How Using My Oppai Skill to Enlarge My Sister’s Breasts Led to Building a Harem - Chapter 37.3

Chapter 37.3

As Riria and I grew closer, our sexual chemistry skyrocketed, elevating her to a level of feminine refinement far beyond when we first started making porn.

(She’s too damn cute… Riria.)

Even viewers could tell. Our videos racked up insane view counts, exploding in popularity.

“Haan♡ Cock… Feels so good~~~♡” Riria moans.

“Riria, slow down…! Yukino, how’s it going?” I call out.

“Just a sec… Changing the battery,” Yukino replies.

Bottomless stamina and lust, amplified by my ability to awaken every erogenous zone—Riria’s unlocked her full potential. Filming on weekends and posting weekly, our follower count’s been soaring.

“Getting paid to fuck the guy I love? Total bliss~~~♡”

That’s Riria’s new catchphrase, and I couldn’t agree more. Showing off my gorgeous girl while making bank? It’s a dream come true. We’ve been hooked on filming ever since.

Then one day, Riria drops a weird bombshell.

“Me… with the sexy actress Hoshizora Rei-san?” I repeat, stunned.

“She wants to meet you,” Riria says.

Hoshizora Rei—a name even I know. A busty superstar, always topping the charts, the real deal.

“That Hoshizora Rei-san…” I mutter.

“You know her?” Riria smirks.

Well, I was a virgin a year ago. Age restrictions kept me from buying her stuff, but as an oppai fanatic, how could I not know her? My “son” got plenty of action thanks to her back then.

“Yeah, kinda… But why’s she contacting us?” I ask.

“She’s my friend’s senior’s acquaintance,” Riria explains.

Riria’s network is wild—gals, girls dabbling in shady stuff. Our videos are sold through those connections, and now Rei’s reached out, curious about us. She wants to meet, no names needed.

“You going?” I ask.

“Nope, she only asked for you,” Riria says.

“Huh?” I blink.

Apparently, I’m the only one invited. Odd, but the chance to meet a beauty I used to jerk off to has me buzzing with excitement I can’t hide.

“So, that’s a yes, right?” Riria grins.

“Hey, I didn’t say anything…” I protest.

“With your cock pitching a tent like that, I don’t need to hear it♪” she teases, rubbing my bulge through my pants.

“…” I’m speechless.

The groin speaks louder than words. Someone should make that a proverb, I think.

※

Before I know it, the meeting day arrives. I step into the restaurant where Hoshizora Rei awaits.

(No customers… Wait, just one…)

“Nice to meet you, Hoshizora-san. Did I keep you waiting?” I greet.

“Oh… Hmm, I see…” she murmurs, sizing me up.

“Is something wrong?” I ask.

Hoshizora Rei, in person, is a blonde bombshell in a flashy, revealing dress, her features strikingly perfect.

“Sorry, you just look younger than I expected,” she says with a smile.

“Ah…” I nod.

“Anyway, I booked the place out. Why don’t you sit?” she suggests.

“Sounds good. Excuse me,” I say, taking the seat across from her.

Up close, I take in her presence.

(Such raw sex appeal… This is a top actress.)

In pure beauty, Ayaka-san or Miyabi-san might edge her out. But Rei’s honed her feminine allure to a pro level, exuding a devilish charm that pulls men in.

“You’re quite the catch… How old are you?” she purrs.

“Uh… Seventeen,” I answer.

I’m keeping my identity under wraps, but age seems safe enough to share.

“Really… Well, order whatever you like. Let’s chat over food,” she says.

“Sure—” I agree, ordering some meat dishes from the waiter and listening as she dives in.

“You’ve been blowing up lately, haven’t you?” she observes.

“Huh? Nah, I’m not doing much. It’s just the girls being cute,” I deflect.

Even with blurred faces, Riria’s charm carries the videos. I’m just the guy in the background.

“Hmm. That girl’s got something, sure. Your girlfriend?” she probes.

“…Kinda,” I hedge.

My love life’s a tangled mess, so I dodge, but Rei doesn’t seem to care.

“Changing topics—what do you think a porn actress needs most?” she asks.

“Uh… What’d that be?” I fumble.

Too vague for me to answer.

“To me, it’s not getting stale,” she says.

“Yeah, that makes sense,” I nod.

One-hit wonders are fine, but to keep going, you can’t bore your audience.

“But it’s hard for an actress to solve that alone,” she continues.

“Really?” I ask.

“Yup. Same old scripts, same old partners—everything ends up feeling repetitive,” she explains.

“True,” I concede.

A fresh concept grabs attention, keeps people curious about what’s next.

“That’s where you come in,” she says, her eyes glinting.

“???” I tilt my head.

“I saw it when I watched you,” she clarifies, her gaze raking over me like I’m prey.

“Even without fancy setups, the girls in your videos keep getting more captivating,” she says.

“That’s…” I trail off.

My special ability’s at play, but I can’t exactly admit that.

“You’re a gem. You’ve got talent,” she declares.

“Wha…!?” I gape.

Is that a compliment?

“Talent?” I echo.

“Yup, especially that cock of yours,” she says bluntly.

Well, it is pretty big, I guess. But calling it talent? That’s a stretch.

“I’ve never seen a dick that enslaves girls like yours, no matter how many times you go at it,” she marvels.

“…” I’m at a loss.

I’m just enjoying sex, nothing more.

“So, today—I’m here to find out for myself,” she purrs.

“Find out…?” I ask.

“Sex♡,” she says, her voice dripping with intent.

Rei’s goal—my body.

※

She drags me to a hotel she frequents, and we take turns showering.

(Never saw this coming…)

As I rinse off after her, I try to process. From what I dug up, Rei debuted three years ago at 20 (officially), dominating rankings. Lately, though, critics call her work stale, and her popularity’s dipping.

“So that’s why me…?” I murmur.

Her earlier words hinted at desperation—a fierce drive to avoid fading out. Maybe I should help her out, I think.

※

“Tada♪” Rei announces, stepping out.

She’s in leather gloves and a harness, straight out of an SM flick, flaunting her stunning body without a hint of shame.

“That’s some outfit… Everything’s on display,” I say, stunned.

“Fufu, I got it just for you. Like it?” she teases, pushing her massive J-cup breasts together provocatively.

It’s the Rei from her videos, radiating raw eroticism.

(Big areolas, but a gorgeous pink…)

Preferences vary, but I think big areolas suit big oppai—small ones throw off the balance. All oppai are sacred, of course.

“Beautiful… Really,” I breathe.

“Fufu, hearing that from a young guy makes me happy♪” she beams.

She’s only 23, per her profile, but I keep that to myself. My groin’s already reacting, lifting part of my bathrobe.

“Nice…♡ Show me,” she urges.

“Y-Yes…” I stammer.

Sounds like a virgin, but my cock’s no pushover.

“No way…” she gasps.

I shed the robe, revealing my erect cock, swollen from her oppai.

“A Japanese guy with a cock like this…?” she marvels.

“Huh…?” I blink.

“This thickness, length… That ferocious look…♡ You’re really 17?” she asks, incredulous.

“Hey, Rei-san…!” I protest.

She stares, possessed, stroking my cock to test its heft.

Sniff… “Ahh… Such a lewd scent… Haa… Nn♡,” she murmurs.

“Aren’t you used to this stuff?” I ask.

“No way…” she denies.

Apparently, my size is top-tier even globally.

“And you’re still growing? That’s terrifying…” she says.

“Uh,” I mumble, lost.

(Bigger than this? I’d be in trouble…)

I want to fuck all kinds of girls. A cock too big for petite ones would be a problem.

“Uh, shouldn’t we…” I start.

Enough teasing—my limit’s near. My groin’s been throbbing, desperate to plunge into her pussy.

“Right…♡ Go ahead,” she purrs.

Lying sideways on the bed, she lifts a leg, spreading her pussy with her fingers.

(This is Hoshizora Rei’s real pussy…!)

The idol of men nationwide, the woman I’ve fantasized about—her lascivious pose ignites a primal urge deep in my hips. Swallowing hard, I press my glans to her entrance—

“Here goes… Hn!” I grunt.

I thrust my cock in one go.

“Auu♡ No way… Khiii~~~♡” she cries.

Fueled by her teasing, I pound her pussy relentlessly.

Dochu!! Dochu♡ Dochu♡ Dochu♡ Dochu♡

“Wait… Slow down~~~♡ Aan♡” she pleads.

“Hn! …Hn! Hn! Hn!” I ignore her, hammering her depths.

Her seasoned vagina takes my rough pistoning without pain.

“Here’s your sweet spot, Rei-san…! Hn!!” I target.

“How… Ooo~~~♡” she wails.

Actress or not, her body’s no different. Once we’re joined, her weak points are crystal clear.

Dojun! Dojun! Dojun! Dojun—Dojun♡

“How’re you so good…?! Ooo~~~♡” she gasps.

Well, I fuck daily. I’ve learned what angles make girls feel best, my body memorizing the moves.

“Hn! Hn! Your pussy’s… amazing!” I praise.

“Ooon♡ I’m… a pro, after all♡” she boasts.

True—she’s feeling it, moaning dramatically, but she’s got room to spare.

“Impressive… Then I’m going all out! Here—here!!” I declare.

Her confidence sparks a challenge.

“Nooo~~~♡ No way, this…!” she cries.

Using my “gifted” cock to the hilt, I slam zunzun♡ into her core.

“Nghiii~~~♡ First time like this…” she whimpers.

Her flattery fuels me, hardening my cock, driving me to thrust even harder. Then—

Gotsun! My cock hits her portio, right beside her cervix.

A raw, lewd scream escapes her.

“Ngoh♡ Wait, please…!” she begs.

“No waiting! This is it, right!?” I press.

Trying to escape by shifting positions, I pin her from behind, pounding doggy-style.

Dojun♡ — Dojun♡ Dojun♡ Dojun♡

“No… Aaa~~~♡ Big cock… Stop~~~♡” she pleads.

“Hah! Hah! Hah! Hah!” I roar.

She’s not truly resisting. She’s an actress. A student like me’s no match.

That’s why—

“Uooo!!!” I bellow.

“Liar!? Aaa♡ No, I said stop~~~♡” she wails.

I drill her lewd pussy hole with blazing speed, the zubozubo and high-pitched slaps echoing, loud enough to reach outside.

“Nngu♡ No… Really, I can’t… Anymore…♡” she sobs.

“Rei-san, I… I…!” I pant.

Lost in the pleasure of pounding her, my true feelings slip out.

“I’ve always been your fan!!—Ugh!” I confess.

“Nghiii~~~♡ Cumming… Cumming~~~♡” she screams.

Pouring my obsession into the busty actress I’ve jacked off to countless times, I unleash a torrent of semen, filling her vagina instantly with an absurd volume.

“Ohh… Kuh♡ Made to cum… by a younger, amateur kid…♡” she gasps.

She came for real, her voice trembling with frustration. Did I bruise her pride? But—

“You pass… My instincts were spot-on♪” she laughs.

Still—

“Good. Then let’s get wilder! Hn!” I thrust.

“Ngoh!? Why…♡” she yelps.

“‘Cause we’re just getting started…!” I grin.

I’m nowhere near satisfied.

One round? No way. With my dream actress right here, I’ve gotta savor every second.

“No way… You’re insatiable!?” she gasps.

Insatiable? Maybe. My semen regenerates fast, refilling mid-sex.

“Keep entertaining me, Rei-san!!” I demand.

“Naooo~~~♡” she wails.

Round two with Hoshizora Rei begins, and I’m only getting started.

※

“Haa… Haa…♡ So, you’re ready to be a porn star, right?” Rei pants.

We fucked till morning. As we wrap up, she asks.

“When you graduate, I’ll take care of you,” she offers.

“Uh…” I hesitate.

In her mind, my career path’s set.

But I can’t.

“No… I’m aiming for Teio University,” I say.

“What?” she blinks.

I want to marry Ayaka-san. That means meeting the Saionji’s bare minimum—admission to the toughest university.

“So, sorry…” I apologize.

“No way…” she says, stunned.

I feel bad for letting her down, but this is non-negotiable.

“Still… I had fun. Fucking you was great,” I admit.

“Y-Yeah… Right,” she nods.

We’ll probably never meet again, but it was a hell of an experience.

“Thanks,” I say.

“Wait, hold on…” she calls.

Feeling refreshed, I start getting ready to head home, but—

“At least swap contact info…?” she asks, blushing, holding out her phone.

“Huh?” I pause.

(Sharing that could blow my cover… Eh, whatever.)

She’s not a stranger anymore, so I agree.

“Alright, I’ll hit you up♪” she chirps.

“Sure,” I reply.

With that polite farewell, we part, returning to normal life.

※

Ping

“Hm? Who’s this… Wait, what?” I stare at my phone.

I thought we’d never meet again, but that same day, Rei messages me.

“When’s next? My body’s aching for you♡”

In the end, this sparks a long, ongoing connection with her.

T/N: There’s a part 4 and 5, but I won’t be uploading it kekw, it’s basically just a switch of POV to the audience/those who watch the AV, it may be a turn off for some, but if you wanna read it I will be adding it to the bulk uploads on gofile that I do every month for unlocked chapters.