Practice Sex
It looks so wrong on him.
I told him my sister likes this kind of thing, so now he keeps forcing a curse into every other line, and it doesn't suit him at all. Seo Woojin, of all people, grabbing for the reins like he's holding a leash, playing at being some kind of sadist—that doesn't suit him either.
If we're talking about what actually comes naturally, the version of him who used to pound into me with Discord still open, or the one who happily rubbed his cock between my thighs just because it felt good—that Seo Woojin is far more convincing. Which is why I worried, just a little, that the moment the tension broke he'd find the whole act ridiculous and snort out a laugh.
"Haa… I only put the tip in, and you're already insanely tight. Fuck…."
"…Shut the hell up. …It's embarrassing."
I keep stealing glances at the hard forearms braced on either side of me. I listen to the pleased little sighs dropping from above in a whisper. I hold my breath against the throbbing pressure in my cunt and the heat I can feel even through the condom—and I know there isn't going to be a single moment today, having sex with Seo Woojin, where I end up laughing.
"It wasn't even this tight my first time with Hayun."
"…."
That secret little smile of his. That's the one exception.
"Relax. I'm shoving the whole thing in, same as last time."
"…I did. Already."
"Then I force it a little?"
"…Stop asking about every little thing and just do it, idiot. You gonna pull this with my sister too?"
"Well, this is practice, so."
"…."
Get into it a little more. Just think of me as my sister. You can fuck me like you're raping me and I won't mind. I was swallowing my shame, about to say exactly that, when the man who'd been doing nothing but teasing me with the head drove his cock in deep.
By feel, only about as deep as the base of my middle finger. But the thickness was nothing a cheap toy could compare to. I buried my face in the pillow and panted—hah, hah—breath coming short and ragged.
If I'd had a dildo at home, maybe it would've been different. Every time I masturbated I'd thought of nothing but his cock and jammed my fingers into my walls, and the pleasure crashing over me now didn't even belong in the same category.
"…Ah, seriously…. You're so fucking tight…."
"……, …."
"I loosened you up plenty earlier, so why are you squeezing harder than last time…. Haa…."
"…! ……?!"
Facedown, because Seo Woojin told me to. Hips lifted just a little, because Seo Woojin told me to. And my sister's boyfriend, occupying me up there like I belonged to him, drove his cock in with hard, frustrated thrusts. I clutched the pillow in both hands and tore at it, shaking, and he didn't care. He just kept going. Hard.
"…Ngh…?! Nngh…! …Ha…hk……."
His lower stomach never quite touched me. Even so, he was impossibly deep.
"Don't pull your hips away."
"Angh, haah…, ah…."
Somewhere in the middle of it I must have tried to run without meaning to, because now he had my pelvis locked in both hands—
Squelch. Squelch. Squelch.
—with nothing in his head but burying himself to the hilt. Seo Woojin handled me like an onahole.
"Haa…. Hey. Just roll over properly."
"Hhk…, haa…, why all of a sudden…."
"You're too tense. It's not going in right. Turn over. Now."
"…Shit…. Shut up and wait a second…! Yours is so damn big it's hard…. If you're gonna talk, pull your dick out first…."
"I'll pull out, so turn over. Good."
"…."
…Ha. Tension, my ass. If I were still a virgin, maybe. I'm not. I'm perfectly fine. He's a guy, so of course he wants to look cool. Childish. So childish. I turned over, yowling my complaints on the inside like a sulky cat.
My breasts, which had been crushed into the bed the whole time, pointed at the ceiling. And my face, buried in the pillow until a moment ago, turned toward the ceiling too—
No. I don't want him seeing this. What if—really, what if—I'm making some loose, slutty face? After getting used like an onahole and stuffed full of cock, what if the corners of my mouth are curled up? Then what.
"Your face. Planning to keep it hidden behind the pillow?"
"…Why. You want to practice kissing with me again?"
So I turned over still hugging the pillow tight. Not getting to have sex with Seo Woojin while stealing those affair-kisses was a tiny bit of a shame, but having my real feelings found out would be so much more embarrassing. Whatever we are is only barely holding together on the excuse of practice.
"No. If you're covering up because you're embarrassed, keep it covered. Makes it easier to picture you as your sister, anyway."
"…You really are a total pervert. You've been imagining my sister while doing it with me?"
"I've been trying…. It just isn't really working."
"Why? Because I'm a little taller? Or because my chest is bigger than hers?"
"That too. And because sex with you feels better than sex with your sister."
"……."
"Anyway, stay just like that."
"……Mm."
…Better than my sister?
No—more than that, he feels gentle again. Like usual.
….
Better than my sister… I feel better?
I hugged the pillow and worked my lips against it for a moment. Once I'd caught my breath, I lowered the pillow I'd been hiding behind until only my eyes peeked out. I wanted to know why he'd told me to roll over, what he was planning to do.
What I saw was, unexpectedly, nothing much at all.
"…Hey. Seo Woojin."
"What."
"…It tickles…."
"Good. I was worried you wouldn't feel anything."
"Th-that means stop, you—! Empty-headed moron…!"
The arms wrapped around the pillow. The defenseless skin near my armpit, bared because of them. My bare shoulder. My breasts, no bra, fallen a little to either side. My navel. My lower belly. My clit. My thighs. All he was doing was kissing me, gently, all over.
How to put it. Like he was caressing someone he loved.
"Stop…! It tickles, so just put your dick in…!"
It was so embarrassing. Far from loosening me up, it felt like it would only make me tenser. I flailed the leg he had caught and drummed it against him. A Healing Transcendent, and his body was disgustingly solid—it probably didn't do a thing. Still. It's humiliating.
We aren't lovers. We aren't even fuck buddies. We're just my sister's boyfriend and his girlfriend's little sister.
"…If you want my cock that badly, spread your legs yourself. Lee Jiyoon."
"…."
The foot that had been beating at his chest and shoulder tapped his arm instead, careful, hesitant. Spreading my own legs—that was too humiliating, no matter how I looked at it.
"…Hiding your face because you're shy. Can't even spread your own legs."
"…."
"And in the middle of all that, acting cute and begging me to fuck you—that isn't embarrassing?"
"…Sh-shut up…."
"…Ah. Fuck. Why are you so damn hot today…."
"Acting—I'm acting just enough to turn you on, so of course—, …nngh…."
Tap. Tap. He asked it while knocking against my lower belly with his cock, slick and sticky with my fluids. I was frowning, arguing back as hard as I could, when he smiled faintly and pushed that cock firmly into my pussy.
Past anything my fingers had ever reached. Past the place he'd been pounding a moment ago. All the way to my womb. It had definitely touched my womb. That was the only thought I had, as deep as he went.
Firm. He covered my body, shaking through a climax, and held me. Firm. Instead of pounding me like an animal—firm—he seated every last inch of himself inside me, root and all, and stayed there for a long time. As if he wanted my walls to memorize the shape of his cock. For a long while.
"…You really were tense. It's going in way deeper than before."
"……, …."
"…Jiyoon. Answer me."
"…."
"I know you didn't pass out, so answer. And stop shredding my pillow."
"…You piece of shiit…. How am I supposed to answer right now…."
"You're doing fine. Just keep going like that."
"Hey, th-that tip…, don't tap it…. …Ah, f…uck……."
I was barely scattering my voice out from under the pillow, mumbling, when Seo Woojin did it. With that monstrous cock buried to the hilt, he brushed down over my nipple and gently prodded somewhere deep beneath my navel, and the shameful liquid kept leaking out between my thighs. Pssht. Pssht. Making those sounds. Busy dirtying his body.
"…I was planning to wash the sheets anyway…. They got even dirtier."
"Bastard…. You bastard…."
All he'd done was press the mouth of my womb with his cock. Why did it feel this good? He'd shoved it in hard enough to crush my insides—shouldn't I be in pain? A question a lot like the one from our first practice sex drifted through my head.
…Except now, I more or less understood.
"Keep cursing. More. More."
"…Hey, st…op……. Your dick, stop…."
"…The more you do that, the harder I get, so keep swearing. Lee Jiyoon."
"You bas—tard…. I said stop pressing there…."
"…Here?"
"Nnngh——?!"
Because the mouth of my womb was an erogenous zone. I didn't have some fantasy about huge cocks the way my sister did, the one who watched porn of women getting raped by monster dicks. I was just born like this. Whatever difference there was between the tastes in her head and the tastes in mine—
"…You're seriously so fucking cute, you bitch…."
"Stop saying, cute…. Cut the bullshit, stop……."
"…How are your reactions exactly the same as when I fuck Hayun?"
"Nn…, nnh…, haa…."
"If you were twins, sure. But you're just sisters."
"…Ah, there, you can't just pound—"
"Take away the swearing and moan honestly about how good it feels, and you're exactly how Hayun looked yesterday."
"Heek…, heh……?"
—our bodies wanted the same thing. There couldn't be any other answer.
"Haa…. Fuck…."
"Nnngh…, nnhk……, …hik…."
"Jiyoon. Mind if I move the pillow?"
"N-nooo…."
"Then you want to keep going like this?"
"Mm…."
"…I don't."
"Hey, wai—"
He stopped the light, wet thrusting, buried himself to the root again, and took hold of the pillow covering my face. I put everything I had into my arms so he wouldn't see me bare, but I could feel it on instinct.
"It's in the way. Move it."
"…Ah."
Like this, I could never beat Seo Woojin. Unless I froze him solid in ice, there was no way I won. I had no idea what sex led by a woman was even supposed to be. Just being taken this deep whited out everything in front of my eyes and tied my tongue. How pathetic would a man have to be before a woman could take the lead? Every time he pressed the mouth of my womb, my head papered itself over with question marks, and I couldn't understand it at all.
"…It's soaked in spit. What am I supposed to use as a pillow when I sleep…."
"…."
"Your arms. Not moving them? You're only covering your eyes anyway."
"…."
"…Fine. If you don't want to answer, don't. This way it's easier for me to think of you as your sister, too."
"…Mmhp…."
Under the arms hiding my face, his tongue touched the lips I'd been panting through. I didn't hate it. That was the problem. It was embarrassing. I shook my head, trying to throw him off, but the moment the movement from below turned rough—as if telling me to behave—I couldn't do a thing. All I could do was spill moans that didn't sound like mine and meekly let Seo Woojin lick my lips.
I breathed against his mouth again and again, panting, and then the arms that had been in the way were yanked roughly upward all at once.
"…."
My gaze, already melted through, was caught.
"…Open your mouth."
"…."
As if it were only natural, all I could do was overlap our lips and keep having sex.
"Mmch…, nnmh…, hah……."
Because that was all it was. Wrists pinned tight, turned into an onahole, I could only think one thing.
"…Hhah…, mm…."
Something like this—my sister really would love it.
"Haa…, …Lee Jiyoon…. Jiyoon…."
"…Hey, don't suddenly thrust so— nnngh…, hik…."
…But I did too. Because I take after her.
"Haa…. Fuck…."
"…Ah…? Your cock just got a little bigger all of a sudden……, …mmph……."
"…."
"…! …, ……?! …!"
"…."
"……, ………."
Deep down, it seemed I liked it rather a lot.