My Little Sister Is the Best F*p Material - Volume 6 Chapter 08: First Time Climax: Fucking My Little Sister While Cuddling and Teasing

Volume 6 Chapter 08: First Time Climax: Fucking My Little Sister While Cuddling and Teasing

I’m going to have sex with my sister. Miyu and I rushed up the stairs and burst into her room, embracing tightly while still standing. Our breaths were ragged, our pounding heartbeats uncontrollable.

“You’re finally going to do it…”

Miyu let her impatient desire slip, gazing at me with expectant eyes.

“Sorry for making you wait.”

I kissed her, stroking her head while holding her close. Miyu clung to me even tighter, pressing herself against me as if there were still space left to close, despite being as close as physically possible. Maybe her large breasts were preventing the full contact she craved. Finding her so adorable, I hugged her so tightly it almost hurt, and she smiled contentedly, kissing my neck in return.

Even amidst such lover-like affection, my lower half couldn’t help but react. My persistently erect, twitching cock was pressed against her stomach. Then it hit me—Miyu wasn’t squeezing me to maximize closeness but to feel my cock against her belly, which she couldn’t quite reach otherwise.

Miyu’s devotion to her lust was cute. It was a sign her instinctual side was taking over, but I was no different. In moments like this, anyone’s animalistic nature comes to the surface. I wanted to embrace her skin-to-skin, not through clothes, and rub my penis against her. The soft, pliable sensation of her stomach I’d felt while cuddling in the living room—I wanted to bury my cock in it.

Driven by that urge, I slipped my hands under her T-shirt. Sensing my intent, Miyu met my eyes, raised her arms in a small “banzai,” and let me lift her shirt and bra off. I quickly stripped off my own top. I unbuttoned her shorts, she unzipped my pants, and we kicked the clothes pooled at our feet aside, tossing off our socks in the process.

We embraced again, skin-to-skin, sliding our hands over each other’s backs, arms, and buttocks, savoring the sensation. Miyu’s body was warmer than mine—not because she was especially aroused, but because that’s her usual body temperature.

I’d known this from sleeping in the same bed, but I hadn’t realized how good it would feel to hold her naked. It was a unique blend of excitement and comfort, unlike anything I’d felt with other girls. Miyu was the best, no comparison.

“Our first time, huh?”

“Yeah.”

Despite all our intimate moments, we’d never touched each other naked outside the bathroom. That made this moment even more special. That joy turned into sexual impulse, and I couldn’t resist pressing my penis, underside flush against her stomach, and rocking my hips to rub it fully against her.

“Nn… Ah…”

The sultry moan that escaped Miyu’s lips wasn’t from surprise but from the stimulation she couldn’t contain. When I rubbed her stomach in the living room, she’d reacted the same way when I touched her with her womb in mind.

Acts that evoke reproduction are Miyu’s ultimate turn-on. Having her penis stimulated so close to her womb while naked felt as pleasurable to her as sex itself.

“Ah… A-Nn… Onii-chan…”

I wrapped my hands around her waist, lifting her slightly to pull her closer, stroking my penis against her smooth abdomen. Even without penetration, Miyu’s abs tensed as if my cock were buried inside her, letting out hot breaths.

“Onii-chan… Stop…”

At first, Miyu moved her hips in sync, but she soon pushed against my chest with both hands, trying to pull away.

“What’s wrong?”

When I slowly stopped and released her, Miyu seemed to return to a neutral state with the last of her rationality—or so it appeared.

“I was starting to fantasize uncontrollably about our future together.”

Choosing her words carefully, Miyu warned me that her mind was teetering on the edge of a safe boundary. After a pause, she continued.

“Stimulating your sister’s womb so casually is very dangerous.”

Her heavy, cautious words were a critical reminder for us on this day. We don’t know how far her sexual instincts might spiral during sex. No matter how much the thrill of her first time heightened her emotions, I had to minimize sexual stimulation.

“You’re right. I need to be careful.”

I have to control myself to avoid impregnating her. She’s bared her true self to me because she trusts I can do that.

“So, shall we have sex?”

“Yeah. Come here.”

Miyu took my hand and led me to the bed.

“I’ll clear the bed.”

As she pushed the bedding aside, her thighs glistened with love juices from her secret place. It was a familiar sight, yet seeing her like this made my chest stir strangely.

After clearing the bed, Miyu climbed on first, kneeling formally, then had me kneel facing her. She stared at my erect cock, rubbing her stomach. When she looked up and met my eyes, I noticed a faint embarrassment she was trying to hide—and that her instinctual switch had already flipped.

“Um… Are we going to conceive today…?”

She asked out of the blue. After our flirting in the living room, holding back from masturbating in her room, and having her womb teased by my penis, her rationality no longer had the strength to resist her instincts.

“What are you saying? You’re still a virgin, Miyu. We need to practice first.”

I responded calmly, composed. Even if things went slightly off-script, I had to overcome this hurdle. If I couldn’t control her raw reproductive instincts, we’d never get to have sex again.

“Oh, right. My bad.”

Miyu gave an embarrassed smile, as if to cover her shame. Apparently, when her mind tipped to instinct, her intellect hit rock bottom, which made her easier to manage—a big help.

“Speaking of, I meant to do this in my room, so I left condoms there. I’ll go grab them.”

“I’ve got condoms prepared.”

Miyu reached behind a tissue box near the bed and pulled out a single wrapped condom.

“My rational self prepared for moments like this.”

She held the condom between her thumbs and index fingers, showing it to me. What a well-prepared sister.

“Your rational side is impressive.”

When I praised her casually, it seemed she treated her neutral and lovestruck selves as separate entities. Asserting her lovestruck side, she bowed slightly, presenting the condom to me.

“Love this me, too.”

“You’re adorable. Of course. How could you not be?”

I patted her head, and she smiled contentedly. We faced each other again.

“Can you put it on?”

I deliberately asked her to do it. It wasn’t for any special reason, but I felt it was the best way to mark her acceptance of my cock as her virgin sister.

Miyu nodded quietly, tore open the wrapper, and took out the condom. She leaned closer to put it on, first holding my shaft with both hands.

“It’s kind of like putting on a wedding ring.”

Miyu murmured, kissed the tip of my cock lovingly, and carefully rolled the condom down to the base. Jealous of my cock for always getting the better treatment, I suppressed my desire for a kiss and laid her down on the bed.

I leaned over her, and we finally reached our first moment.

“Just seeing Onii-chan with a condom on makes my heart race.”

With the condom on, there was only one step left: insertion. This contraceptive screamed that we were about to have sex.

“Want to kiss while we do it?”

“No. Don’t do anything else—just put it in. I want to feel you entering me completely.”

Knowing my leaning over would block her view, Miyu spread her raised knees wide, welcoming my penis.

“I’m putting it in, Miyu.”

I finally got to say those words. Since she caught me masturbating, I’d been rejected for countless naughty requests and lectured across the dinner table. Back then, I never imagined we’d end up naked and in love like this. Now, I was about to enter her vagina.

“Take my virginity, Onii-chan.”

Miyu grabbed her ample breasts with both hands, bracing herself tightly. When I pressed the tip against her entrance, her body tensed, but she didn’t resist, gradually accepting my cock as it slid deeper.

“It’s… so tight…!”

I’d barely inserted the tip, yet her vagina was so narrow I wondered if I’d aimed wrong. Despite her masturbation experience and Haruka’s repeated teasing, the pressure wrapping my cock felt like being gripped by a hand.

“Fwa… Amazing… Onii-chan’s heat… its hardness, its size… I can feel it all through my vagina…!”

Miyu’s vaginal walls, tightly enveloping my cock, sensed every detail—temperature, shape—that would normally blend into body heat. Was it our sibling compatibility? Her inexperienced vagina seemed designed to feel my penis from birth.

“A hole this tight? Even toys can’t compare.”

“Haa… Hau… Does Onii-chan… like it…?”

“I might not be able to cum with anyone but you.”

“Fhehe. I’m glad…”

I lowered my hips, sinking my penis into her vagina, taking nearly a minute to carefully pry her open. Slowly acclimating her, I finally got half the shaft inside.

“Ugh… Onii-chan… My stomach’s so full…”

“Does it hurt?”

“I think I’m okay. It’s hard to breathe, and my stomach’s stretched, but there’s no pain. Maybe it’s my body.”

Given her petite frame, her vagina was abnormally tight, but it might stay this narrow even after breaking in. That thought eased my mind, and I slightly sped up my glacial insertion.

“Higii…! Ow… Agh… Ah…!”

For the first time, Miyu cried out in pain. My head nearly panicked, but I mentally chanted “stay calm” to keep composed, checking her expression for signs of distress.

“Haa, haa, haa… That hurt…”

“Sorry, Miyu.”

“No, don’t apologize. Keep going… It actually reassured me.”

Despite the pain, Miyu’s cheeks softened with joy. Knowing her first time was truly her first, etched into her body, seemed to make her happiest.

“My womb’s aching so much I can’t stand it. Hurry and put it all in, Onii-chan. Make my virginity yours.”

Her eyes, reflecting only me, made it clear. She didn’t want just gentle, ordinary sex.

I’m the lover of this loli, busty, serious, aloof sister who sometimes plays the role of a wife or mother. She’s incredibly smart, always fierce-eyed, yet melts into syrupy sweetness when she’s lovestruck. As the brother who loves her more than anyone in the world, I have to embrace her fully.

“Got it, Miyu…! I’ll push it all the way to your womb…!”

Holding her entire body, I thrust my penis deep into her vagina in one breath.

“Ah… Aah… Onii-chan… Onii-chan…!!”

—I love you…!!

Miyu’s cry echoed through the room. At the same moment, my penis pierced her cervix.

“Hyugiii—!!”

Her scream wasn’t from pain. The instant I thrust my penis deep inside, Miyu arched her back dramatically and climaxed.

“Haaau… Hii… Higu… Hauu… Ah, so good…”

Over years, Haruka had meticulously trained the depths of Miyu’s vagina to melt with pleasure, and now, with her first insertion, Miyu came. She clutched her convulsing body tightly, but with my penis still inside, her entire body continued to tremble, unable to shake off the orgasm’s aftershocks.

“Miyu…”

My gaze was fixed on her body, which had climaxed from the initial penetration.

“Miyu… You’re so cute, Miyu…! Sex feels incredible… You’re insanely cute during sex…!”

The fact that Miyu, a virgin, came from a single thrust was so maddeningly endearing that I couldn’t stay still. With the force of pushing open her cervix, I rocked my iron-hard penis back and forth, keeping it tightly pressed against her.

“Hiyaaa, no… Stop… N-Nooo… Aaaahigu… Aaaah!!”

Miyu moaned and writhed again, climaxing once more after just three strokes against her depths. Her vaginal folds clung tightly to my penis, squeezing from the base with each orgasm, urging me to ejaculate.

“Haa… Miyu… Miyu…!!”

The tip was enveloped in the soft flesh near her loosened cervix, while the shaft was gripped by her tight vaginal walls. Both thrusting and pulling out sent overwhelming pleasure coursing through me, with nowhere to redirect it. Ejaculation was my only option, and in the brief moments before release, I thrust with all my might, imprinting my cock into Miyu’s first time.

“Miyu… I’m gonna cum…!!”

Just before ejaculation, I pressed the tip against her cervix and contracted my ejaculation muscles like pulling a trigger.

“No, Onii-chan!! Not that—!!”

The last shred of Miyu’s rationality issued a warning, but there was no time for me to stop. Even as she cried out, my semen shot toward her womb.

“Aah, nooo… Aaaahigu…!! Aaaah…!! Ah…—!!”

With each throb, throb of my semen hitting her cervix, Miyu climaxed an equal number of times. Even through the condom, for Miyu—who could sense every detail of the inserted penis—the sensation of semen flooding her womb was beyond what she could endure.

“Ah… Aah… Onii-cha… Haa… Fwa… Hyugo… I… Hyuki…”

Unable to breathe properly, Miyu’s stomach swelled with each deep breath, my still-hard cock remaining inside her vagina. Yet, lying there exhausted after I came inside her, Miyu’s face looked so blissful that I wanted to stay connected, at least physically.

“Miyu, you okay?”

I placed a hand on her cheek, asking in a soft voice. The goal of minimizing stimulation was, regrettably, not quite achieved, but I think we made a good memory for her first time.

“Ehehe… I’m fine…”

Miyu took my hand from her cheek, holding it with both of hers and nuzzling it affectionately.

“Sex with you felt so good, Miyu.”

Even now, my erect penis was still tightly squeezed by her vaginal walls. Miyu reached down to our joined parts, feeling the connection with her fingers.

“We’re really connected…”

I can’t imagine what it feels like for a girl to have a penis inside her, but seeing Miyu touch our connection with such joy was enough for me.

“Becoming one with Onii-chan feels like this, huh?”

Miyu fiddled with her vagina, now filled with my penis, leaving no gaps. Her speech was clearing up, and her consciousness seemed to be sharpening again.

“You’re not feeling sick or anything? Like an urge to mate wildly…?”

If her instincts were in overdrive, her brain would be consumed by a desire to conceive with me. She looked calm enough, but this sister often hides intense lust behind her serious expression, so I couldn’t let my guard down.

“Unfortunately, about ninety percent of my brain is currently occupied with fantasies of being bred by Onii-chan.”

Miyu said this with a faux-calm demeanor.

“That’s bad, huh?”

“Very bad.”

When Miyu shrank back and looked at me, her vaginal muscles tightened around my penis with a squeeze.

“Ejaculating at my cervix is absolutely no good.”

“Sorry…”

Even in this situation, I’m getting scolded by Miyu. But she’s one hundred percent right on this one.

“I’m starting to feel weird about being penetrated with a condom.”

“A-Are you okay?”

“You love me, so why did you cum in the condom instead of me…?”

Miyu, lost in thought, suddenly looked dejected, as if something had dawned on her.

“Was I not charming enough? I’m reflecting on it.”

Her words were starting to lose rational sense. As she said, her brain was being overtaken by reproductive instincts. Also, she was aware she lacked charm, huh?

“I used a condom because I love you, Miyu.”

I had to soothe her gently as her brother.

“If you got pregnant, sex would get tricky. We just became lovers—going sexless so soon would suck, right?”

“That would be really bad.”

Miyu calmed down. Maybe I could manage her like this.

“Ugh… I just want to be impregnated with Onii-chan’s sperm…”

Miyu writhed in frustration, feeling my cock still inside her and letting out an “Ah… Feels good…” moan.

“I want to plan our life properly, Miyu. So let’s take our time with sex.”

As I tried to calm her, Miyu glanced at me and started speaking softly.

“It’s not that I want a baby… Well, if you asked if I want one, I’d say I really do. But my rational side is holding that back, so I’m still sensible.”

Miyu made a surprising confession and continued.

“So, it’s like a compromise. I just want to conceive with your sperm, and if I can have your genes imprinted in my body, that’d satisfy me for now…”

Her words were incoherent, but I got the gist. Her instincts craved procreation, but she understood it wasn’t practical for us now. So, she was begging for a mark of my ownership, something as irreversible as possible.

“I get how you feel, Miyu. I’m really happy. But that kind of erotic manga stuff is just not feasible.”

“Why not? Isn’t there a pill to keep an embryo dormant…? Then I could have all my eggs fertilized by your sperm…”

Miyu’s mind had gone full 2D. Maybe from binging hentai during some study session, her thoughts were veering wildly unrealistic.

“If I can’t have a baby now, I at least want a body that can only bear your children…”

Hearing her voice her longing so wistfully, I realized I couldn’t just keep lecturing her.

“No need to rush. I’ll make sure to get you pregnant someday. Just hold on a bit longer.”

I whispered to her, giving her a light kiss. Her emotional intensity calmed instantly—though her eyes sparkled like they had heart marks—and she listened to me obediently.

“I’ll wait forever.”

In that moment, her face overlapped with the usual composed Miyu. Whether serious or sexual, Miyu is Miyu, and both sides are precious parts of my lover. I want to never forget that.

As a vow, I kissed her for a long time. Nose to nose, gazing at each other up close, I kissed her forehead and cheeks, over and over, locking lips with her repeatedly.

Her lips grew wet with saliva, and when I licked it off, Miyu couldn’t resist entwining her tongue with mine. Realizing she’d been giving me blowjobs with such a small mouth, I felt a surge of joy, my penis swelling even more. Aroused as much as before ejaculation, I thrust my tongue into her mouth, and her connected vagina tightened with a squeeze.

“Nn… Onii-chan.”

Miyu parted her lips slightly, speaking in a voice so soft only I could hear at this distance.

“There’s another one. Use it.”

She meant the spare condom hidden behind the tissue box. Even Miyu, who’d prepared it, didn’t think one would be enough.

“Does it hurt?”

“No pain. But when you grind deep, my head goes crazy, so I want to stay conscious and have sex with you like this… Okay?”

“Of course. It’s your first time, so we need to make it a clear memory.”

I teased a bit, but Miyu nodded shyly. As we kissed again, I swapped the condom during our second long kiss.

“Miyu, I love you.”

Saying it out loud was more embarrassing than I expected. But it felt like the only time I could say it.

“I love you, too. You’re the only person in the world I love.”

Miyu looked straight at me with her wide eyes. But her suppressed sexual instincts seemed to burst free, and after a blink, her eyes were once again filled with lustful hearts.

“H-Hurry and put it in.”

“Oh, sorry. I wasn’t trying to tease.”

This banter might be what makes us us. I signaled by pressing the tip against her entrance, then inserted my penis. To avoid reaching her cervix, I carefully gauged the stroke depth after half the shaft was in.

“Nn, ah, Onii-chan’s… inside…”

Miyu trembled with joy, wiggling her feet. Her vagina was just as tight the second time, so even with only half my penis inside, the stimulation was plenty.

“How’s it feel, Miyu?”

“It feels good. But I think… a bit deeper might be okay.”

“Then, just a little more…”

“Ah, hinyaa…! No, no, that’s too much…!”

“Sorry.”

I switched back to shallow thrusts, letting her settle. Gauging the perfect depth was trickier than expected. There was a sweet spot where Miyu could just barely handle the pleasure, between the depth she could take rationally and the depth that made her lose her mind. Ignoring it would let me keep shallow thrusts, but hitting that spot made her melt, so I was determined to find that boundary.

“Nn, aah… I love that spot… So good… Aahh!”

“Miyu, almost there. I’m starting to get the hang of it.”

Enduring the intense pleasure of her tighter-than-a-loli-onahole vagina, I desperately sought the spot that made her react best.

“Fwa… Aah…!”

Her breasts jiggled with my thrusts. Even as the fat shifted sideways, they retained their perky shape, stealing my gaze. Suppressing the urge to devour them, I focused on adjusting my thrusts.

“Haa… Uu… Getting tapped on my womb and edged like this is driving me crazy…”

“Just hold on a bit longer.”

I wasn’t exactly composed myself. Her vagina’s constant squeezing, begging for semen, was pushing my endurance to the limit.

“Ahn, ah, Onii-chan, you’re getting good at this…”

“Ugh… Guh… Miyu… I’m… at my limit…”

I was starting to pinpoint her sweet spot. But even knowing the spot, I couldn’t keep stimulating it. The more I hit a girl’s pleasure zone, the more intense the pleasure surges back to the guy.

“An, ah, nnaa… Aah, ah… Don’t stop… Keep going…”

“Ugh… Miyu, saying that… I’m… gonna cum…”

Miyu wouldn’t let me stop, so I had no choice but to keep thrusting. Trying not to ejaculate, my movements became jerky and awkward.

“Ah… Nn… Onii-chan, you’re about to cum… So cute…”

“I’m seriously at my limit…”

A few more thrusts, and I’d pass the point of no return. Torn between letting go and stopping to avoid cumming, I chose to halt.

“You stopped…”

“Sorry… Even without moving, I’m about to cum…”

Even motionless, her vaginal folds pulsed, squeezing my penis, threatening to push me over the edge.

“Fufu. I actually kinda love when you’re holding back from cumming.”

“No surprise there, with how often it happens.”

I took deep breaths, trying to dispel the heat of impending ejaculation.

“I love my quick-to-cum Onii-chan, too.”

“Didn’t you say I need to fix that?”

“As far as reproductive ability goes, being able to release sperm quickly is excellent.”

“I see.”

My premature ejaculation stems from the instinctual urge to impregnate Miyu, so in that sense, our compatibility is perfect.

“But saying that makes it sound like rational me just wants to have lots of sex, so let’s drop it.”

“Yeah.”

That’s probably true, but I didn’t push it to avoid another lecture.

“We’ve calmed down, huh? What now?”

“Hmm… I feel so fulfilled, so I’ll leave it to you, Onii-chan.”

If we resumed sex, Miyu would likely let me cum without making a fuss. But that felt like a bland way to end things.

“Miyu, can you sit up?”

“Sure.”

I pulled out my penis, had her sit on the bed, then turned her around to face away from me.

“Put your hands on the bed.”

“Okay.”

“Lift your hips.”

“N-No way!”

Miyu, guessing my intentions, resisted my earnest request.

“Please.”

“No…!”

She stubbornly refused to get on all fours. All I wanted was to take her from behind.

“You know I’m starting to calm down and get rational, right? I can’t do something as embarrassing as posing like a dog.”

“It’s called doggy style, a proper position. It’s a human act.”

I lifted her hips, sliding my erect penis along the groove of her buttocks.

“H-Hey… That’s not okay…”

“You’d rather I cum inside your vagina, right?”

“Well, yes, but…”

Her resistance weakened suddenly. I could push through now.

“I’ll start with just the tip.”

“Ah, ah, aah, don’t just… do it…!”

Miyu tensed her back in a final act of defiance, but it couldn’t stop her beloved Onii-chan’s penis. In the end, I thrust mercilessly into the hole she offered.

“Aaun… Ah, hiaa, n, aaaah!! Aah, ah, hinyaah!! Au, an, ah, aaauu… Hyauaaa!!”

Restraining her entire body as she resisted upright, I hugged her from behind, arms and all, thrusting upward in a rear-facing sitting position. Her body convulsed violently, and despite not hitting her depths, she climaxed easily.

“Haa, aaahii… Naa! Onii, hyaai, don’t… Nnuaah… Ah, aaaah!!”

I released her, letting her place her hands on the bed to get on all fours. Her legs trembled, and each thrust produced lewd, wet sounds.

“Aaau… Aah!! Naaaah!! Nn, aah!!”

“Miyu, if you moan that loud, the neighbors will hear.”

“Feh, ah, hauu… N-No… Ah… Uu… N, nn…!!”

Miyu desperately muffled her voice, climaxing with each thrust while bracing her arms to keep from collapsing. I loved her earnest effort, and seeing her like this, I decided to ejaculate. My mind couldn’t handle the pleasure of ravishing her any longer.

“Miyu… I’m gonna cum… Miyu…!”

I’d long passed the limit of holding back. Like a dog mating, I covered her from behind, thrusting into her feminine hole until the moment of ejaculation.

“Ah, ah… Onii-chan… Nnah… Uuaah… No, don’t… Ah… Aaaah, auuah…!!”

“I’m cumming… Cumming…!! Miyu, here it comes…!!”

Spurt, spurt, splurt, spurt, splurt—!!

Instead of thrusting deeper, I hugged her lower abdomen tightly as I ejaculated. The added external pressure on her already tight vagina made the sensation of semen passing through my narrowed urethra feel vividly raw.

“Ah, aah, naaah… Aah…!!”

Even after I finished ejaculating into the condom and stopped moving, Miyu’s climaxes didn’t subside.

“Nnah, hii, what’s this, aah… No… I’m cumming again…!”

She collapsed face-down on the bed, clutching her stomach and curling up, trying to stop the orgasms, but the aftershocks lingered.

“You okay, Miyu?”

“Haa, hauu… No… I’m gonna cum again… Ah, ah, my vagina… it won’t stop throbbing…”

Miyu twitched with small climaxes, and only then did the convulsions weaken. I lay on my side, snuggling close to her back to support her. She loves being hugged from behind, and now that sex was over, I thought it’d calm her.

“Did I overdo it?”

“It felt amazing, so it’s fine… but cumming this much was unexpected…”

Her voice softened as her climaxes finally subsided, though her hips still twitched.

“Ugh… I can still feel Onii-chan violating my hole…”

Miyu wavered between wanting to cum again and the embarrassment of climaxing in front of me. Rolling over to face me, she wriggled into my arms. Sensing she wanted to be held, I hugged her tightly, and she came one last time.

“Ugh… It was such a nice mood until halfway… What a thing to do to your sister’s first time…”

“I was doing my best to stay rational and not ravish you. So please forgive me.”

“Muu… Fine…”

I was somehow forgiven. When she’s this lenient, it usually means she enjoyed it wholeheartedly.

“How was your first time?”

“It felt insanely good.”

“What’d happen if I pounded you deep from behind?”

“Don’t ask. I don’t even want to imagine it.”

Miyu buried her face in my chest to hide. Based on past trends, wild breeding thrusts with my penis pressed against her cervix while ejaculating inside would be her ultimate pleasure. Add a loli costume and do it in front of a mirror, and her brain would drown in pleasure chemicals. That’d probably ruin her, so I won’t do it.

“Should we get dressed?”

“Yeah.”

I removed the condom and wiped our fluid-soaked lower abdomens with tissues.

“Ah, Miyu. Look.”

The tissue was stained red. On closer inspection, the condom’s surface was faintly red, too.

“Even Yuka bled despite all her toy play, so I guess I would, too. Gotta change the sheets.”

Looking around, the bed had several red stains. Fortunately, we’d pushed the bedding aside, so it was spared, but washing these heavily stained sheets would be a hassle. Replacing them might be easier.

We stripped the sheets, cleaned our bodies, checked for more blood, and got dressed. Miyu lay on the bare mattress, and I sat on the edge.

“Haa…”

Miyu sighed, exhausted. After cumming so much, she must be drained.

“I’m no longer a virgin.”

She stared at the used condoms lined up on the tissue. I lost my virginity a while ago, so I’m used to it, but the first time after sex leaves you with a strange, restless feeling—like nothing’s changed, yet something’s different.

Miyu picked up a tied-off condom, lying down and gazing at it absently. The translucent rubber held enough semen to fill a tablespoon.

“This came inside my vagina, huh?”

Miyu murmured.

She’d seen semen-filled condoms before, thanks to Sachiko and Yuka. But one ejaculated inside her vagina must feel entirely different.

“It’s got blood on it. And you came way too much…”

She examined it like a test tube, then quickly placed it back on the tissue and flopped face-down on the bed.

“I’m not a virgin anymore…”

Not wanting to interrupt the complex emotions swirling within her, I watched silently. Good or bad, she’d only feel this loss of virginity now.

“Onii-chan, Onii-chan.”

Miyu poked my waist, looking up at me.

“What’s your take on seeing your sister become a non-virgin?”

“W-Well, that’s a tough one.”

I wanted to say the sister lying here was a pure maiden who knew nothing of sexual pleasure until just moments ago. But after all the blowjobs, titjobs, and cosplay sex we’ve done, that feels a bit hollow.

“Being your first makes me happy and proud. It’s a special day.”

For a girl—especially this sister, who’s lived rejecting men—letting a man’s penis into her body was an earth-shattering event that shook her values.

Looking at this tiny lover, I felt an undeniable sense of conquest from marking her with my love. And the clever little devil behind it all sees through my feelings while loving and adoring me wholeheartedly. I love every part of Miyu.

“You’ve become even more special to me, Miyu. So much more.”

Miyu didn’t respond to my words. Instead, when I stroked her cheek, she gazed at me with clear eyes. It wasn’t a look of wanting something. Between us, as lovers, there was an unspoken bond that words couldn’t capture.

Following that invisible thread, I leaned closer to Miyu on the bed. We locked eyes until just before our lips touched, and only then did anticipation glimmer in her gaze. Feeling my heart pound, I gave her a gentle, pressing kiss.

It was still too early for dusk. The passion that had consumed us began to cool with our drying sweat. As our lips parted, the sound of fewer cicadas grew audible, like a volume knob slowly turning up. Instead of the setting sun, Miyu’s cheeks flushed faintly red.

“W-Wait, hold on. That’s… not fair…”

Miyu looked away, clutching a nearby pillow.

“You know, unexpectedly moaning or cumming during my first time—it’s so embarrassing, my self-esteem’s practically crumbling.”

Keeping her eyes on the bed, she shrank behind the pillow, hiding her sensual body.

“When my heart’s this unsteady, getting such direct affection from you leaves me defenseless, and I just… fall apart.”

Miyu used vague words to clumsily mask her shy embarrassment.

“What happens when you fall apart?”

When I asked, Miyu dropped the pillow, snuggled closer, and buried her face in my waist.

“Your sister reverts to her tsundere puberty phase.”

Her muffled voice answered. In short, nothing changes, but she’s embarrassed, so I should stop.

“I want to sulk, so give me a lap pillow.”

“Is that how sulking works? Fine by me.”

Miyu patted my knees like a dog begging for space, so I sat deeper on the bed and let her rest her head on my lap.

“It’s still bright outside.”

“Summer days are long. But it’s evening now, so it’ll probably get dark in an hour.”

“I see.”

With that, Miyu grabbed my hand, placed it on her head, and began to breathe softly, falling asleep. I hadn’t thought about it amid the heat of the moment, but for Miyu, who’d always avoided men, giving up her first time must have been incredibly nerve-wracking. The sex ended up being intense, so she was likely exhausted.

I stroked her sleeping head, pouring gratitude into comforting her. She always wants my hand on her head when we’re close, so she must love being petted as much as being hugged. At school, she’s treated as a lone wolf, so her silent demands for affection reveal her hidden desire to be spoiled by the one person she loves.

“Nn… Uun…”

Miyu nuzzled her face into my stomach, clinging so tightly I worried if she could breathe. But that position seemed to soothe her, and for about an hour, she slept soundly, looking content.

I kept stroking her head the whole time—occasionally poking her soft lips or lightly pinching her cheeks—and only noticed it was getting dark when Miyu stirred awake.

“Nn… I was sleeping…”

Her slurred voice, almost like sleep-talking, marked her waking.

“Morning. Sleep well?”

“I slept. What about you…?”

“Didn’t sleep, but I was healed.”

“That’s good.”

Miyu sat up, running her fingers through her hair to tidy it.

“I’m hungry.”

“Want me to cook something?”

“No, it’s fine. Times like this, we should just laze around together.”

Yawning softly with her hand over her mouth, she got off the bed.

“If one of us tries too hard, the other feels pressured, right?”

“Makes sense. Wanna eat out then?”

“Yeah.”

Miyu left the room with a relaxed gait, washed her face at the sink, and returned after minimal grooming.

“Let’s go.”

Wearing my oversized T-shirt and shorts, she signaled she was ready to head out.

“That outfit okay?”

“It’s fine today. You’re with me.”

“Fair enough.”

If Miyu didn’t care, I wouldn’t nag. I grabbed my wallet and phone, and we headed downstairs to the entrance.

“We’re not going far, right? Pretty much just the nearby gyudon place.”

“That gyudon spot is exactly the vibe.”

“Alright, let’s go.”

We slipped on sneakers and stepped outside.

“It feels different without the sun.”

We walked side by side along a block-fenced path. The air was still warm from the ground’s heat, but a passing breeze felt pleasant on the skin.

Maybe because of all the physical closeness earlier, Miyu didn’t cling to me, swinging her arms and walking a step ahead. …Until now, I’d always framed things in that order of thought.

“Miyu.”

Wanting to hold hands, I quickened my pace to her side and offered my hand.

“Hm? Should I hold this hand?”

Miyu smirked briefly, hiding her softened expression, and asked teasingly.

“Would you?”

“Sure. You and I are super lovey-dovey, right?”

“Yeah. Well, of course.”

Her sudden bold line made even me blush, and I pointlessly stared at a street sign. My face felt hot despite the summer air. Miyu smiled, teasing me. As we walked, the sun sank, and only streetlights and house lights illuminated the night path.

Miyu’s hand was small.

“First time holding hands like this. And going out together.”

“Today’s full of firsts. A celebratory day.”

“Gyudon was really okay?”

I asked seriously, but Miyu just said, “That’s why it’s perfect, Onii-chan,” with a dramatic flair, not elaborating. She was telling me to figure out the obvious meaning.

“Will eating gyudon help me understand what you mean?”

“There’s a chance.”

At the restaurant, the automatic door opened as we stepped in sync. We ordered two of the cheapest gyudon at the ticket machine and sat side by side at the counter.

Beef doesn’t have brain-boosting nutrients, but if there was a chance, I had to try. After a two-minute wait, the gyudon arrived—ordinary beef on a familiar bowl.

“Itadakimasu.”

We ate normally. No new eating techniques, no lively conversation—just me watching Miyu, who held her chopsticks properly as always, bring rice and beef to her mouth. The uncrowded restaurant had no chattering patrons, only a broadcast about an anime collab and background music.

“Tasty?”

“Decent.”

“Right?”

Miyu deftly picked up some rice with her chopsticks, chewing with a straight face. She didn’t act grateful for cheap gyudon, looking no different from our usual meals at home.

But, yeah. Miyu’s in casual clothes. With just her hair brushed, anyone could tell she’s a local out for a quick errand. To those seeing us as a couple, not siblings, we’re two people who’ve gotten that close to come out so casually dressed.

“Go chisou sama.”

The meal was over. Miyu set down her chopsticks, clasped her hands, exhaled a “fuu,” and turned to me.

“Ready to go?”

In the end, we just ate gyudon. But we’re mutually in love, and we wordlessly agreed to take a slightly longer route home. We love each other, so we made love.

“We’re a pretty close couple, huh?”

Miyu’s choice to cap her first time with a nearby gyudon run was to make me realize what’s truly changed in my life. We’d already shared a deeply special moment in bed. What we needed was normalcy, not elaborate home cooking or a fancy restaurant. In a tense, formal setting, this feeling would’ve been buried in the occasion.

“Oh, so you’re such a natural pervert that you’re this romantic even post-sex?”

“Wait, I thought I said something kinda sweet!”

There was a huge gap in our vibes. Where did I go wrong?

“Let’s have a literature class. What kind of day was today for you, Onii-chan?”

Walking down the darkened street, Miyu moved her index finger like writing on a chalkboard.

“Straight answer? The day I took your virginity.”

“Nope, wrong.”

“Uh, this is a literature class, right?”

If it’s literature, it’s one of those “describe the character’s feelings” questions with ambiguous answers. Would Teacher Miyu give me such a tricky problem?

“Think from the questioner’s perspective.”

The questioner—meaning Miyu. I need to consider what today was from her standpoint, with me as the subject. For her, losing her virginity was the biggest event. Framing it as what I did to her, the answer was in her words.

“The day I made my sister a non-virgin.”

“Exactly. I was just made a non-virgin by Onii-chan.”

“Uh, yeah.”

Her phrasing stirred some guilt, but recalling today’s events through that lens gave the memory a different flavor.

This tiny sister, walking hand-in-hand with me so closely. This long-haired, refined loli beauty with a straight posture and cool expression—I was thrusting my penis into her hole just earlier, making her moan wildly.

This sharp-tongued, composed sister, who eats elegantly at a gyudon joint without making a sound, turns into a beast of lust when stripped, leaking love juices and making wet noises during sex. Those traits, unnoticed in daily life, became starkly vivid when recalled in this ordinary setting, highlighting their perverse allure.

“You’re right, ‘taking your virginity’ sounds too cute for what happened…”

“Don’t think I forgot you forced me from behind at the end.”

“S-Sorry. Got carried away.”

While we became a close couple, the sex had a strong element of me claiming Miyu. She’s complaining now, but during sex, she’d let me do anything. Maybe, like the unseen bond between Miyu and Yuka, our lover-like ritual is “having lustful sex and getting scolded by Miyu later.” Acknowledging that today makes it a milestone in our relationship’s growth.

“Hey, Onii-chan, how many condoms do you have?”

Miyu asked just after we passed a convenience store, glancing at it.

“Two.”

“Two boxes?”

“No, two uses.”

Her question about boxes tipped me off to what was going through her head.

“Not enough?”

“Hmm… I wouldn’t say that.”

“I keep it low on purpose for self-control. If I had more, I’d probably use them all.”

“Smart choice.”

After that, we stopped walking.

“So, what now?”

Miyu asked.

“Tonight’s probably too much for both of us. Will two be enough for tomorrow?”

“I’ll… go along with your libido.”

That was a wild thing to say so casually.

“I’ll definitely want to, but like I said, too many might lead to overdoing it.”

“Right. Yeah, I think fewer is better.”

With that settled, we started walking again.

Three minutes later, we were back in front of the convenience store.

“Should we buy some?”

“No, I just meant it’s hot this time of year, so going out to buy them later would be a hassle. Since we’ll probably want to do it anyway, might as well grab some now to save trouble.”

“Oh, got it. Well, we can order online these days.”

“Right. Then maybe we don’t need any.”

After coming back, we reached the same conclusion. Having decided not to buy, we should’ve headed home, but for some reason, we lingered.

“Even online, if we really want to do it a lot before delivery, we’d hesitate about going to buy more.”

“Yeah. But I limit the number so we can pause when we want to do it a lot.”

The discussion looped back. But Miyu seemed anxious about only having two condoms, so maybe I should address that. Doing it raw because we ran out would be the worst.

We don’t know how our sexual instincts might escalate, so routinizing our urges to some extent might be safer.

“Just in case, should we buy one box?”

“If you say so, I won’t stop you.”

For some reason, rational Miyu was worried about the condom shortage, so we entered the convenience store.

As usual, we picked thin condoms and had a hushed discussion.

In the end, following Miyu’s advice that “it just so happened that’s all they had left,” we bought two boxes and headed home.