sungh— Wait!” Sunoo gasped, somehow trying to stop the stretch. But then Sunghoon had already put his legs into a forward split. The hand that didn’t envelop Sunoo’s ankle was on the thigh of the other leg, keeping it down.

Sunoo was breathing unevenly. His hands trembled as they struggled to find something to hold.

“Just relax,” Sunghoon muttered.

And Sunoo did as told, just like before. He wanted to be obedient to the man currently holding his legs apart.

Sunghoon leaned back after a few seconds. Sunoo was ready to drop his shaking legs and call it a day, but Sunghoon was not. He did not give the younger person a chance for an escape.

Instead, he had smoothly forced Sunoo into a side split.

Sunoo, fortunately flexible enough for Sunghoon’s gymnastics, was now doubting the intentions of the stretching. Although he was rarely at the gym, he was fairly certain that most people don’t stretch by doing all sorts of splits after weight training.

But he couldn’t accuse Sunghoon of anything.

Besides that, Sunoo had to admit he rather enjoyed the older man spreading his legs apart while hovering over him.
Of course, even that moment had come to an end eventually.

“I didn’t think you were this flexible,” Sunghoon mumbled. Sunoo blinked at the older through his parted legs.
“I stretch every day,” Sunoo admitted shyly.

The position wasn’t the most comfortable for a casual conversation; however, the situation caused gentle shudders to trickle down Sunoo’s spine.

Sunghoon hummed in acknowledgment, seemingly unimpressed.

Then all hands left Sunoo’s body. His legs closed again.

They hadn’t done anything except work out and stretch their muscles afterwards. And yet, Sunoo felt debauched.

Sunoo pushed himself into a sitting position. Sunghoon’s eyes were burning through his skin, lighting up his insides and causing sparks to explode along Sunoo’s veins.

“Let’s take a shower.” Even though Sunghoon formulated it as a friendly suggestion, his tone was clearly non-negotiable.

So Sunoo stood up and trailed behind Sunghoon without protest or hesitation.

Usually, Sunoo would have objected, he supposed. Because, as far as he was aware, gyms often had shared showers. But they were at the gym within the HYBE building, so stalls did exist.

Naturally, after fetching non-sweaty clothes, a towel, and soap, Sunoo was assuming his own stall.

Suddenly, before Sunoo was given the chance to react, he was pushed inside a shower that he hadn’t even wanted to take. But he couldn’t have changed it now because Sunghoon blocked the locked door.

Sunoo shuffled backwards, eyes wide. The stall wasn’t huge, so quite early on, his back hit a wall.

Silence fell over them.

It was odd. They had gone to the gym rather late, for their schedules had dragged on that day. And even though there was always at least one other idol in the gym, all the shower stalls were empty. So Sunghoon definitely had no reason to squeeze in with Sunoo.

Eventually, Sunghoon spoke. “I wasn’t sure if you could stand on your own.”

Sunoo’s face heated up, yet he scoffed playfully to try and lighten the mood. It didn’t work. “I can stand on my own.”

“You were trembling,” Sunghoon argued seriously.

“Yes,” Sunoo agreed dumbfoundedly. “But I’m not right now, am I?”

“That’s true,” Sunghoon acknowledged. His gaze drifted shamelessly over Sunoo’s figure. “Still, I don’t want you to faint and crack your pretty little head open.”

Sunoo forced his eyes to the white tiles of the floor. The other man’s words were somewhere between mocking and complimenting, yet Sunoo liked to think it had been the latter.

Nonetheless, standing together in a shower, fully nude and only inches apart, was not an option.
And so Sunoo said, “I can’t take a shower with you.”

“Why?” Sunghoon asked genuinely, it seemed.

“It’s embarrassing, of course,” Sunoo deadpanned.

“And if I only watch you?”

Sunoo nearly gasped at that question. He hugged his clothes tightly to his chest. “That’s even worse, Hoon.”

“Then stop pretending to be so shy.” Quickly, Sunghoon’s tone had changed again, giving Sunoo mental whiplash.
“I’m not pretending to be shy,” Sunoo feebly protested.

The older man approached Sunoo, closing the already small gap between them. “That’s hard to believe, Noo.”

Sunoo felt tingles in his belly at the adorable nickname. But he had to focus, and somehow get Sunghoon away and out of the shower, otherwise he’d burst and drop on his knees for the man.

“I really am not excited about taking a shower together. Sorry,” Sunoo insisted.

“You looked excited when I was spreading your legs open.”

Immediately, Sunoo’s eyes snapped back to Sunghoon. He was speechless.

“What are you…” Sunoo trailed off because, evidently, he was rather confused about what Sunghoon was referring to. His mind wasn’t working.

“The stretching,” Sunghoon stated curtly, as though he never insinuated anything inappropriate. But he wasn’t done. “Your eyes were begging me to fuck you. And in public, too. How naughty.”

Sunoo gaped at the older man. His face had turned a deep crimson, and he kept inhaling as though he wanted to scream, but no air was enough.

Sunoo stuttered helplessly, “Sunghoon, that’s not what I-“

“Don’t worry, Noo,” Sunghoon cut off. He smirked at the younger. “You’ll get your reward.”

“My reward,” Sunoo repeated shakily.

“For finishing your workout,” Sunghoon explained. Sunoo could see his pointy teeth peeking out, now, due to the size of his grin.

Sunoo bit his bottom lip and nodded. He’d long forgotten about trying to verbally defend himself against Sunghoon’s lewd accusations. Besides, he hadn’t been wrong.

“But I’ll let you take your shower in private.” Sunghoon suddenly stepped back.

Sunoo was utterly confused. He stared at Sunghoon as he turned around. Hastily, Sunoo tossed his stuff onto the tiny stool in the corner, the towel barely making it, and grabbed Sunghoon’s wrist.

“Hoon, wait,” he called out.

Sunghoon turned only his head. “Hm?”

“Just,” Sunoo began to gnaw on his bottom lip. “We can take a shower together.”

Clearly, Sunghoon had wanted Sunoo to ask for it. He had wanted to push the younger and then draw back, just so Sunoo would yearn for him. And it worked, unfortunately. But Sunoo was aware of that, meaning he could have resisted. But he did not resist.

Getting undressed was embarrassing.

Sunghoon was not feeling any shame, but he also had a fit body in Sunoo’s barely objective opinion.

Sunoo, though, was trying to somehow hide from Sunghoon’s stare. It was impossible.

Since the shower was not running yet, it ought to be at least a little fresh. Sunoo was feeling nothing but hot, heart racing, and insides aflame.

Unexpectedly, Sunghoon reached forward to turn the shower on. Sunoo gasped as the water hit him. He should have paid more attention rather than trying to sneak a peek at Sunghoon’s manhood.

The younger shuddered as the water began to trickle down his body.

Wordlessly, Sunghoon reached for a bottle which Sunoo assumed to be filled with soap.

In Sunoo’s opinion, the older person was being too casual about their current situation. It was nearly offensive how unaffected he seemed to be, while Sunoo was melting under the hot water like cotton candy.

“Turn around,” Sunghoon muttered.

Sunoo listened immediately. He heard a small pop. Then he was pushed against the wall.

“Sunghoon,” he gasped. Sunoo was unable to step away due to a hand firmly pressing into his lower back.

“Stay calm,” Sunghoon mumbled.

Sunoo felt slick fingers press into the crack of his butt, teasing the rim. He whined. “What are you doing?”

“Preparing you?” Sunghoon stepped closer. Sunoo could feel his body warmth. “Did you not want your reward after all?”

Sunoo whimpered. He hesitated, hands placed awkwardly against the wall of the shower. “I do want to.”

“So don’t squirm so much,” Sunghoon spoke while inserting one finger smoothly into Sunoo’s behind.

The whole time, Sunoo had to press a hand over his mouth. After all, they were still in public, no matter whether they were technically hidden by the stall. If he were too loud, someone could hear, in case anyone even entered the room.

However, staying silent was extremely difficult. Sunghoon was suspiciously good at working Sunoo open with his fingers.

Fairly fast, Sunghoon managed to graze his fingertips against Sunoo’s prostate, causing the other to twitch and cry for more. But he didn’t want to cum until he had Sunghoon lodged deep inside him.

The older, by the time he had three long digits stuffed inside Sunoo, whispered into the other man’s ear, “You’re doing so, so good.”

Sunoo moaned at the praise. He arched his back and pushed his hips towards Sunghoon. “Thank you.”

“So needy and impatient,” Sunghoon murmured.

“Sorry,” Sunoo apologised. He was flushed, neck, cheeks, and ears.

“Don’t be,” Sunghoon whispered. Then he placed soft kisses onto Sunoo’s warm and wet skin. He’d turned off the water, but now they had to be even more careful not to be too loud.

It didn’t take much longer until Sunoo felt the head of Sunghoon’s phallus pressing against his wet hole.
“Ah!” Sunoo flinched in surprise and pressed forward.

Sunghoon grabbed his hips with one hand to pull him back. Nonetheless, he was careful to insert his manhood slowly. It was a reward, after all, so he truly wanted Sunoo to enjoy every second to the fullest extent.

Clearly, Sunoo was enjoying it greatly.

His ginger yet lewd moans echoed through the gym’s bathroom. Sunghoon had done a very good job at prepping him, so it didn’t burn much.

“Are you in?” Sunoo asked breathlessly.

In response, he heard Sunghoon rumble a chuckle into his ear. “Not yet.”

With one more push, he fully shoved his penis into Sunoo, who had his front pressed against the wall of the shower.

Tears pricked in the younger man’s eyes. It felt amazing, so much so, it was dancing on a thin line bordering overwhelming pleasure. Yet Sunoo wouldn’t want to be anywhere else.

“Sunghoon,” the younger called out sweetly.

And it wouldn’t be the last time. He’d keep whining and whimpering and screaming that name.

“Sunoo,” Sunghoon groaned right back. With every thrust, he was more determined to bring Sunoo the most pleasure possible. He wanted the younger to melt in his hands, to become a puddle, to crave more.

Easily, Sunoo molded into Sunghoon’s arms. Every touch sent jolts through his veins.

Eventually, Sunghoon had to turn Sunoo around. A smack vibrated between them as Sunoo’s bare skin hit the hard wall. Sunoo quickly brought his arms around Sunghoon’s neck.

Then Sunghoon smoothly grabbed Sunoo’s thighs and lifted him, pushing back inside and snapping his hips back and forth with such strength, it had Sunoo’s eyes roll back.

Now that they were finally facing each other, Sunghoon could press his lips onto Sunoo’s. And so he did.

Sunoo was momentarily stunned.

It wasn’t very romantic. Not when Sunoo had his eyes squeezed shut and his mouth agape.

And yet, even with Sunghoon pounding into him as though it were their last seconds alive, his tongue was gently caressing the warm insides of Sunoo’s mouth.

Genuinely, Sunoo was going mad in that moment.

Rather weakly so, he tried to kiss back, aimlessly shoving his tongue back against Sunghoon’s.

Their spit mixed and dripped down.

Finally, it was enough for Sunoo to be hit with such an immensely pleasant feeling, he thought he’d rip apart.

His body was shaking all over, legs twitching and nails scratching skin off of Sunghoon’s body. And Sunghoon must have felt the same, for Sunoo’s insides burned getting pumped with Sunghoon’s sperm.

It was messy, but beautiful.

Luckily, they were in a shower and could get to cleaning right away. Cleaning, that might have been filled with sneaky touches and kisses and whispers.

Sunoo had never anticipated that going to the gym could be such fun. Surely, he was willing to go again.

Notes:

Thank you for reading this chaotic mess to the end <3

Also, please don't ever use soap as lube.