How Using My Oppai Skill to Enlarge My Sister’s Breasts Led to Building a Harem - Chapter 51.5
Chapter 51.5
A quiet road leading to a small hill, slightly removed from the residential area. A lone car sits parked there.
If empty, it’d raise suspicions of illegal parking, but this vehicle’s clearly occupied.
“Aan♡ So… amazing…♡”
The car’s not just occupied—it’s rocking violently, betraying the presence of people inside.
“Aa…!! More, make it rougher…♡”
“Guh…! Kokoro-san…”
If anyone passed by, the sounds would give them away instantly. A man and woman entwine relentlessly in the cramped interior.
The woman’s mature, the man still carrying a boyish air. Under the midsummer moonlight, drenched in sweat, they crave each other.
<Shidou Kokoro’s Perspective>
I dragged a 17-year-old boy into my car, his thick, sturdy cock clamped between my thighs.
“Aan… Wonderful…♡”
“Kokoro-san… Kokoro-san…!!”
My first date, invited despite zero romantic experience—it’s beyond my wildest dreams.
(To be loved by a boy this strong, cool, and cute…)
I’m obsessed with him. So in love, I bared weaknesses I’d never admit.
“I’ll take full responsibility…!”
“Aaan♡ You’ll… take me, right?”
“Of course!”
His cock thrusts harder.
My second time having sex, yet the addictive pleasure hits like a storm.
Dochun♡ Dochun♡ Dochun♡ —Dochun♡
My car, usually just for work commutes, creaks and sways.
(I’m so happy… Happy, happy…)
The joy of being loved by this young boyfriend threatens to burst my heart.
“Kokoro-san… Why… are you crying…?”
“A… It’s… I’m just so happy…”
Tears spill unnoticed. He’s erased my half-given-up hopes for love and future fears.
(Even if my knees don’t heal, I’ll support him with my savings.)
I never expected him to take care of me. His promise to stand by me is enough—a salvation.
“Call me… Kokoro?”
“Okay? …Kokoro.”
“Yup♪”
I love strong men. I want my boyfriend to be strong.
“Kokoro…! Gonna wreck you!”
He growls, thrusting up from below with fiery intensity.
“Nhaa…♡ So good~~~♡”
His youthful, passionate sex pulls my body along, moving like it’s young again.
Gishi♡ Gishi♡ Gishi♡ Gishi♡
The car bounces, metal groaning as if it might break.
“Amazing, amazing… So amazing~~~♡”
His sturdy cock pierces my naughty hole, zubozubo♡, pounding in and out with fierce slaps.
“Love you… Love you so much~~~♡”
Impaled by my ideal prince, I rock my hips desperately.
(I’m cumming…♡ Too good, I’m cumming…)
His massive cock churns my vagina, the overwhelming pleasure pushing me to climax without pause.
“Cumming~~~♡”
Like an electric shock, pleasure locks my body. My mind blanks, seeing only his handsome face.
“You’re cute, Kokoro…”
“Auu…♡”
My heart skips, overwhelmed with joy. My body moves on its own.
“Haa…♡ Haa…♡ Wreck me more…♡”
Thrust up by a younger man, I moan like a beast. My body, submitting to his strength, tightens, craving his superior genes.
“Guh…!? Incredible…”
“Ohho♡ Cum… Cum, cum, cum~~~♡”
My female instincts blaze, my vagina squeezing his thick rod, kyun♡ kyun♡, milking his precious seed.
(I want it…♡ His sperm… I want it~~~♡)
“Ohh♡ Ohh!! —Cum~~~♡ Inside my vagina~~~♡”
“Uooo… Kokoro! Gonna cum hard… Guooo!!!”
His roar precedes a lift, my body impaled on his meaty stake.
“Gahaa~~~♡ Cumming~~~♡”
“Oaa…!!”
At my peak climax, his chiseled body tenses, firing a hot load inside.
(Kuu…♡ Such force…)
I scream silently, trembling with pleasure, catching his young seed in my womb, crying out in ecstasy.
“Stay with me… forever…♡”
“Yeah, of course, Kokoro…”
I’ll never let him go. No matter the age gap, I’ll stay with him.
(I’ll take care of him forever…)
Savoring his love’s proof shot into my cervix, I bask in dreamlike bliss, catching his youthful passion again and again.
※
“I’ll drive you home.”
After satisfying him, to avoid getting too late, I drive him home as planned.
“Thanks, Kokoro.”
“No biggie… Fufu♪”
With my cool, young boyfriend in the passenger seat, I ease the car forward, stealing glances while focusing on safe driving.
“Straight ahead.”
“Okay.”
I don’t doubt him, but the houses thin out, the road stretching on.
“No homes out here, right?”
“Nah… It’s fine. No mistake.”
High walls line the road, like a castle’s ramparts, endless.
“Almost there.”
“???”
A heavily secured gate appears, nestled between the walls. I glance at him, but he’s calm.
“A bit closer.”
“L-Like this?”
He tells me to edge toward the gate’s camera. I steer, and he lowers the window, showing his face.
“—Huh?”
“Let’s go.”
With that, multiple locks click open, and the massive gate swings wide.
(What’s happening??)
At his urging, I drive through a vast, garden-like path. Despite the night, evenly spaced lanterns cast soft light, illuminating perfectly trimmed greenery, creating a fantastical scene.
“Won’t we get in trouble…?”
“It’s fine. We’re almost there.”
As he says, a grand, historic Western-Japanese mansion emerges, built more for passion than practicality.
“Uh… Is this really okay?”
“Yup. Park at the front.”
Intimidated by the tycoon-level estate, I pull up to the entrance. As if on cue, the modern Western door opens.
“Welcome home, Master.”
Out step young, stunning beauties in Western maid outfits—beauty after beauty, ten in all, bowing deeply to the boy beside me.
“Thanks, everyone. Bit late, but… I’m back.”
He responds naturally to the surreal scene. As I stare, dumbstruck, his hand rests on my shoulder.
“You should rest a bit, Kokoro.”
“U-Uh…”
I step out, handing my keys to a red-haired maid.
“Understood.”
Normally, I’d never give my keys to a stranger. But in a place like this, no one’s stealing my cheap car, so I comply.
My beat-up sedan, laughable next to this mansion, is driven to the back by the maid. Glancing at it, I step into the opulent interior.
“Welcome home, Master.”
“I’m back, Miyabi-san.”
“And welcome—Shidou Kokoro-sama.”
“Huh?”
A breathtaking woman calls my name, shocking me. How does she know me? Why the honorific? Questions swirl, but—
(This woman’s no ordinary person…)
Her stance is flawless, exuding overwhelming power, unnerving me just by facing her.
“Miyabi-san, prep a guest room. And the bath.”
“Understood. The grand bath is ready.”
“Got it.”
He gives orders to her casually. Even I, dense as I am, realize—
“Are you… from some crazy rich family…?”
An heir, maybe. This vast estate, far from downtown, isn’t normal. This princely boy must be a real prince.
“Shidou-sama, this gentleman is no mere heir.”
“Huh?”
Her words stun me. Who else could command servants in a mansion like this?
I’m lost. She continues.
“He is the head of the Saionji family.”
Saionji—the colossal corporate empire, Japan’s wealthiest.
“No way…”
He’s no prince.
“It’s no lie, Kokoro.”
He’s a king.





































