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you deserve it best

Summary:

sion receives a birthday surprise from his number one baby.

Notes:

you know, I wasn't expecting so many people to like that silly rushed fic I wrote during yushi's bday :')

I received so many nice comments and messages that it made me want to write something a little more detailed and structured, so here we are, onyut bday sex pt. 2!

the title is also from ten's birthday :)

I hope everyone enjoys <3

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

Work Text:

Saying that Sion was tired was an understatement. A tour that felt never ending, followed by a two day fanmeet, several encore concerts and another comeback right after. He knew that he was the one that signed up for this lifestyle and, by all standards, he should be happy. With each passing year, his group was gaining more fans, as well as more success and recognition. He was living what some trainees could only ever dream about.

However, the constant schedules were taking a toll on his health, and his body was already showing signs of breaking down. Namely, his knee. The pain had been bothering him for months at that point, and he could only feel thankful that it held up until the promotional period for their new album ended.

Three weeks had passed since Ode to Love came out, which meant the group’s schedule was finally loosening up a bit. It wasn’t much, and he knew that it wouldn’t last, but it was enough for them to breathe a little more freely. He hoped the company would keep its promise and allow him to visit a hospital in order to find the cause of his pain. The longer it went on, the more restless he felt, afraid of permanently damaging his knee.

Even though today was his birthday, he couldn’t let go of his duties. After doing a livestream for the fans, they still had to attend practice. Although, once his manager asked him to accompany him to the convenience store, he knew something was up.

If his suspicions were correct, he knew the members were probably preparing a surprise for him, wanting to celebrate his birthday together in a slightly more private way. Ever since they debuted, this was the first time he was celebrating it in Korea, so it made sense. And no matter how tired he was, he knew he would indulge them. For the past years, they had all managed to grow closer, and Sion was grateful for the fact they could rely so much on each other now. On certain occasions, it helped relieve the burden he carried as their leader.

He was returning to the practice room when he heard it – Yushi singing happy birthday for a few seconds, and effectively ruining their surprise. He smiled to himself, used to Yushi’s shenanigans after so many years by his side.

Just like he anticipated, once he turned the corner, he was greeted by colorful headbands, ribbons and even a delicious looking cake. The members started singing him a happy birthday, though their attempt came off as slightly clumsy. Sion couldn’t help but feel endeared by the people in front of him, grateful that fate had brought them together.

After goofing around for a bit and filming some content, they were allowed to eat the cake before practice, so they all gathered around it, happily munching on the mango and whipped cream.

The practice session went on as usual. By the end, they were all showing signs of tiredness, so once they returned to the dorm, everyone was quick to retreat into their respective rooms.

Sion decided to take a shower before going to sleep. It hadn't been a particularly tiring day, but besides liking the feeling of going to bed freshly showered, Sion enjoyed the spray of hot water on his sore muscles. For once, he took his time and didn't try to rush. He might have even taken longer than Daeyoung.

As he got out of the shower, he dried himself and did his usual skincare routine, careful to not skip any step.

Ever since they changed their dorm arrangements, he got to have a room all to himself. In their crowded and rushed world, it felt like bliss. A little corner of peace and quiet where he could exist only for himself, unguarded. No fake smiles or interactions, no eyes constantly trained on him. He pushed the door open, ready for a good night of rest, only to find out there was someone already inside, patiently waiting for him.

Yushi was sitting right on the center of his bed, clad in what looked like one of Sion’s many oversized t-shirts. Over it, the ribbon that Riku had been wearing earlier. Happy birthday, I’m your gift.

That sentence alone spoke volumes, but Sion still felt like teasing Yushi.

“Yushi, what are you doing here?” He asked as he closed the door behind himself, locking it for good measure.

“I wanted to surprise you,” Yushi replied. “You might fool some of them but not me, you know? I see how tired you are, even on what’s supposed to be your special day.”

Sion felt his shoulders slump at the words, some of the tension leaving his body. If there was someone capable of reading him like the palm of their hand, it was Yushi. There was no use in pretending with him.

Considering the way the tips of his ears were flushed, Sion knew that he was up to no good. It was cute. Even after so many years of knowing each other, of going through countless moments of heartbreak or elation together, sometimes Yushi would still get shy around him.

Slowly, he got up, and the t-shirt failed to cover him past his thighs. If Sion had to guess, he would bet he wasn’t wearing anything underneath.

“And what exactly does this surprise entail?” He asked, raising one eyebrow expectantly.

He could guess what would be Yushi’s reply. They had been messing around for a while now. It started a couple of years ago. They had just been playing around in the dorm when they accidentally found themselves with their faces centimeters apart. At the time, they both pulled away, too flustered to act on their desires. But it was enough to leave them both wondering about what would have happened if they hadn’t been scared. A few months later, they finally caved to the tension that always seemed to surround them and kissed for the first time. Things progressed naturally after that, and what started as lazy makeout sessions in the dorm soon evolved into so much more.

They were always careful, of course. Working in such an industry meant a secret like this could quickly destroy their careers.

But at the end of the day, it was easy. Not only because their schedules meant they were always around each other, but because Yushi understood Sion on a deeper level. Sometimes, they wouldn't even need words to communicate, a simple touch or a nod of their heads would be enough.

Knowing how Yushi’s brain worked, maybe this was his way of trying to reciprocate the way Sion had spoiled him during his birthday night in Bangkok.

“I want to help you relax,” Yushi purred as he walked towards Sion. “But I don’t want you to do any work, I’ll take care of everything myself,” he whispered against his ear.

Sion felt a shiver run down his spine at the words. Most of the time, he was the one to take the initiative, so he loved it when Yushi decided to take charge and boss him around.

Yushi stepped away from him and he immediately missed his presence close to his body. Sion watched curiously as he crossed the room and dragged the chair from Sion’s desk, placing it in a way that made it face the foot of the bed, just a couple of meters apart. When he seemed content with the setup, Yushi walked to Sion and took his hand, pulling him towards the chair and giving his shoulder a light push so that he would sit. Unable to keep his hands to himself, Sion placed them on Yushi's waist, pulling him so that he was standing between his open legs.

As he caressed his sides, he noticed an unfamiliar texture under the material of the t-shirt.

He attempted to lift it, trying to get a look at what Yushi was hiding, but he swatted his hand away.

“No, that’s for later,” Yushi said, carding his fingers through Sion’s hair, “I want to make you feel good first.”

Yushi cupped his face with both hands and kissed him, and Sion couldn’t help but melt into the touch. It had been a while since they had time alone for themselves. By now, they were familiar enough with each other’s bodies, and Yushi took full advantage of that. He didn’t hesitate to lick into Sion's mouth, biting his lower lip in the process too.

Soon, he started kneeling in front of Sion.

Yushi nuzzled his face into Sion's crotch, and if Sion wasn't fully hard before, he for sure was now.

“Ushi-ya,” he gasped.

He pulled down Sion's shorts, along with his underwear, letting his cock spring free. Sion didn’t miss the way Yushi’s eyes darkened at the sight. He wet his lips before inching closer, his face now just a few centimeters away from Sion’s dick, and he mischievously blew a breath in its direction.

Sion shivered at the feeling before trying to warn Yushi, “Ushi, your voice–”.

Yushi momentarily pulled away. “It's okay hyung, we don't have any concerts in the upcoming days. If anyone asks during practice, I'll just say I have a sore throat.”

One time in the past, they had gotten carried away. Sion had been blowing Yushi, who was so out of himself that he started fucking into Sion's mouth without much care. Sion loved it – the stretch, the way he felt himself choke on his dick. But he failed to realize how much his voice would be affected, he only found out on the following day during practice. He didn't want to accidentally put Yushi in the same predicament.

Yushi got back to work. He started by licking the tip, swirling his tongue against the slit, and Sion had to make an effort not to buck his hips. Yushi kept licking it in a kittenish way before finally placing his entire mouth around it, Sion’s cock becoming engulfed in a wet, tight heat.

He started bobbing his head, each time going a little bit deeper, sometimes alternating between sucking and hollowing out his cheeks. Soon, Sion felt himself hit the back of his throat.

“Ushi,” he gasped, placing his hands on his hair so that he had something to grasp, something to anchor him.

Between his legs, Yushi looked debauched. Lips red and swollen, stretched around his cock, saliva dripping down his chin. He kept the same maddening rhythm, taking Sion as deep as he could. He hummed around Sion’s dick and the vibrations almost made him come on the spot.

“Yushi–” Sion gasped, “I– I’m getting close.” He knew that if Yushi kept this pace, he wouldn't last much longer.

Yushi brought a hand to the base of his dick and started stroking him at the same time as he blew him. A familiar pressure started pooling low in Sion’s stomach, threatening to take over him at any second.

“Ushi-ya, I–” Sion’s words turned into a choked off moan as he came inside Yushi’s mouth, who swallowed every single drop, milking him dry until there was nothing more left.

Once he was fully satisfied, Yushi let go of his dick, releasing it with a wet pop. On his knees, looking up at Sion with those intense dark eyes, with spit and cum still on his lips and the pink bow adorning his neck, he looked indecent. Sion wished he could take a photo, keep it with him at all times for when he was alone and in need of desperately getting off. But he knew it was too risky.

Yushi licked his lips, cleaning some remnants of cum, before slowly rising from his knees. Sion took the opportunity to grab one of the edges of the ribbon, tugging him closer in order to pull him into a kiss, licking into his mouth and tasting himself in the process.

“You wanted to take this off, right?” Yushi broke the kiss to ask, tugging at the t-shirt that he was wearing. “Do it.” It sounded like a challenge.

Sion started by removing the ribbon, throwing it across the room. Then, he grasped the material on both sides of Yushi’s t-shirt and pulled it up, leaving Yushi naked, or almost. Because what greeted him was a sight that he had never expected.

Yushi was wearing lingerie. The panties were made of black lace, the pattern seemingly intricate, though it did nothing to conceal his bulging erection. The color contrasted so beautifully against his smooth and milky skin… And on the top of one of his thighs, the one with the strawberry birth mark, a matching garter. Made with slightly daintier lace and adorned with a small bow on top. Sion's brain malfunctioned at the sight.

“Happy birthday, Sionie,” Yushi said.

From the satisfied tone of his voice, he knew exactly the effect he was having on Sion.

“Ushi-ya,” he muttered, still utterly transfixed by the sight.

“You like them?” Yushi asked in a teasing tone. “Remember the last time we went out for a walk? I didn't miss the way your gaze lingered on a certain store.”

Sion blushed, embarrassed that the other man had noticed. They had been taking a late night stroll when they walked past a lingerie store, and he wasn’t able to stop himself from taking a surreptitious look in the windows direction. He had never expected that Yushi would notice and act on it.

His hands finally moved, as if on their own accord, once again reaching towards Yushi's sides. He needed to touch him, to find out how the lace felt on his lover’s skin. However, Yushi pulled back.

“Not yet,” he firmly said. “For now, I want you to sit there and watch, no touching.” He turned and moved towards the bed, climbing into it and scooting towards the headboard.

“Ushi-ya,” Sion whined, “this is not fair.”

“Patience Sionie. If you behave, you’ll get your reward.”

He placed some pillows against the headboard and leaned his back against them. They silently faced each other, Sion in the chair that was stolen from his desk and Yushi comfortably resting on the bed.

Realistically, Sion knew what was about to happen, but there was no way to mentally prepare himself for it.

Yushi trailed a finger down his chest, briefly stopping on his nipples to circle them, before moving down his navel. He took his time, never breaking eye contact with Sion. His cheeks weren’t really blushed but his ears gave him away – Sion knew he was putting himself out of his comfort zone just for him.

He opened his legs and ran a finger down the middle, right next to his cock, still hidden under the lace, but never touching it. When he got to his ass, he pushed the lace aside, so his finger was in direct contact with his hole. Reaching behind one of the pillows, he retrieved a small bottle of lube, and spread some on his fingers.

He went back to his hole and circled it, massaging slightly and pressing only the tip of his finger against it. Once he finally pushed inside, Yushi gasped. His expression was a mix of focus and discomfort, and Sion ached to touch him, to help him find the best angle. He felt his dick starting to stir again, the show in front of him was just too tempting.

However, Sion could only helplessly look on as Yushi stretched himself open, one finger at a time. He took his time with the first one, making sure he was comfortable enough before he added a second one. Slowly, almost agonizingly so, he started to scissor them. It was hypnotic, watching the fingers move in and out of him, the way his wrist moved as he did it.
Sion could tell the exact moment Yushi hit his prostate, because his body jolted with the sensation.

The view was tantalizing. It was everything he could have ever dreamed of.

“Yushi,” Sion said, fighting the will to get up and act on his desires. He loved to pleasure him, to find all of the right spots and angles that made him squirm and moan underneath him.

“Doesn’t feel as good as your fingers, but it will have to do,” Yushi teased, looking at him with half-lidded eyes.

By the time his hips started to move in order to meet his fingers, he added a third one. By now, Sion could see the precum staining the front of his panties.

“Fuck Yushi, can I– touch myself?” Sion asked, going slightly insane with the view.

“Yes.” Came Yushi's reply, his voice breathy and needy.

So Sion immediately got a hand around his dick, stroking it just the way he liked.

Yushi increased his pace, his fingers pumping in and out while he struggled to keep quiet, little gasps and groans escaping him.

“Yushi,” Sion whined. The sounds Yushi was making were going straight to his dick.

“Are you really that desperate?” Yushi asked.

“Yes, please,” Sion squeezed out, “I– I need to feel you.” He itched to reach out, to completely undress Yushi and fuck him just the way he deserved.

Yushi didn’t reply right away, he looked at Sion with an intense gaze, almost as if he was assessing if he was worthy of joining him on the bed.

“Call me hyung.”

What.

“Yushi, I–” Sion started, thrown off.

“You heard me.” His tone left no room left to argue, so Sion obeyed.

“Yushi hyung, please,” he pleaded, his voice strained. The words sounded foreign on his tongue, but he didn't regret them one bit, especially seeing how Yushi's gaze darkened even more.

"What was the best gift you received today?"

Sion didn't hesitate. "You, hyung," he said. "You were the best gift."

“Okay,” Yushi acquiesced. “You can come here,” he ordered, removing his fingers from his hole.

Sion could barely believe he was finally allowed to join him. He got up from his chair and quickly took off his shirt, throwing it across the room in order to join Yushi on the bed in record time.

“Can I kiss you?” He didn't want to risk it, not after Yushi's initial warning about not touching him.

“Hm,” Yushi hummed in agreement.

So Sion crashed their lips together. Gone was the tenderness from their first kiss that day. He was aching for Yushi, for the familiar taste of his lips. He cradled his face and placed a thumb under Yushi's chin, angling his face just the right way.

“You can touch me now, if you want,” Yushi murmured into the kiss.

He didn't need to say it twice. Sion immediately splayed his hands on his skin, feeling the lace under his touch. He grasped the garner on his thigh, marveling at the feeling.

Suddenly, a thought occurred to him. He pulled away from Yushi's lips, looking him in the eyes.

“Ushi… have you been wearing this all day?”

Yushi blushed and averted his gaze.

“You were walking around me, around the others, wearing such a thing and I had no idea…” He couldn't keep the disbelief from his voice.

Yushi was so touchy and affectionate with the other members sometimes, the thought of any of them possibly noticing, especially Riku or Daeyoung… it sent a thrill of jealousy down Sion's spine.

He dived to kiss Yushi’s scar, the one that marred his cheek, before moving lower. Sion couldn’t afford to leave marks that could easily be spotted, so he was cautious as he kissed down Yushi’s neck. He made sure to suck and bite at his nipples, knowing how sensitive Yushi was there. The action immediately ripped a whimper out of him. He rasped his teeth down his navel, finally reaching his destination – the lingerie.

“You look so good in these Yushi, so pretty for me,” he complimented. He kissed his way around it, marveling at the feeling of the lace on Yushi’s soft skin.

Before moving back, he pushed Yushi's legs open so that he could grasp one of his thighs. There, he saw it, the strawberry shaped mark that had become a bit of an inside joke for them.

He licked the mark before biting it, hard. The mark was so perfectly located, he knew he could lavish it with attention and that no one would ever notice. It was for his eyes only to see.

“Sion–,” Yushi whimpered, his voice strangled.

“Your thighs Ushi, you know I’ll never get tired of them,” Sion said, rasping his teeth on the soft skin.

He removed Yushi's panties, not wanting to completely destroy them during what they were about to do, but he left the garter.

Seeing Yushi naked, splayed out in front of him, beautiful skin completely on display except for that one accessory on his thigh… the view wouldn't leave Sion's mind for a long time to come. The stylists had gotten rid of his pink hair just a few days ago, replacing it with a chestnut shade of brown, and it matched perfectly with the flushed tone of his skin.

Sion leaned down, ready to pounce on him, but Yushi stopped him by placing a hand on his chest.

“I meant it, you know? When I said I didn't want you to do any work,” Yushi said, an edge to his voice.

He pushed at Sion's shoulders, making him turn and lie on his back, partially against the headboard. Then, he sat on his lap, each leg bracketing one of Sion's thighs. Sion instinctively placed his hands on Yushi’s waist, steadying him.

Yushi lined up in place and reached for Sion’s cock, giving it a slow stroke.

“Ushi-ya,” he moaned.

Slowly, Yushi lowered himself onto it.

The sensation punched the air out of Sion. He would never get tired of this feeling, of the delicious tight heat that Yushi provided him.

“Sion,” Yushi gasped. They had barely started and he already sounded broken, ready to plead and beg for more.

Suddenly, he dropped down in one go, bottoming out all at once. The action ripped a moan out of Sion, and Yushi was quick to slap a hand over his mouth. His eyes were wide, and there was a frantic edge to his gaze.

“Do you want the others to hear?” he hissed.

Sion shook his head. On one hand, he was embarrassed for reacting in such a way, especially considering the amount of times they’ve had sex before. But who could blame him when Yushi just felt that good? On the other hand, if he was being honest with himself, a darker side of him wanted them to hear. Let them know he was the only one that got to experience Yushi like this. No matter how close he was to Riku, or how much Daeyoung liked to cling to him, Yushi would only bare himself like this for Sion.

Yushi looked him in the eyes for a couple of seconds before deeming it safe to remove his hand.

Sion took the opportunity to praise him right away. “You're always so tight, Ushi, so good for me.”

Yushi started moving, slowly at first, testing his pace. But soon he was riding Sion as if his life depended on it, his muscled thighs getting put to good use.

Sion tried his best to thrust his hips in time with Yushi's movements, going even deeper, making him moan and gasp with abandon.

It didn’t take long for Sion to feel his pace starting to falter. He was too far gone, too entranced by Yushi. The way his neck arched, the beads of sweat running down his temple, his hands grasping for purchase on Sion’s body, not to mention the way he was clenching around his dick.

“Ushi,” he warned, "I'm not gonna last.”

“Me neither, ah–” Yushi's voice broke with a particularly deeper thrust.

Sion took hold of Yushi’s dick, giving it a few strokes, which was enough to push Yushi over the edge. He came with a choked off sound, cum spurting between them as he clenched furiously around Sion.

“Yushi–” Sion gasped. He didn’t have time to say anything else before the orgasm hit him, rolling through him in waves. He thrust a few more times until he finally stilled, spent.

Yushi had slumped against his chest, so Sion hugged him close, arms around his back. When he finally came back to himself, he tried to remove Yushi from his lap, wanting to lay him down on the bed while he went to grab a towel. As much as he hated getting up right after sex, he knew that he procrastinated the task of cleaning them, it would only get messier. However, Yushi grabbed his hand as soon as he felt his body starting to move.

“No, don't go yet,” he murmured.

So, Sion stayed exactly where he was, lazily stroking his skin and occasionally peppering kisses on his face. A few minutes later, Yushi finally let go of him, so he got up to grab a towel to clean them both.

He took special care as he cleaned Yushi’s stomach and in between his legs, trying to not leave any residue behind as well as not pressing too much on any sore areas.

Once he finally laid down again, he was surprised when Yushi pulled him into his chest, securing him in his embrace. Usually, he would always be the one to burrow into Sion’s arms, resting his head against his chest.

“What’s this all about?” Sion softly asked, circling his arms around him.

“You work too much,” Yushi replied as he gently stroked Sion’s back, the words almost imperceptible even in the silence of the bedroom. “I hate seeing you in pain… Promise me that you’ll be more careful, I don’t want to do this without you by my side.” His voice sounded small, hurt almost, and he hugged Sion a bit tighter.

The admission struck Sion speechless.

No matter how tired or how hungry he was, how much his body hurt or how many insane fans he had to deal with, there was only one thing he could do – keep going. Sometimes, he knew that he pushed the limits, but he never considered that his behavior might be inflicting pain on some of the others too, Yushi in particular.

He pulled away slightly before kissing Yushi's chest, right over where his heart was.

“I'll try my best, Yuchi,” he said, “I promise.”

A few days later, the two of them were quietly having breakfast in the dorm when Daeyoung approached them.

“Riku hyung was putting away the laundry and found this choker,” Daeyoung said, lifting a familiar piece of black lace. “He asked me to come see if it’s yours,” he added, looking right at Yushi.

Sion almost choked on his drink, while Yushi froze, his chopsticks stopping mid air.

“I forgot to take it off after an event a while ago.” The lie came so easily that it impressed Sion. “Leave it on my bed, I’ll try not to forget to return it,” Yushi said, sounding genuinely apologetic.

“Okay hyung, I’ll do that then,” Daeyoung replied, moving towards the rooms.

Once they were alone again, Sion and Yushi looked at each other, trying to process the absurdity of the situation. It didn’t take long for Sion to burst out laughing, while Yushi simply hid his face in his hands, the embarrassment getting the best of him.

Notes:

okay so, small wip update for those who might care:

I've been slowly working on the onyut 5+1 farmer sion au, so that should be out soon!

the jaeri f1 side fic is taking me a bit longer than expected, but I promise I haven't abandoned the idea :')

as for future (and longer) onyut works, I've thought of some options: aviation au (confident pilot sion x grumpy air traffic controller yushi) or some sort of a/b/o canon compliant? (I'm not immune to those clips of yushi acting like a pregnant person and sion rubbing his belly okay asdfgsfdjflk)

but I'm also open to other ideas (like a historical or mafia au), so if anybody has any suggestions or preferences, just let me know, I'd truly love to hear people's thoughts!!

as always, any kudos or comments are highly appreciated <3

if anyone wants to reach out, you can find me on my revospring ₊˚⊹ ᰔ

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