Practice Sex
“Practice sex.”
…It doesn’t suit him at all. Knowing that my sister likes this kind of thing, he adds a bit of profanity here and there, but it feels incredibly forced. Even the way he tries to take the lead, gripping my neck as if he were some kind of sadist, doesn’t suit Seo Woojin. In terms of natural flow, the Seo Woojin who used to stay on Discord while thrusting hard, or the one who would diligently rub his cock between my thighs because it felt good, was much better.
Because of that, I worried that if I let my guard down, I might just burst out laughing at how ridiculous he looked… but that fear vanished quickly.
“Hoo… just the tip is in, and you’re already so tight. Fuck…”
“Shut… up… It’s embarrassing.”
As I glanced at his firm forearms bracing on either side of me, listening to the pleasant, hushed sighs falling from above… feeling the heart-pounding pressure in my crotch and the intense heat radiating through the condom, I held my breath. I didn’t think I’d be laughing during sex with Seo Woojin today.
“It wasn’t even this tight the first time I did it with Hayoon.”
“…”
Except for that one thing—him smiling secretly—everything else was perfect.
“Relax. I’m going to bury it all the way in, just like last time.”
“I’m… already relaxed.”
“Then I’m going to force it in a bit.”
“Don’t ask every single time, just do it, you idiot. Are you going to do this to my sister, too?”
“Well, this is just practice, isn’t it?”
“…”
Just get more immersed. It’s fine if you think of me as my sister and thrust like you’re raping her. Just as I was about to swallow my shame and say that, he, who had only been teasing me with his glans until a moment ago, shoved his cock deep inside. It felt like it reached the base of my middle finger. But the thickness was incomparable to any pathetic sex toy. Because of that, I buried my face in the pillow, panting breathlessly. Phew, phew.
I didn’t mind if I had a dildo at home. Every time I masturbated, I’d think of his cock and dig into my vaginal walls with my fingers, but the pleasure hitting me now was incomparable to that.
“…Ah, seriously… you’re so tight…”
“……, …”
“I loosened you up plenty earlier, so why does it feel tighter than last time…? Hoo…”
“! …?!”
My body was prone because Seo Woojin told me to be. My hips were slightly raised because Seo Woojin told me to. My sister’s boyfriend, who had occupied that space as if it were his own, thrust his cock in and out as if he were frustrated.
Even though I was clutching the pillow so hard my hands were trembling, he didn’t care. He was relentless.
“Ung…! Ung-euk…! …Ha… euk…”
…But he made sure his lower abdomen never touched mine. Yet, he was still thrusting so deeply.
“Don’t pull your waist back.”
“Ang, haat…, ah…”
In the midst of it, perhaps because I had tried to run away without realizing it, he gripped my pelvis tightly. Squish, squish, squish. With the sole intention of burying it to the hilt, Seo Woojin treated me like an *onahole*.
“Hoo… hey. Just turn over properly.”
“Hak…, haa…, why all of a sudden…”
“You seem tense and it’s not going in well, so turn over. Hurry.”
“Damn it… just shut up and wait! Your thing is so huge it’s hard… just take it out and talk if you have to…”
“I’ll take it out, so turn over. That’s it.”
“…”
…Ha. Tense, my ass. If I were a virgin, maybe, but that wasn’t the case. I was perfectly fine. He’s just a guy, so he probably wants to look cool. How childish. How childish.
I turned over, grumbling complaints like a cat in my head. My breasts, which had been pressed hard against the bed, now faced the ceiling. And my face, which had been buried in the pillow, also faced the ceiling… No. I didn’t want to show him this. What if, just what if, I was making a loose expression? What if the corners of my mouth were curled up, even though I’d just been treated like an *onahole*? What would I do then?
“Are you going to keep covering your face with the pillow?”
“Why. Do you want to practice kissing with me again?”
That’s why I turned over while still clutching the pillow. It was a little disappointing that I couldn’t have sex while making out with Seo Woojin, but it was far more embarrassing to have my true feelings discovered. Because our relationship was barely hanging on by the excuse of “practice.”
“No. If you’re embarrassed, keep covering it. It’s easier to imagine you’re my sister that way, too.”
“You’re a real pervert. Were you imagining my sister while doing it with me?”
“I’m trying to, but… it doesn’t really work out.”
“Why? Because I’m a little taller? Or because my breasts are bigger than hers?”
“That, too. And because you feel better than her when we have sex.”
“…”
“Anyway, stay still like that.”
“Ung.”
…I feel better than my sister? …No, more than that, he feels gentle again, like he usually does… Does he really think I feel better than her?
I chewed on my lip while clutching the pillow. After catching my breath, I lowered the pillow I was using to cover my face and peeked out with just my eyes. I was curious why he told me to turn over and what he was planning to do. The sight I saw was, unexpectedly, nothing special.
“Hey. Seo Woojin.”
“Why.”
“It tickles…”
“That’s a relief. I was worried you wouldn’t feel anything.”
“That means stop it…! You blockhead!”
My arms were wrapped around the pillow, naturally exposing my armpits. My defenseless shoulders. My breasts, slightly splayed because I wasn’t wearing a bra. My navel. My lower abdomen. …My clitoris. And my thighs.
He was just gently kissing every part of my body. It felt like he was caressing a lover he adored.
“Stop it…! It tickles, so just bury your cock in me…”
It was so embarrassing. I felt like I wouldn’t be able to relax; I’d only get more tense. I kicked my legs, which were caught by Seo Woojin, and tapped his body. …As a healing-type transcendental, his body was disgustingly firm, so it probably didn’t hurt, but it was still humiliating. We weren’t exactly lovers, nor were we just sex partners—we were just “my sister’s boyfriend” and “the girlfriend’s younger sister.”
“If you want to be fucked that badly, spread your legs yourself, Lee Jiyoon.”
“…”
I tapped his arm cautiously with the feet that had been hitting his chest and shoulders. Spreading my legs myself was just too embarrassing.
“You cover your face because you’re shy, and you can’t even spread your legs yourself.”
“…”
“And yet, you’re not embarrassed to act cute and beg to be fucked?”
“Shut… up…”
“Ah. Fuck. Why are you so hot today?”
“I’m just acting appropriately to turn you on, so of course… Ung-euk…”
Thump. Thump. Seo Woojin asked that while tapping my lower abdomen with his cock, which was covered in my fluids. While I was busy frowning and trying to argue back, he smiled faintly and pushed his cock into my pussy.
Past my fingers. Past the place he’d been thrusting until just now. Into my womb. It reached a place where I was certain it was touching my cervix. Press. He hugged me as if to cover my trembling, climaxing body. Press. Instead of thrusting like a beast, he pressed it all the way to the root, leaving nothing behind, and spent a long time there. As if he wanted my vaginal walls to remember the shape of his cock.
For a long time.
“You were tense, alright. Now it’s going in much deeper than before.”
“……, …”
“Jiyoon-ah. Answer me.”
“…”
“I know you haven’t fainted, so answer me. And stop tearing up my pillow.”
“You… son of a bitch… how am I supposed to answer right now…”
“You’re doing well. Just keep doing that, right?”
“Hey, the tip… stop tapping it… Ah, fuck…”
While I was mumbling and scattering my voice under the pillow, because of Seo Woojin—because he had his massive cock buried to the hilt, stroking my nipples and gently digging into the deep spot beneath my navel—embarrassing fluids kept leaking out from between my legs.
Pewt, pewt. Making those sounds, I was busy dirtying Seo Woojin’s body.
“I was planning to do the laundry anyway… but you’ve made it even dirtier.”
“Son of a bitch… son of a bitch…”
Why does it feel so good when he’s just pressing his cock against my cervix? He’d been thrusting like he was going to crush my internal organs, so shouldn’t it be painful? The same question I had during our first “practice sex” floated through my mind. …But now, I think I know.
“Keep cursing. More. More.”
“Hey, stop… the cock, stop…”
“The more you do that, the hotter you get, so keep cursing, Lee Jiyoon.”
“Son of a… bitch… stop pressing that spot…”
“Here?”
“Ung-euk…?!”
Because my cervix was an erogenous zone. It wasn’t that I had some fantasy about a large cock like my sister, who only watched porn where she was raped by massive cocks, but I was just born this way. Even if my sister’s tastes and my own were a little different,
“You’re really fucking cute, you bitch…”
“Stop with the… ‘cute’… stop the bullshit…”
“How is your reaction exactly the same as when I have sex with Hayoon?”
“Ung…, ugh…, haa…”
“I guess that’s expected if you’re twins, but you’re sisters.”
“Ah, don’t… thrust there…”
“If you stopped cursing and honestly moaned that it felt good, you’d be exactly like Hayoon yesterday.”
“Heek…, heh…?”
Because our physical tastes were similar. There was no other answer.
“Hoo…, fuck…”
“Ung-euk…, ugh…, hick…”
“Jiyoon-ah. I’m going to move the pillow, okay?”
“No, no…”
“Then you want to keep doing it like this?”
“Ung…”
“I don’t want to.”
“Hey, wait…”
Seo Woojin stopped the squishing thrusts, buried it to the root again, and grabbed the pillow covering my face. I tried to put strength into my arms because I didn’t want to show him my bare face, but I felt it instinctively.
“It’s in the way, move it.”
“Ah.”
In this state, I could never beat Seo Woojin. Unless I turned him into a block of solid ice, there was no way I could win against him. …I had no idea what it meant for a woman to lead sex. Just being penetrated deeply made my vision go white and my tongue tie. What kind of pathetic man would you have to have sex with for a woman to be able to lead? Every time Seo Woojin pressed against my cervix, my head was filled with question marks, and I just couldn’t tell.
“You’ve got so much saliva on it. What am I supposed to use as a pillow when I sleep…”
“…”
“Your arms. Are you not going to move them? You can only cover your eyes anyway.”
“…”
“Fine. If you don’t like it, don’t answer. It’s easier for me to imagine you’re my sister this way, too.”
“Ueup…”
Under the arms covering my face, his tongue touched my lips, which were busy panting. I didn’t hate it, but… it was embarrassing. I shook my head to shake him off, but as he intensified his movements below to tell me to be quiet, I couldn’t do anything. I could only let out moans that didn’t sound like my own, letting Seo Woojin lick my lips. After exhaling my breath onto his lips several times,
“…”
The arms that were in the way were roughly pulled upward, and my gaze, already melted, was caught by him.
“Open your mouth.”
“…”
As if it were only natural, we overlapped our lips and had sex.
“Chup…, ung-eup…, phew…”
That was all I could do. With both wrists held tight, I had become an *onahole*, and I could only think of one thing.
“Pheu…, eup…”
This… I think my sister would really like this.
“Pheuu…, Lee Jiyoon… Lee Jiyoon…”
“Hey, why are you thrusting harder all of a sudden… Ung…, hick…”
…That, me too. Just like my sister.
“Hoo… fuck…”
“Ah…? Your cock just got a little bigger…, chup…”
“…”
“! …, ……?! …!”
“…”
“……, ………”
Deep down, I think I quite like it.