My Little Sister Is the Best F*p Material

Volume 7 Chapter 08: My Sister Wants to Get Pregnant with My Sperm: Our First Creampie Sex

The elevator to the spa’s private room floor was empty except for us, leaving Miyu and me alone.

“This quiet makes me want to do naughty things.”

Miyu tugged my yukata sleeve, looking up with a suggestive expression. I agreed, but a security camera prevented any open fooling around. Even with my sister panty-less under her yukata, a bandage over her privates, I couldn’t act freely.

“If you lifted your yukata, I’d see something thrilling.”

The camera was behind us, so facing the door, a quick flash might be safe.

In the rising elevator, we had about ten seconds.

“Will I get something good if I show you?”

Already in erotic mode but hesitant, Miyu asked.

“I’ll have more cum to fill you with.”

Her fingers twitched—a reward she’d love. Despite her embarrassment, her hand slipped into her yukata’s gap.

In the humming metal box, glancing at the rising floor numbers, she slid her fingers under her obi.

“Just for a second.”

Feigning reluctance despite her initiative, she agreed.

As promised, it was less than a second. Parting her yukata like a curtain, her bare legs and peachy privates peeked out, a beige bandage along her slit.

I swallowed hard, my throbbing erection pulsing. The bandage, grayed by her wetness, looked ready to peel off, overwhelmed by her juices.

Seeing her privates was exciting enough, but in public? Watching my sister grow lewder filled me with indescribable satisfaction.

“Satisfied?”

Shyly releasing her yukata, she asked.

“Beyond satisfied. I’ll thrust into you the moment we’re in the room.”

As her loving brother, I had to reciprocate.

“It’s a promise.”

Linking pinkies instead of holding hands, she turned away, hiding her flushed, aroused face.

The doors opened, and we hurried to our reserved room. A keypad required the booking code.

“The number is…”

Fumbling with my phone for the screenshot, I struggled with the six digits, my excitement making my fingers clumsy, hitting clear repeatedly.

“Hurry, hurry.”

Too eager for sex, Miyu slipped her hand into my yukata, stroking my penis.

“Hey, stop.”

“The camera’s behind us, so it’s fine. You’ve gotta show me too, right? Fair’s fair.”

She yanked off my obi. My yukata fell open, exposing my erect cock.

“Someone might see if you don’t hurry.”

“You little…”

Enduring her teasing handjob, I entered the code and scanned my wristband. The lock clicked, and I pushed Miyu inside before following.

The entryway had a large shelf ahead, a scroll on the left, a sliding door on the right—likely where food orders would be placed. Curious about the room, I prioritized sex.

Lifting Miyu’s yukata from behind, I rubbed my penis against her crotch. The bandage blocked entry.

“Don’t tease me…”

Gripping the shelf, she swayed her hips, urging insertion. It’d been a while since we’d had sex. Despite the Yamamoto-san reconciliation, I’d relied on masturbation too long.

“You’ve gotta make it so I can enter.”

I kept rubbing her bandaged slit. This wasn’t just for my release—Miyu craved being filled. Her desire outweighed mine.

“You promised to thrust in right away.”

“That’s why we’re in position without going to the main room. But your bandage is in the way.”

“Ugh… you told me to put it on…”

Her hand crept toward her crotch. She knew she was being unreasonable. I’d made her apply the bandage, but it wasn’t just that. Miyu, who firmly says no to dislikes, was submissive—not just from arousal.

She knew it too. The bandage wasn’t just my demand; she wanted this naughty act. That guilt made her comply. This exchange was her admitting she’s a lewd girl.

Pouting but prioritizing desire, she silently peeled off the bandage, its adhesive weakened by her juices, and placed it on the shelf, her eyes begging for no more waiting. I couldn’t deny her effort and thrust my bare penis into her vagina.

“Hngh… ah, ah…!!”

Gripping her arched waist, I pinned her as I sank in. Her thick juices, held by the bandage, enveloped my raw cock, spreading warm pleasure. I nearly spilled inside.

“All the way in…!”

Her tight vagina, even tighter from the break, clung as I pushed in, her folds squeezing like they were wringing me out.

“Agh… ahh… hng, so good… no, ahh…!!”

Inserting slightly deeper made her writhe. My penis reached her sensitive cervix.

“Nn… ah… Onii-chan… feels so good… aahh…!!”

Accepting her brother’s raw cock, she couldn’t stay sane. A few strokes sparked her eyes like fireworks.

I planned shallow thrusts to ease her in, but reaching her depths so easily? Her cervix was already lowered.

“Such a lewd sister…!”

No holding back—I thrust to the hilt. Smacking her ass, I made her stand firm, then unhooked her bra. Her breasts spilled out, and I groped them while pounding.

“Hau… ahh… Onii-chan… ugh, ahh…!!”

“Miyu… feels amazing, but… keep your voice down…!”

This floor was packed with rooms; we were by the door—screaming would be heard.

“Impossible… ahh… feels too good… can’t…!!”

She couldn’t stay rational during our long-awaited raw sex. Her adorable chaos kept me thrusting.

“Ah… ahh…”

Pounding from behind, she climaxed repeatedly, collapsing from muscle fatigue.

“Haa… I’m done for…”

Panting, she leaned on the shelf’s middle tier. We paused.

“I haven’t cum yet.”

Teasing, I saw her guilty, teary eyes look up. I shouldn’t bully her.

“Let’s continue inside.”

Pulling her up, I slid open the door. An eight-tatami room had a square wooden table with four chairs, a tablet for ordering, a water pitcher, and a tea set. No bed—tatami for lying down, but not ideal for sex.

“Miyu, sit on the table’s corner.”

“Here…?”

She perched on the edge. Kneeling in front, my penis aligned with her entrance.

“What’s wrong?”

Both in disheveled yukatas, she stared at my erect cock.

“N-Nothing… just, this huge thing was inside me…”

Measuring it with her finger, then pressing it to her stomach, she realized how deep it went in her small body, withdrawing her hand regretfully.

“You were moaning like crazy when it was in.”

She covered her face, shaking her hair. “No, don’t say that…!”

Teasing my pure yet lewd sister was fun, but I wanted sex more. Kneeling before her, I prepared to enter.

On the corner, her legs spread naturally. Leaning her back, I touched my penis to her glistening entrance.

“Ah, wait, what’s this…?”

“This angle gives a great view of it going in, right?”

“It’ll drive me crazy if you make me watch…!”

Despite knowing herself well, Miyu couldn’t tear her eyes away from where we’d join. I pressed my penis in regardless.

“Fua… ah… it’s coming… nn…!”

Her petite frame and smooth, glossy privates looked almost pre-pubescent in isolation, and sliding my raw cock into that thin slit brought near-euphoric pleasure.

Her juice-soaked flesh swallowed my shaft mechanically, reminiscent of when Miyu used to give expressionless blowjobs while savoring her brother’s cock. The sight must have forced her to empathize, like it or not.

“No… nn, ah…! So… embarrassing… nn, yah, aahh…!!”

Even as she covered her eyes in shame, I continued slow insertions. Miyu could feel my cock inside her with fingertip-like precision. For her, the raw friction of flesh must be overwhelming.

“Ah, ah, ah… nnaah… aah…!!”

My upward-curving erection pressed against her G-spot with every frontal thrust, making her jump and moan at the moment of contact—a sight I adored.

Miyu would never fake pleasure. Yet, spreading her legs and trembling uncontrollably was proof she was helplessly consumed by it.

“Ah… ah… no… aauu… feels good… nn, aaagh…!!”

With each five-second stroke, I felt her folds catch my glans, tormenting her with sticky, slow sex. Slowing further, I stopped, letting only my twitching cock stimulate her.

“Nn… nnh…!!”

Pausing to let her recover, I turned her stamina into teasing tension. I removed her half-off bra, sliding it off each arm, and kneaded her breasts, which seemed to have grown again recently.

“Auu… ah… aah…”

Miyu let me grope her without complaint. Lately, she didn’t mind unpermitted touching. Once accustomed, this sister would let me do anything.

“Onii-chan…”

She placed both hands on her stomach, tracing where my penis’ tip rested, as if gauging its depth.

“Where’s your womb at?”

I asked out of curiosity, unaware it was dangerous information for her to share.

“Um… below my navel… when it hits there, my head goes all fuzzy…”

She pressed her middle fingers lightly to indicate the spot, forming a heart-like shape where her womb’s entrance lay.

“Then I’ll aim my cum there. Keep marking it.”

“Fue… ah, aah… nn, aaah…!!”

I gradually sped up my thrusts, shifting to ejaculation mode. Ensuring my tip hit her marked spot, I moved gently, our parts kissing like pecking birds.

“Aah, nn, no… ah… I’m going crazy… aahh, hyaan, uuaah…!!”

Her body convulsed with waves of pleasure, breathing labored, chin raised, yet her hands stayed on her stomach, guiding me to her womb. Despite the torment, her brain craved more stimulation, seeking no escape.

“Miyu… Miyu…!!”

Her vagina felt so good I could’ve cum instantly, yet I held back. Perhaps her instinct craved my seed, but her rational side, wanting more pleasure, restrained my release.

“Ah, aah! Onii-chan…!!”

But the limit was reached. Semen surged from my balls, the intense urge to ejaculate hitting hard—a clear demand from Miyu.

“Miyu… I’m cumming…!!”

Thrusting fiercely, friction sparking my brain, I pressed my tip against her womb and released. Thick streams burst through, three days’ worth flooding her womb like a clamped hose.

“Higyaaaah…!!”

With a scream-like moan, Miyu froze, gazing at the ceiling in ecstasy, her body limp. Her tight flesh, clinging like a condom, left a hollow when I pulled out, leaking white fluid like drool.

I’d finally creampied my sister. The realization brought joy, excitement, and a lingering, aimless guilt.

“Miyu…”

In a haze, possibly from the massive release, I leaned over her. Guilt wasn’t quite right—maybe immorality or regret. That very feeling fueled my arousal.

For Miyu, who desired a sibling-lover bond, this was the ultimate sexual pleasure. I agreed and lately considered joining her fully.

Did I need to seek “girlfriend vibes” with her?

“Onii… chan…”

Miyu called in a sleepy mumble.

“How do you feel?”

Her unfocused eyes turned slightly toward me.

“Like I’m underwater… so quiet, calming…”

Half-open mouth, slurring, she seemed half in another world—a risky state.

“My body’s floating… only my stomach tingles… feels good… nn, nn… ah…”

Her abs spasmed, semen gushing from her privates, spreading on the table.

“Your sperm… so much in my womb… ah, aah… nn…”

Even after pulling out, she kept climaxing, an unbelievable amount of semen flowing. Her pristine, smooth skin was a mess, and I found it insanely arousing.

“Miyu, I’m right here.”

Wiping her tear-streaked face, I kissed her lips.

“Nn… fua… Onii-chan…”

She smiled faintly, finally looking at me, consciousness returning.

“No strength… help me up.”

“Got it.”

I pulled her up, draping her half-off yukata over her shoulders.

“Hyah… what’s this…?”

Realizing she’d been spread-eagled, leaking copious semen, she flushed with shame.

“That’s what creampies do.”

“Ugh… wipe it before I notice…!”

Curling up on the table, she hid in her yukata. I wiped the mess with tissues, planning to bag it for disposal elsewhere.

“Thought you should feel the raw reality.”

I half-wished I’d taken a photo.

“No need… I can feel your cum in my stomach.”

Saying so, she pouted, embarrassed by her own words.

“It looked like a lot came out, but still more inside?”

“Plenty’s still there.”

Trying to get off the table but worried about leaks, she froze. Only one solution.

“Another bandage?”

I held one ready.

“You love these tacky things, huh?”

“Don’t say that.”

A bandage on her slit was tacky but practical. She spread her legs, wiping the surface. Once accustomed, she resisted less. Post-creampie, her shame eased, letting me apply it without protest.

“Um, Onii-chan… there’s a closet here.”

Standing, or perhaps noticing earlier, she pointed out a closet left of the sliding door, overlooked initially. Inside were bedding sets—sleeping was an option.

“You’re tired, so let’s set up the futon.”

Moving the table, I laid out one futon for Miyu. While she rested, I bagged the trash.

“…What’re you doing?”

While I wasn’t looking, Miyu lay prone, hips raised, wiggling side to side. Was she teasing?

“Thought this might help your sperm reach my womb.”

Sober but still lust-addled, she seemed to enjoy the bandage more than I did.

“Does that work?”

Finishing the trash, I joined her.

“Probably not, but imagining it’s hot.”

“Got it.”

My sister had a full-on ero-manga brain. She must’ve felt my cum flood her womb during the creampie.

“Nhehe.”

Grinning uncontrollably, she rubbed her stomach, thrilled by the creampie.

“Full of your sperm…”

Rolling onto the futon, uncaring of her loose yukata, her toned waist looked soft. Her flawless stomach made her smooth privates stand out, tempting me to touch.

“Nn… ah…!”

Unable to resist, I touched her stomach, making her abs spasm and moan.

“S-Sorry.”

“Your deep cum made my stomach sensitive!”

“I’m sorry.”

Not really, though.

“Your fault I’m all horny again.”

Miyu stared at me with pleading eyes, a classic sibling squabble.

“Your lewd moans are making me horny too. Let me suck your breasts as an apology.”

“You’re the reason they’re getting bigger!”

“Doesn’t matter if they’re H-cups. You’re lewd anyway.”

“I’m not lewd! And apologize to all H-cups out there!”

Our back-and-forth banter. But Miyu clearly wanted lovey-dovey intimacy, which required naughty contact, so I couldn’t back down.

“Miyu, listen closely.”

I leaned over her, hands by her head.

“There’s no way a beautiful G-cup schoolgirl who loves her brother isn’t lewd.”

“That’s harsh defamation…!”

It felt like a fair judgment, though.

“…So, how should this sister take responsibility?”

Despite her reluctance, she looked up guiltily. Lately, showing her aroused side more often, she couldn’t fully deny being a lewd sister.

“Just soothe your brother’s pent-up desire.”

So, I’d suck her breasts. As I lowered my lips to her perky nipples, she covered them in a last-ditch effort.

“What about my defense that you’re the one making me lewd?”

“Not listening.”

Pinning her hands to the futon, I latched onto her breast.

“Ah… ihya… aahn…!”

Sucking and licking her nipple, she moaned wildly, tensing her thighs to handle the pleasure.

“Churu… nn… aah… Miyu… so exciting…”

“No… hya, stop… like a baby… ahn… don’t suck…!”

Her high-pitched moans as I licked made my erection unstoppable. Sucking her plump breasts, knowing they were my sister’s, drove me wild with arousal.

“Mnn… haa… Miyu…!”

Releasing her hands, I kneaded her other breast.

“Nn, ah, Onii-chan… embarrassing… uuh… ah, nnaah…!”

Even with free hands, she didn’t push me away, wrapping her arms around my back, comforting her breast-sucking brother. Her kindness, our sibling love expressed.

“No, Onii-chan, wait… ah, aah… my crotch… the bandage’ll come off… nn, ah…!”

Too much stimulation softened the bandage with her juices. If it came off, the semen inside might stain the futon.

“Nmu… fuu. Guess the bandage isn’t much use.”

Pulling away from her breast, I pondered. Another bandage would just fail again, and now, horny as we were, it was a hindrance.

“Should we get all the semen out?”

“How?”

She asked, conflicted—wanting to keep it but hating to miss out on more sex.

“Kneel on the table. Use a chair cushion if it hurts.”

“The hard surface doesn’t bother me. Kneel here?”

Crawling onto the table, she sat on her knees, then stood on them. Her untied yukata parted, exposing her full breasts and smooth privates.

“This feels… super naughty…”

Muttering, she crossed her yukata.

“Your lewd look is the cutest in the world. Don’t hide it from me.”

“Ugh… even if you say that…”

Already aroused from lying on the futon, she couldn’t easily refuse my naughty request. Lately, she’d grown more open to showing her erotic side. Since yesterday’s mischief, it seemed her cool facade was melting through sex, revealing her desire for intimacy.

“Please. I want to get horny seeing your naked body.”

“Ugh… if you insist…”

She let go of her yukata, exposing herself again. Such an obedient girl.

“It’ll be easy to wipe if semen drips. Peel off the bandage and press your stomach.”

“…Okay.”

Removing the bandage, her twitching slit, stimulated by my gaze, leaked juices.

“It’s been a while, so there might not be much white stuff left.”

“Then we don’t need to worry about leaks. Let’s check.”

“Okay.”

Breathing deeply, she pressed her stomach, tensing slowly. Her trembling muscles worked to push out the semen. Watching her effort, my penis throbbed with excitement.

“Not much coming out…?”

“But there’s still a lot inside, right?”

“Should be.”

Maybe the semen’s viscosity was too high to push out. Her vagina might be designed to hold it, making simple pressure ineffective. When she climaxed on the table, it flowed out, suggesting vaginal contractions might trigger it.

“Miyu, I’ll touch your stomach again.”

“You’re pressing?”

“Not exactly.”

To induce contractions, just arousing her wasn’t enough—something more was needed.

“Um… cum for me.”

Struggling for words, I settled on the blunt truth, circling behind her with a gentle plea.

“What should I say to that?”

Blushing slightly, she looked down.

“I’ll touch you even if you refuse, but nodding would make me happy.”

I’d always made her climax on my whim, like with Sachiko or Yamamoto-san—girls climax from a man’s arousal. If Miyu chose to cum for me, it’d be thrilling beyond words.

“Um, then… okay. I’ll cum…”

Mumbling barely audibly, she spread her yukata. Her erotic pose nearly pushed me to ejaculate, but I held back, reaching around to touch her stomach.

“Nn, nn… aah… it’s… intense… ah…!”

My touch triggered climax-like spasms, making her wobble. Supporting her from behind, I kept her legs spread, waiting for the semen to flow.

“Ah… hyaa… nn, aah… Onii-chan…!”

Unlike usual foreplay, I didn’t tickle her skin but pressed her womb’s marked spot, stroking downward to her slit.

“Nnn… haa… hiaaah… ah… guh…!”

Writhing under waves of orgasms, her legs trembled. She instinctively tried to cover her crotch.

“Hya… no, it’s… coming out… ah…!”

Drip, drip—diluted semen trickled from her slit. Feeling like she was wetting herself, she tried to cover up, still writhing under my stimulation.

But it was just a gesture. Her body, overwhelmed by pleasure and leaking, ignored her faint rational signals. As I stroked, she exposed her privates, spilling semen relentlessly.

“Miyu, it’s pouring out.”

“Aa, uuh… this… no good… ah, ah…”

The semen spread across the table, and when no more white fluid dripped, I released her, pulling her back to sit without stepping in it.

“Haa, haa… I can never have sex with anyone but you…”

Seeing the semen, she realized she’d exposed an intimate side only to me.

Was this “training” a girl? Surrounded by experienced girls, I hadn’t felt development’s joy. Watching Miyu take my color filled me with unique pleasure.

“No one else from the start.”

Having cut sexual ties with Haruka, and only allowing her brother’s touch, Miyu was bound to me forever—her body couldn’t get lewder.

“By the way.”

Showing my erect cock to the exhausted Miyu on the table.

“Your fault it’s like this again.”

Despite satisfying myself with her creampie, my cock burned with animalistic desire.

“Can I creampie again?”

“I just cleaned my stomach.”

“…No good?”

“…Not no good.”

As if saying, “Use my body as you please,” she offered herself openly.

Our second creampie sex loomed. As our passion ignited, my phone’s alarm blared, echoing in the room.

“Damn it.”

This room was rented for exactly one hour. Extra fees were fine, but with bookings tight, cleaners might enter.

“Five minutes left.”

“Fue…!?”

Miyu’s eyes widened, shocked. Her seduction plan ruined.

“Do it quick?”

“Want to… but…”

Sadly, my quick climax could finish in five minutes, but rushing our first date’s sex didn’t sit well with her.

“Well, you came a lot, so maybe you’re satisfied?”

Her stamina might not hold up anyway.

“You only came once—how could I be satisfied?”

Jumping on me, she spouted nonsense.

“My problem?”

For semen-loving Miyu, my ejaculation mattered more than her climaxes. I’d fulfilled my duty with that massive creampie, though.

“Your sister’s body can’t be satisfied unless you cum a lot.”

It wasn’t about her climaxes or semen volume—she just wanted me to ejaculate. Flattering, but reckless optimism might lead to trouble.

“I already spilled plenty.”

Pointing to the milky puddle on the table, I tried convincing her. With Yamamoto-san, I held back using Miyu as fantasy, but with Miyu, there were no limits.

“No, no, you gotta cum more!”

Pushing me onto the futon, she stared with childlike eyes, rubbing my penis. My sister had entered a tantrum phase.

“M-Miyu… when it comes to sex… you get so clingy, it’s unreal…”

“When my lust spikes, I become your clingy sister, so deal with it.”

Staring into my eyes, she kept stroking. True to her clingy mode, she had no hesitation teasing her favorite part. Her rough strokes weren’t enough to make me cum, but they overwhelmed my aroused body.

“Waiting till we’re home… too long, huh?”

“Yeah.”

The train ride and hour-plus trip home loomed.

“Then… a love hotel after this?”

I’d fantasized about it, but didn’t expect it so soon.

“Let’s go.”

Instant agreement. No time to fret over “girlfriend vibes”—we just wanted sex, hopping from one private room to another.

“Also, Onii-chan.”

“What…?”

Still rubbing my cock, her hands slick with precum, she kept making wet sounds.

“Today, I’ll probably be like this all day, so keep up.”

Licking the precum off her fingers, she smiled. “Keep up” meant “cum tons for your sister.” At the love hotel, I’d be ravaged while cumming repeatedly. Ejaculation hell was confirmed.

“Go easy on me.”

In full brother-loving mode, she nuzzled my head, obligating me to stroke her hair. I mused dangerously about creampie-ing her into unconsciousness.

“Onii-chan.”

She called in a slightly higher pitch.

“What?”

Beaming, she said, “Being with you is so much fun.”

It was her honest feeling, unclouded by past worries, shining through in this moment.

“Love you.”

Her pure, clear eyes spoke volumes.

“You’re my favorite in the world.”

I couldn’t betray my adorable sister’s expectations. Resigned to potential exhaustion, I vowed to give her all my energy.