USU Ch 5

Seo Gihyun circled around the sofa and climbed over me, letting out a faint laugh. The mere fact that he had the same face as Seo Kijoon was enough to send a thrill through me.

I was panting softly. Seo Gihyun’s suggestive gaze slowly raked over me from head to toe before he tapped my half-swollen groin with the back of his hand.

“Ugh…”

“How long have you been hard? I haven’t even done anything yet, Gyeom. You’re such a pervert.”

It was unfair—he was the one doing all the perverted things, and now he was calling me out for being aroused. Maybe it was the suffocatingly heated atmosphere, but I couldn’t muster a clear retort and instead mumbled under my breath.

“You… you touched me like that first.”

“Hm?”

“You’re the one going on about vanilla or whatever, and now you’re blaming me…”

To be honest, I’ve always been pretty detached and unfazed by most things. Growing up with parents who spent most of their time abroad for business, I never learned to act spoiled. That background and my personality helped keep my feelings for Seo Kijoon a secret. You could say I was good at maintaining a poker face.

But for some reason, that was hard to do in front of Seo Gihyun. Why? Was it because of his relaxed demeanor, accepting everything while pretending not to?

They say people’s tone and behavior change depending on who they’re with. Maybe that applied to me too. Since he knew about my long-hidden crush, I might be letting my guard down around him without realizing it.

Whatever the case, Seo Gihyun seemed to find my grumbling quite amusing. The elegant curve of his lips deepened. He responded in a voice laced with laughter.

“So, what, Gyeom? You’re saying you’d get horny for just anyone who touched your dick?”

“What?”

“I’m asking if you’d obediently get hard for anyone who touched you to make you hard.”

Both this guy and that guy had filthy mouths, I had to give them that. Crazy bastard, does he have a rag in his mouth? Or… do people normally get this crude during sex?

The problem was me. Hearing that string of vulgar words somehow made me even more aroused. Even with Seo Kijoon, I’d often get turned on while pretending not to. That probably egged Kijoon on to go wilder.

“Hm? Gyeom.”

“Hah!”

He suddenly grabbed my cock through my clothes.

“You’re even thinking about other things… when you’re the one who begged for help first.”

The tight grip made my hips jerk instinctively. Seo Gihyun kept stroking and rubbing, gradually making me harder.

“Ugh, ah…”

“Feels good?”

“Ngh, yeah… yeah, touch me more.”

Maybe because we shared a secret, a more honest plea slipped out of my mouth. I squeezed my eyes shut to avoid his burning gaze, surrendering to the raw pleasure coursing up my spine. I’d completely forgotten how exhausted I’d been, tired enough to sleep in.

“If it only feels good, how will we know if you’re vanilla or not?”

His tone was lightly scolding, but his hand didn’t slow down, still stroking my cock. I rocked my hips slightly, responding to his teasing touches. But being touched through my clothes wasn’t enough to push me to the edge.

As the heat built, my clothes felt increasingly restrictive. No matter how much I moved my hips, his teasingly light touches were frustrating.

Left with no choice, I reached down. The moment I touched my buckle to undo it, both my wrists were suddenly bound and pinned firmly to my chest. Startled, I opened my eyes, which I’d kept shut.

“Why, what’s…”

Just like he’d said, my voice trailed off as if I were pleading.

“Why are you touching there?”

“What? Inside, I mean… I wanted to touch inside…”

“Then you should ask me to do it. I’m touching you right now, so who gave you permission to touch yourself?”

Oh, is this that thing? The D/s thing or whatever. I’d vaguely heard that a relationship where one gives orders and the other obeys is called D/s. Of course, since it wasn’t Kijoon’s thing, I hadn’t paid much attention to it.

“That’s not what I meant…”

“Lying now, are we?”

“Gihyun…”

The teasing heat made me whimper his name desperately. His hand, rubbing my cock, paused for a moment before resuming.

“Are you calling me that because you want to be punished?”

“What?”

“Get on your stomach.”

Panting with fevered breaths, I looked at Seo Gihyun. Without breaking eye contact, he slid off me and sat on the sofa.

He patted his thigh twice. His order to get on my stomach didn’t just mean to lie down—it meant to press my chest against his thighs and lie across them.

Why? Was he going to loosen me up first? I recalled the long, firm fingers that had stirred me up inside yesterday. I swallowed dryly without meaning to. Noticing my reaction, Seo Gihyun gave a faint smile.

“Hurry.”

I was going to anyway, even without his urging. Was he going to loosen me up and then put it in?

It felt strange. Until now, all my sexual experiences had been with Seo Kijoon. But right now, it was just Seo Gihyun. In his space, without Kijoon, I was here to take his brother’s cock inside me.

I remembered being stopped when I tried to undo my pants earlier. Since he’d told me not to touch without permission, it probably didn’t mean I should strip and climb on.

So, I lay on my stomach across Seo Gihyun’s thighs. My underwear was soaked with precum from his suggestive touches earlier. It felt gross, but if he’d just put it in, I wouldn’t care if he touched me there.

Eager to finish quickly, I wiggled my hips a bit. Despite telling me to lie down, Seo Gihyun just watched me silently. When I shot him an impatient glance, he finally moved his hand. His long fingers reached my buckle.

“Ngh…”

Even the simple act of undressing sent heat pooling in my lower belly. I bit my lower lip to stifle the moans threatening to spill out. The sharp clink of metal echoed a few times before my zipper rasped down. Seo Gihyun pulled my pants and underwear down together.

The indoor heating kept the air pleasantly warm, but my exposed skin still felt a chill. When I shivered slightly, Seo Gihyun gently stroked my pale, bare buttocks with his warm hand.

That’s when it happened. The gentle touch suddenly carried a hint of violence.

Smack!

“Ugh!”

A light crack rang in my ears. My head snapped back. One cheek stung sharply. It was so unexpected that, at first, I couldn’t even process what had happened.

Blinking in a daze, I felt another strike of the same force hit my reddening backside.

“Ah! Why, wait…!”

This time, as if to soothe my shock, Seo Gihyun slowly rubbed the stinging area. His touch was so gentle, it was hard to believe he’d just hit me.

But after two consecutive smacks, even his soft touch felt intense. A faint moan slipped out.

“Ugh…”

“Now that I think about it, Gyeom, we haven’t set a safe word.”

“Safe word?”

He added kindly, “Yeah, a safety word.”

I wasn’t asking for a literal translation.

“That play thing… you’re starting it already?”

At my question, Seo Gihyun kept stroking my still-stinging backside gently. His hand felt unusually cool, and rubbing the heated spot felt refreshing. He raised the corner of his mouth and said, “Not full-on, but I thought we should set a safe word anyway. It’s your first time, after all.”

He’s different from Kijoon in this way. If it were Kijoon, he’d probably have spread my legs and done whatever he wanted without a second thought.

Lying there with my lower half exposed, contrasting his fully dressed state, was a bit embarrassing, but I stayed put, lost in thought.

“I don’t know what to pick.”

“It’s better to choose something you don’t use often. Something that’ll snap you out of it the moment you hear it.”

How am I supposed to know that without thinking about it? I’m not exactly the creative type.

Then Seo Gihyun suggested casually, “How about Seo Kijoon?”

I whipped my head toward him like I’d been struck by lightning.

“What?”

He shrugged with a calm expression.

“Wouldn’t it be pretty embarrassing to say his name while we’re doing this?”

As he spoke, he smacked my backside again, which he’d been gently stroking. Slap! A crisp sound rang out, and a red handprint bloomed on my swelling skin.

“Ngh!”

“Kijoon, Seo Kijoon. Whatever’s fine, just call my brother’s name. I’ll stop right away.”

It was definitely a safe word I was unlikely to say by mistake. I nodded, turning my head forward again, and heard a deflating chuckle from above. He sounded very pleased, letting out a throaty laugh.

“Then I’ll hit a bit harder, okay?”

His words shocked me. It already hurt enough as it was.

But before I could protest, another smack landed on my cheek. Smack! It felt like my lower half was ringing. My stinging backside burned instantly. A large red handprint formed, and his hand struck again.

Slap! If it weren’t my ass, I might’ve called it a satisfying sound, but the pain was all mine, leaving no room for such thoughts.

“Ahh! Ow!”

The humiliation of being spanked so ruthlessly by Seo Gihyun, whom I’d only met twice, with my pants down, made my face flush. But before I could process the shame, another strike came. Seo Gihyun continued spanking with steady rhythm and force. It felt practiced. He must’ve meant it when he said he needed a sub.

As his mechanical strikes landed, a pitiful sob escaped me. When I tried to crawl away, he pressed down on my lower back with one hand, pinning me in place. Unable to move, I took hit after hit on both cheeks alternately. The sharp slap! of flesh meeting flesh made tears well up reflexively.

“It hurts, ow! Stop!”

What was surprising was that, amidst it all, I was getting hard. It was a bewildering reaction even to me.

It wasn’t just pain I felt with each of Seo Gihyun’s strikes. A tingling heat spread beneath my skin, stirring a strange arousal. It was like when my insides were pounded—painful and overwhelming, yet pleasure bloomed within. Each time my tender skin was struck, a jolt of pleasure shot up my spine.

But since spanking was new to me, I’d subconsciously separated it from sex, so it felt strange to realize I was getting pleasure from it, as Seo Gihyun had said. The contradictory desire to be hit more yet stop swirled in my mind.

Even then, Seo Gihyun didn’t stop. A rough smack! echoed in my ears.

“Ugh, ngh, ah!”

I knew the safe word. “Seo Kijoon.” One word, and Seo Gihyun would take his hand off my ass. He’d stop hitting me, stop hurting me. It was like watching a horror movie from outside the screen. The pain could stop whenever I wanted.

Maybe that’s why. Even though I wanted it to stop, I didn’t want to say the safe word. Just a bit more… if I could endure a bit more, if this pleasure could last…

That’s when I felt it. One of Seo Gihyun’s thighs, pressed against my stomach, was getting hard. He was clearly aroused by inflicting pain on me. He’d called himself a sadist, and it seemed he meant it.

“Ngh, ugh! Hah!”

With each continued smack, my rigid toes pushed against the air. My chest pressed against his thigh, making it hard to breathe. A mind-melting pleasure surged through my body along my spine.

Suddenly, Seo Gihyun stopped the mechanical spanking. He slowly rubbed my reddened, handprinted backside. The heat made his hand feel cool. It felt even better because of it.

“Ugh…”

A languid moan slipped out in my moment of vulnerability. Being hit felt good, but the cool hand soothing my ass was just as nice.

When I let out a soft whimper, Seo Gihyun chuckled. I couldn’t see his face, lying face-down, but I could imagine it. That pretty curve would be lingering on his lips.

“Gyeom.”

He called my name in a soft, almost lover-like tone. My voice dragged instinctively.

“Why…”

“Look at this.”

He suddenly slid his hand between his thigh and my lower belly. It was the same hand that had been pressing down on my back. I startled, trying to sit up, but Seo Gihyun was faster, stroking my stomach.

“You came. Did you know?”

No… way. No matter how good it felt, I hadn’t even touched myself, so there’s no way I could’ve come. Propping myself up on my knees, I stared at my core in disbelief.

“Ah…”

Seo Gihyun was right. My stomach, and even his thigh, were stained with a thin, milky fluid. After being wrung dry by both Seo Kijoon and Seo Gihyun yesterday, it looked almost watery, but it was unmistakably semen.

Drained of strength, I collapsed onto the carpet, only to flinch at the sharp pain in my backside and straighten up. Seo Gihyun’s smile deepened as he watched.

“Gyeom, I told you.”

“…”

“You’ve really got a knack for this.”

At that point, I started to think he might be right. The only person I’d ever been intimate with was Seo Kijoon, and since he wasn’t into SM play, I’d never had the chance to explore masochistic acts.

Lost for words, Seo Gihyun scooted closer. He grabbed my arm and pulled me onto the sofa. As I lay back, he naturally climbed over me. His eyes burned quietly with lust as he loosened his tie. He licked his lower lip with a flick of his tongue. The sight sent blood rushing back to my recently spent lower half.

Seo Gihyun wasn’t any different. A part of his thigh was visibly, strikingly hard. The dark, round stain was utterly obscene. I swallowed dryly without meaning to. I was desperate to take it in right now. My overworked hole twitched instinctively.

He whispered seductively in a low voice.

“I’ll show you something that feels even better.”

The deep timbre brushing my ear was enough to make my hair stand on end. My eyes wavered. Really? What’s he going to show me?

He unbuckled his pants without hesitation. With the clink of metal, his fully erect cock sprang free from his underwear.

I hadn’t gotten a good look yesterday, too busy sucking it, but in the bright daylight, it looked even more menacing. The bead embedded below the head seemed almost sinister. When it scraped my walls, it stirred intense, near-painful pleasure, but it was undeniably overwhelming.

Still, knowing that pleasure, I couldn’t help myself. I subtly spread my legs, unable to tear my eyes from the beaded cock.

“Put it in, Gihyun.”

Entranced, my plea slipped out, and he let out a light, approving laugh. Precum dripped generously from his slit, sliding down the menacing shaft. Straddling me, he slowly stroked himself. The slick, lewd sound echoed in my ears. His shaft glistened with fluid.

“Want to eat this?”

“Yeah, hurry…”

I was desperate, staring at the perfect cock right in front of me, unable to have it inside. Remembering how it had ravaged my insides yesterday, my hips twitched instinctively.

“Hmm…”

But seemingly unsatisfied with my answer, Seo Gihyun only tilted his head, letting out a throaty hum without taking action.

I rocked my hips even more. I wanted to spread myself open, but I didn’t have the courage to touch my swollen, recently spanked cheeks.

Suddenly, Seo Gihyun leaned down. Before I could question it, he spread my thighs wider and took my half-hard cock into his mouth.

“Hah…!”

The sudden, direct touch stole my breath. What the hell is this…?! I looked down in shock, and Seo Gihyun smirked, his eyes narrowing like a fox.

“Why, all of a sudden!”

Still holding my cock in his mouth, he mumbled, “I said yesterday I’d suck you off…”

“Ngh, wait!”

“You were so pretty, I ended up fucking you instead of sucking you.”

What a ridiculous answer. He’d called himself a sadist, and I was starting to believe it. He was definitely doing this on purpose. He wanted to see me desperate. Why else would he, rock-hard himself, tease me instead of putting it in?

“Must’ve been disappointed, huh?”

“No, no… it’s not…”

I was practically sobbing. But contrary to my words, the first blowjob I’d ever received was far more intense than I’d expected. The sensitive tip, rubbed against soft, wet flesh, sent sparks flying before my eyes.

“Hng…!”

His hot tongue lapped at my shaft before taking the head into his mouth. The pointed tip teased the indented slit relentlessly, making my toes curl. I pushed against the immovable sofa, the leather creaking under the strain.

He pulled his mouth off briefly, chuckling throatily.

“You look like you’re enjoying it.”

Then, without delay, he rubbed the head against his hot mucosa again. While sucking me, he reached back to rub the tight wrinkles of my hole. Seo Gihyun snickered.

“I’d love to feed you, but not today, Gyeom.”

Disappointed, I let out a whiny tone without meaning to.

“Ngh, why… hurry…”

The front felt good, but my body, used to near-daily sex with Seo Kijoon, craved to feel it inside.

“Your hole’s too swollen. I don’t think you could take me, and what if it tears?”

His words made me nervous. It reminded me of a time early on with Seo Kijoon. He’d come over drunk one night and taken me frantically, and my backside had torn. It had hurt so much I’d sobbed uncontrollably. But Kijoon, drunk and aroused, thought I was crying from pleasure.

As I whimpered with dazed eyes, Seo Gihyun patted my backside soothingly and said, “I’ll do it between your thighs instead. Close your legs.”

It was disappointing, but it seemed better to follow his advice. I’d been too dazed to beg for penetration, and my spanked backside still stung, making it painful to spread.

I obediently followed his instructions. I pressed my thighs together and lifted my legs. As if praising me, Seo Gihyun kissed my outstretched ankles lightly. When I looked at him curiously, he tilted his head.

“Why’re you looking at me like that?”

“Is SM supposed to feel this… ticklish?”

It felt different from what I’d imagined. The SM I’d glimpsed in videos seemed excruciatingly painful—wielding rods or whips mercilessly on bare skin, bordering on torture.

My question seemed to catch him off guard, and Seo Gihyun laughed.

“Gyeom.”

“Yeah? Ngh…!”

I answered softly to my name, but what came was a sudden insertion. He grabbed my ankles, draped them over one shoulder, and thrust his cock between my tightly closed thighs. It wasn’t direct penetration, but the thick, hard flesh sliding roughly between my legs felt like it was pounding my insides.

Not only that, but each time his cock moved, it brushed my now fully erect cock, stimulating it simultaneously. The raw, obscene friction of our cocks rubbing together was overwhelming. Precum from both of us stained my stomach and thighs. The slick, lewd sound of his thrusts filled the air.

“Hah, ah, ah!”

My core tightened, and the insides of my thighs, grazed by his cock, trembled. His thrusts deepened, and as his climax neared, his jaw clenched. My legs, resting on his shoulder, kept slipping from exhaustion. Seo Gihyun hugged both my legs with one arm and thrust even harder.

“S-Slow down…! Ah!”

“Our Gyeom got popped by Kijoon, but there’s so much you’re doing with me for the first time, huh?”

He laughed, sounding pleased, as if it mattered.

“Move your hips properly.”

“Ngh, hah!”

He told me to move my hips, but really, he was ravaging my body as he pleased. I was just swaying to his rhythm.

Taking Seo Gihyun’s thrusts was overwhelming enough. It wasn’t a normal cock—those beads embedded in it heightened the stimulation on my thighs and cock. The sensation of flesh pressing tightly felt unexpectedly pleasurable.

Suddenly, his thrusting grew fiercer. Seo Gihyun stiffened, pulling my legs tighter. A sticky, white fluid shot from the cock between my thighs. A few drops even splashed as far as my chin.

“Haa, ha…”

I could only pant. It felt like I’d sprinted full-speed to my limit. The thought that it was finally over brought a tidal wave of exhaustion.

“Gyeom.”

Too drained to answer, I just looked at Seo Gihyun.

“Think about it.”

I didn’t need to ask what he meant. It was the offer he’d made earlier.

“It’ll definitely be good.”

As expected of twins, Seo Gihyun was saying the same thing Kijoon had when he’d suggested a threesome. It was kind of funny but also annoying, so I turned my head away without answering.

‘I’m tired…’

Tormented by the twins since yesterday, my body felt like it weighed a ton. And why was this sofa so unnecessarily comfortable and cozy…? My consciousness sank deeper and deeper into sleep.

＊＊＊

The reason I wake up slower than others in the morning isn’t because I’m sleepy but because of low blood pressure. Unless I’m nodding off from exhaustion, I don’t even nap. So, even after being wrung out two days in a row, it was natural for me to stir awake on my own.

The scenery before my eyes had changed, but I wasn’t particularly startled. Like the neat and tidy living room, the bedroom’s vibe wasn’t much different.

“…”

The bed was large and plush, like something you’d find in a nice hotel. I patted the pristine goose-down duvet for no reason before glancing around.

The wooden-toned bedroom exuded a cozy atmosphere. Small succulents lined a custom shelf by the window, adding a cute touch. Being a penthouse rather than a regular apartment, the high ceilings gave it an open, airy feel. A large, gold-framed glass on one beige wall held a vibrant abstract painting with colors swirling together.

It wasn’t the kind of scene you’d expect from a stereotypical chaebol movie or drama. It felt soft rather than authoritarian or oppressive. Maybe because Seo Gihyun had been so gentle with me, the setting didn’t feel out of place.

I lay still, turning my head to take in his bedroom. For someone who enjoyed sadistic acts, the space felt surprisingly calming. Then again, he wouldn’t exactly display such private tastes openly in his home.

I was about to get up when a polite knock sounded. It was Seo Gihyun, knocking in case I was still asleep, despite it being his own house.

“Awake?”

“…What time is it?”

“Two-thirty. Wanna sleep more?”

It seemed I’d passed out again and hadn’t slept for long. In high school, I’d joined the soccer club for fun, and after my sister got married, I’d been dragged along by my hiking-obsessed brother-in-law to various mountains, so my stamina was decent.

My thighs and lower back were still sore, but I shook my head.

“No, I’ll get up.”

Seo Gihyun smiled brightly at my answer.

“You can get up, but I’d like you to put some ointment on first.”

“Ointment?”

Only then did I notice a small, flat cylindrical object in his hand. It was so tiny, fitting in his palm, that I hadn’t registered it as medicine.

“Take off your pants and lie on your stomach.”

“…What?”

I frowned at the suggestive request. After yesterday and earlier, he wanted to go again? Is that why he moved me to the bedroom? Sure, he didn’t put it in earlier, but still.

When I openly showed my disbelief, Seo Gihyun let out a surprised breath, looking flustered himself.

“I heard our Gyeom was a pervert, but I didn’t know it was this bad.”

“…”

Kijoon must’ve been spouting nonsense.

“I’m not saying let’s do it again, so hurry and lie down.”

His tone was subtly commanding. Annoyed, I grimaced and started to sit up, but a sharp pain shot through my backside where it pressed against the duvet. I let out a scream like a dying animal, and Seo Gihyun shrugged, his eyes saying, “See?”

The forgotten pain came rushing back. I suddenly remembered being spanked by that large hand just hours ago. And, embarrassingly, that I’d come rubbing against his thigh without even touching myself.

Seo Gihyun, who’d been standing at the door, pulled over a stool and sat beside the bed. He must’ve showered while I was asleep, as a pleasant scent wafted over. It felt familiar—it was the same scent on me.

“Hurry.”

He urged me again. His voice was soft, but there was a firm, sharp edge to it. I didn’t know much about play partners, but I understood that someone who enjoyed sadistic acts would give orders to someone who enjoyed masochistic ones.

Was that why he was so used to commanding? Or was it just natural for an executive director? Either way, the important thing was that I had to bare my ass in front of Seo Gihyun right now.

Careful not to brush or strain my backside, I flipped over. Come to think of it, he’d already seen me naked twice, and this was just applying medicine—almost medical. Why bother being shy?

Besides, if it was medicine, it’d be better to have an expert’s help than to fumble around alone in a hard-to-see spot.

He seemed surprised when I, who’d looked exasperated at the idea of going again, obediently turned over, but I ignored his gaze.

Carefully applying ointment to my visibly red and swollen backside, Seo Gihyun said, “Don’t get hard again.”

“You first.”

Despite my retort, he just laughed silently, amused for some reason. With the sticky sound of viscous liquid being scooped, a featherlight touch followed, so gentle I could barely feel his fingers. I wiggled my toes at the ticklish sensation.

Having finished applying the ointment, he patted my backside gently, like one might a baby, and said, “It’ll absorb quickly. Stay like that for a bit.”

“Okay.”

I buried my face in my arms and lay still as he instructed. But the plush duvet was so cozy that sleepiness crept back in. Unable to lift my drooping eyelids, I surrendered to the encroaching slumber.

If I told Seo Kijoon I’d fallen asleep in someone’s house, bare-assed, after meeting them just twice, he’d probably laugh his head off and tease me mercilessly. But what could I do? That’s exactly what happened—I fell asleep again.