Chapter 70: Gym (7)♥
Chapter 70: Gym (7)♥
Violent movements were out of the question. Both Kang Yu-min and I knew that all too well.
It wasn't like this was our first or second time; we knew exactly what kind of sounds the other made. Moreover, the fact that we knew each other so well was a problem in itself.
Yu-min knew exactly how to tighten around me to stimulate my cock just the way I liked. Her delicate moans pulled at my desires just by listening, and her well-trained body was more than capable of absorbing my indiscriminate lust.
You could call it a form of philanthropy reserved strictly for her brother. Though calling it "philanthropy" was a bit too filthy, that was how I perceived it for now.
And I, in turn, played the role of the convenient cock that satisfied Yu-min’s sexual appetite and cravings.
Whenever we both got serious, we reached a state where we couldn't suppress the sounds we were making.
Moans would spill out, the filthy sound of splashing fluids echoed continuously, and there was even the sound of wet skin rubbing against skin.
With the phone still pressed to my ear, I felt her vaginal pressure tightening around my cock to the point of pain and thought to myself: If I start moving for real, she’ll notice instantly.
And that would lead to a result that nobody wanted. So, while I swallowed hard from the tension, my cock twitched from the thrill of potentially being caught.
It was rock hard despite having just ejaculated. I knew without a doubt this was the result of the 10x Stamina.
It was the same when I was actually working out. I didn't feel the muscle fatigue that should have followed. I wasn't out of breath, and my heart wasn't beating faster than necessary.
There was no strain, no sense of overexertion.
Then again, considering the nature of the Game, it made sense.
The Family-Friendly Game seemed to want me to build a harem out of my own family.
If Mother were still alive, it probably would have given me a quest to do the same with her.
I didn't know what the reward would have been, but looking back now, every reward existed solely for that one purpose.
It provided the capital for Noona’s business to give her peace of mind, gave us VIP cruise tickets to create an opportunity for us to get closer, and when it felt like I lacked the physical strength, it gave me 10x Stamina—something so unrealistic it felt magical.
It wasn't just a simple tenfold increase; it was 10x Stamina designed with the consideration for me to do it more and cum more in every possible way.
I couldn't find an answer as to why it gave me such things, and I realized thinking about it was meaningless.
I simply focused on the facts right in front of me.
The most useful way to use this 10x Stamina was to overlap bodies with my family and pump semen into their uteri.
Realizing this, I looked at Kang Yu-min, who was letting out suppressed moans while covering her mouth.
I reached out and rubbed Yu-min’s waist. Her skin, drenched in sweat, felt unique—a combination of her characteristic firm texture and soft skin that felt like a completely different sensation.
Though she trembled, she didn't push my hand away. Yu-min looked at me with tear-filled eyes while keeping her hand over her mouth, enjoying the pleasure as I began to move my hips subtly.
The sounds of the squelching mixture of semen and pussy juice, and the pre-cum and fluids seeping into every fold, were loud. I didn't know if it would be audible over the phone, and while I hoped it wasn't, my hips kept moving.
From the base to the head, her pussy tightened around every inch of the shaft; it was an addictive pleasure. I felt my rationality slowly blurring as I moved my waist.
As I barely suppressed the moan threatening to escape my lips, a voice of reason whispered more clearly than my own thoughts.
[My, a sister can't even call her brother?]
It was Eldest Noona’s voice. At the sound of that voice, the pussy tightened violently. It was a spasmodic contraction from Yu-min, who had never imagined she’d be getting fucked while listening to her sister’s voice.
Even though I had just come, pleasure crawled up my spine again, making my vision turn white. Is our compatibility really this good? I panted, my eyes twitching.
"Is... that so? Whew, I guess. You did... call often."
Taking courage from the situation, I intentionally let out a moan. Since I had said I was working out, a bit of groaning wouldn't seem strange.
[Mm-hmm. But you're working out? At home?]
"No, hngh, at the gym..."
[The gym? Did you go with Min-i?]
"Yeah. Want me to put her on?"
Yu-min’s eyes widened and she shook her head frantically. In response, I moved my hips up and down in a deep, thick motion as if to show her.
I pulled out past the pussy that tightened as if refusing to let go, then plunged back in, splitting the pussy meat that rubbed against me convulsively to deliver pleasure, reaching all the way to the cervix. The pleasure and impact were enough to shake her entire body; Yu-min’s eyes rolled back for a moment as she gasped, and I continued to deliver merciless pleasure to her.
[No, Min-i hates being disturbed while she's working out.]
Eldest Noona’s voice turned strangely low. I wondered if she had noticed something, but that probably wasn't it.
Quite simply, she was jealous of the fact that I was working out with Kang Yu-min.
I hadn't realized it before, but Eldest Noona probably felt a sense of possessiveness toward me.
If she didn't, there would be no reason for her to suggest I join her company.
[So, you're starting at the company next week, right?]
I curled my toes as I listened to Noona’s proposal, kneading Yu-min’s breasts while feeling her pussy bite down painfully on my glans.
The sensation of them filling my hands felt great. I even liked the damp, heavy feeling of them being soaked in sweat.
Is post-workout sex always this good? Even as I thought that, I had to squeeze out an answer.
"About that... I'm still thinking."
[...Thinking?]
Noona’s voice dropped even lower. Normally, I would have been intimidated, but I drew courage from the testosterone and pleasure filling my body.
"I was thinking about it while working out with Kang Yu-min today... and I think I want to find a way to utilize this 10x Stamina."
That wasn't entirely an excuse. Of course, Yu-min was tightening her pussy so hard it hurt, as if she were misunderstanding something, but I punished that naughty pussy with my hips as I spoke.
"After really getting into the workout today, I felt like it would be a waste if I didn't put this 10x Stamina to use."
[Is that so?]
"Yeah. Even when I exercise, I don't really get tired, it doesn't strain my muscles, and I don't feel like, ugh, there's any load being applied."
As I answered while letting out a suppressed moan, a sense of depravity and pleasure that felt like it was setting my brain on fire surged through me. You could call it a thrill.
It was a pleasure I had never felt even when playing horror games. It felt like it was seeping into every fold of my brain, and I unconsciously let a moan slip through my clenched teeth.
"So, I'm thinking of focusing on exercise. Since you were worried about my career path too, phew, Noona."
The fluent words were an answer squeezed out entirely by relying on my cock. In truth, I was so busy chasing the pleasure that I didn't even know what I was saying.
[For example, what kind of exercise?]
As I listened to Noona, I pulled Yu-min’s waist closer, and her eyes flew open as she trembled. Having reached another climax, her pussy tightened spasmodically, and as I swirled my cock around inside her, centered on the cervix, the sound of her gasping leaked out from behind her hand.
It felt so good. I wanted to keep going like this forever. But if I didn't answer, she’d get suspicious. I parted my lips and barely managed to speak.
"Maybe a marathon... phew, or cycling?"
[Both are sports where stamina is key. Nothing specific decided yet?]
Eldest Noona’s voice sounded thick with disappointment. Right then, a heavy urge to ejaculate surged up, seeping into my brain.
I locked eyes with Yu-min and leaned forward, pinning her against the wall.
Yu-min made a sound like a small, suppressed animal and inhaled my scent so deeply I could hear her sniffing against my chest.
I was going to blow. I was about to cum. The hand holding the smartphone trembled slightly before gripping it tight, and I curled my toes hard, pressing my cock right against her cervix as I panted.
If I cum like this and turn off the contraception, she’ll definitely get pregnant. The thought made the semen in my testicles feel like it was boiling.
Our bodies pressed together, becoming completely one. While Eldest Noona’s voice sounded like an echo in my ears, I intentionally opened my mouth and let out a moan.
[...Jin-ah?]
With her back against the wall, Yu-min lifted her feet off the ground and wrapped her legs around my waist. It was a gesture of complete surrender and permission.
So, I didn't hold back and ejaculated. I filled her pussy—which was now shaped perfectly to my cock all the way to the base—to the brim, pressing my glans directly against her cervix.
As the semen poured out in pulses, Yu-min bit my neck and barely held back her suppressed moans, her sweat-soaked hair brushing against my cheek as she trembled.
And just like Yu-min, whose whole body was convulsing as she resisted the intense pleasure, I too was a mix of thrill and depravity as I coated my personal uterus with sticky sperm.
Resisting the inexplicable urge to get her pregnant, I moved my hips at an angle, diagonally, intent on spreading the sperm to fill every corner of her womb.
[Jin-ah? Are you listening?]
Using the sound of Eldest Noona calling my name as a stepping stone, I amplified the pleasure even further as I gasped. I bit Yu-min’s neck, and her flinch was adorable.
I held Yu-min close during the long-lasting ejaculation, and with the smartphone held behind her neck as I embraced her, I finally squeezed out a response.
I didn't even consider that my heavy breathing might arouse suspicion. I didn't have the luxury for that.
"Yeah, uh, I'm listening."
[Are you okay? Your breathing...]
"I'm working out. It's always like this. It was... manageable, so I tried loading the plates to my limit."
At my words, Yu-min tightened around me. It was cute, as if she were protesting, asking if she was the weight plate.
Talking with her pussy, she's quite talented.
Meanwhile, Eldest Noona asked after me with a voice full of worry.
[The plates? You didn't get hurt? Be careful. I don't want Jin-i getting hurt.]
That in itself was stimulating. Listening to Noona’s worry while I was fucking my personal pussy and second sister, Kang Yu-min.
The sense of depravity was different. A kind of depravity I couldn't find in acts I had already grown used to. I let out a faint laugh as I squirted the remaining semen from my urethra into Yu-min’s pussy.
"Yeah, I'll... be careful."
My voice was thick with moans, but if she thought I had just finished exercising, it wasn't strange. Noona seemed to think so too, as she didn't ask further and gave her parting words to end the call.
[Work hard on your workout. I have to get back to work. Make sure you eat.]
"Yeah, you too, Noona."
[Mm-hmm, hanging up now~]
I slowly pulled my body away. Yu-min’s legs slowly slid to the floor, and her trembling legs finally gave out, causing her to slump down.
There was only the sound of wet skin slapping together. I thought it was a suspicious sound, but Eldest Noona didn't ask about it until the moment she hung up.
Relieved, I looked down at Yu-min, who naturally took my still-erect cock into her mouth.
With eyes and an expression that looked completely dazed from arousal, Yu-min panted as she sucked on my cock. I gently stroked her sweat-soaked short hair, and Yu-min gave the soft eye-smile characteristic of a woman in love as she filled her mouth with my cock.
The call was over, and Yu-min, exhaling ragged breaths and moaning, finally opened her mouth.
Perhaps because of the pleasure filling her entire body, her voice was incredibly provocative.
"You... perverted bastard."
An insult I was already used to. A cliché phrase she barely managed to squeeze out.
I let out a short, mocking laugh, curling the corner of my mouth, and Yu-min gave a bright smile as she took the glans back into her mouth and sucked.
Obsessively, as if licking away the scent of sweat remaining on my cock.
Pervert? Look who's talking. I grabbed Yu-min’s hair and continued, staring into her dazed pupils as they looked up at me.
In the end, it was nearly an hour before we finally emerged from the shower room.