How Using My Oppai Skill to Enlarge My Sister’s Breasts Led to Building a Harem - Chapter 14

Chapter 14

I headed to the clinic after school for scheduled massages.

“A car’s parked. Ayaka-san’s already here?”

As usual, a fancy car sits outside when Ayaka visits. It’s become familiar, so I nod to the bespectacled woman in the driver’s seat. She notices and returns a polite greeting.

(Maid outfit… and she’s gorgeous.)

Resisting the urge to stare at the beautiful maid, I enter the clinic, where Ayaka greets me as expected.

“Hello, sensei. Thanks for having me.”

“Ayaka-san, hello. Thanks as always.”

Her refined bow is always a sight to behold.

“As mentioned, we have two appointments today, sensei.”

“Got it. Let’s get ready.”

I perform the best breast massages possible for the patients.

“Thank you so much, sensei.”

A madam, referred here for a large tumor, is finally cured today. Tears in her eyes, she thanks me.

“No problem, glad you’re healed.”

My hands have grown stronger, making treatments more effective. I can now cure conditions even doctors would give up on, as long as it’s breast-related.

(Plus, there should be secondary benefits.)

The body’s nerves are connected. Massaging breasts improves beauty, health, and anti-aging—I feel it working. And I sense this ability has more potential.

Thinking this, the day’s work wraps up.

“Good work, sensei. Another amazing treatment!”

“Haha, you’re too kind, Ayaka-san.”

“No, truly, your skill saves so many people.”

“Well… thanks. By the way—”

I express gratitude for her cleaning and restocking.

“N-No, I do some cleaning, but… most of it’s my maid.”

“Oh, the one waiting in the car?”

“Yes, Miyabi. She’s very capable.”

So the beauty’s name is Miyabi. Ayaka seems thrilled talking about her.

“You two are close?”

“Yes… though it’s a master-servant relationship, she’s been my playmate since childhood, being close in age.”

Ayaka smiles brightly.

(Miyabi and Ayaka together would captivate anyone.)

“So, I was thinking… I want to thank both you and Miyabi.”

“Thank us?”

“Yeah. I can’t maintain this clinic alone. I want to show my gratitude.”

I’m a bit nervous they might ask for something expensive, but they don’t seem strapped for cash.

“A thank-you… Well, then—”

“What?”

“—would you come to my home?”

Her unexpected answer throws me off.

“Me, visit? That’s a thank-you?”

“Of course. Your precious time is a luxury.”

“Well, just visiting’s no problem at all.”

“Oh♪ That’s wonderful! How about next Saturday?”

“Fine by me. I should be the one asking.”

Maybe they’ll serve something delicious. But the best part is spending more time with Ayaka.

I look forward to Saturday while going about my usual routine.

※

Saturday arrives quickly.

They offered to pick me up, so I hop into the car on time, heading to Ayaka’s place.

“Thanks for coming out, Miyabi-san.”

“It’s only natural to fetch a guest.”

My first time in a luxury car makes me restless. I didn’t take off my shoes, but the interior’s so pristine I hesitate to step in.

(So spacious… no trunk?)

Unlike regular cars, there’s no cargo space, making it roomy enough to stretch my legs.

“Feel free to relax. Drinks are available.”

“Oh… these?”

A mini-fridge holds water, coffee, and sodas. To ease my nerves, I grab a foreign sparkling water I’ve never seen.

(They’re richer than I thought… maybe a penthouse?)

Unfamiliar with wealth, I can only picture a YouTuber’s luxury condo. The car ride is quiet, heading toward an upscale residential area.

“We’re almost there. Please check for forgotten items.”

“Y-Yes, I’m good.”

I only brought my phone and wallet for a casual visit.

“We’ve arrived. Please wait a moment.”

“Huh? This… is a house?”

Miyabi operates a touchscreen, opening a grand gate to reveal a vast estate with a splendid mansion. It’s not old but has a modern Japanese-Western design, like a historical manor.

(Must be the owner’s taste.)

“The garden’s huge…”

“It’s small for a Saionji property.”

“I… see…”

Overwhelmed by the difference in perspective, I admire the well-kept garden as we reach the entrance, and I finally step out.

“Akane-san, take care of the car.”

“Yes, Miyabi-sama.”

Miyabi delegates to a subordinate maid and leads me inside.

“Welcome, sensei.”

“Ayaka-san… ah!”

I catch my breath. Ayaka stands at the entrance, welcoming me, but her sheer outfit, more alluring than usual, stuns me.

“…Beautiful.”

“Oh, sensei…”

The word slips out, not flattery but truth. Her beauty draws my soul.

“S-Sorry…”

“Milady, what about lunch?”

“Oh, right. Sensei, have you eaten?”

Miyabi’s suggestion breaks the awkward moment.

“No, not yet.”

“Wonderful! We’ll prepare something♪”

The chef can make anything, but I ask for something simple. Miyabi heads to the kitchen, and Ayaka pulls me by the arm to the dining room.

(She’s so close… and smells amazing…)

Ayaka seems excited, like she’s been waiting for this. Her mood lifts mine.

“Sensei, the food’s coming soon.”

The dining room, like a restaurant, serves a meat-heavy meal.

“Young people need protein,” Miyabi says.

Sure, meat’s simple to cook, but it’s clearly premium.

“Thanks, it was delicious.”

Ayaka beams, happy I ate a lot.

“Shall we relax and play?”

“Of course.”

One thing bothers me—her husband. I ask.

“We’re separated now. There were… issues.”

“I see.”

Her sad, downcast eyes tell me enough. Their marriage was rocky, so she could invite me.

I switch to a brighter tone.

“So, what should we do?”

“Well…”

I don’t know the mansion, so I’ll go along with her wishes.

“How about the pool, sir?”

“A pool?”

“Yes, we have one.”

Rich people and pools, huh? It’s a bit chilly, though.

“It’s heated, so no issue.”

“Wow, impressive.”

“It’s a small pool, a bit embarrassing…”

…

In the changing room, I slip into the provided black swim briefs.

(These are tight…)

My growing cock makes the standard size barely cover the bulge. But I can’t complain about what they gave me.

The pool, indoors for privacy, is led to by Miyabi.

“Wow, nice pool.”

Not for parties, it’s a real swimming pool.

“Sorry to keep you waiting, sensei.”

“Ayaka-san…”

I swallow hard.

She’s in a plain white swimsuit, but it can’t contain her voluptuous body. The normal-sized suit reveals her curves.

“Something wrong, sensei?”

“N-No, nothing…”

(I almost got hard…)

Erecting in someone’s pool would be bad. I breathe deeply to banish lust.

“You’re… very handsome, sensei♡”

“Huh!?”

Ayaka blushes, eyeing my body. I don’t think I’m that praiseworthy.

“Let’s get in, sensei.”

“Right!”

Both blushing, we enter the pool.

“It’s warm. Feels great…”

“I’m glad you like it. Oh, my hair…”

Her long hair isn’t ideal for swimming. She steps out to tie it, raising her arms.

“!?”

Her white swimsuit is too thin, turning see-through. Her nipples and pussy’s outline are visible.

“Something wrong?”

“N-No, um…”

She’s focused on her hair, unaware. Her breasts jiggle, puru♡ puru♡, as she moves.

(This is bad… my crotch is heating up.)

A breast lover like me can’t resist. Blood rushes to my cock, stretching the tiny fabric to its limit.

“Eek♡ Sensei…♪”

“S-Sorry… You’re too attractive, Ayaka-san.”

“N-No… my swimsuit isn’t…”

She realizes her see-through suit reveals her breasts and pussy.

“I’m so sorry… this is shameful…”

“No, no, you’re beautiful and alluring.”

My erection won’t subside. The stretchy fabric holds, but it’s clearly not hiding anything.

“No one’s watching, right?”

“Y-Yes… it’s just us in the house…”

(Probably maids outside the door…)

Not wanting to lose this chance to admire her, I suggest continuing. Red-faced, she agrees, and we re-enter the pool.

“Haa… Ayaka-san…”

“Ah… your splendid thing… it’s touching me…♡”

“You’re so lovely, Ayaka-san… chu, chuu…”

“Ahn… nn… chu♡ churu♡… haan…”

We lean close, whispering, exchanging light kisses.

“Quiet, or they’ll hear.”

“Hn♡ You’re mean, sensei…”

I splash the pool water to mask sounds, savoring her sweet lips.

“Haaa… I’m so happy…♡”

“Chu. Let’s stay like this.”

I press against her in the water, enjoying her soft touch. My hard cock twitches, poking her lower abdomen.

“Au… there♡ There…♡♡♡”

“??—Feels good here?”

Not sure why, I poke her abdomen with my rock-hard cock, munyumunyu♡.

“Haa♡ Haa♡ Haa♡ Sensei, I… I…!”

“Ayaka-san? What’s wrong?”

“N-No, nothing…”

She started to say something but stopped. Relieved it’s not dislike, I relax.

“Can you hold me like this a bit longer?”

“Of course. I love you, Ayaka-san.”

“Hau…♡ I love you too…”

We spend time in the warm pool, embracing, not swimming.

…

After the pool, the maids serve tea. I don’t know tea leaves, but it’s crisp and delicious without sugar or milk.

“Your sister’s in middle school, right?”

“Yeah, she’s studying hard for exams this year.”

Ai wants to attend my school. Satsuki plans to continue modeling instead of advancing.

“My alma mater is nearby.”

“What’s it called?”

“Shinko Girls’ Academy.”

A nationally famous elite school for upper-class daughters.

“Normal students can’t get in, right?”

“Is that so? Are there conditions?”

“Milady, Shinko requires a recommendation from a graduate or relative.”

Miyabi explains.

“Oh? Did you have a recommendation, Miyabi?”

“Yes, from the Saionji family.”

“I see.”

Miyabi attended as Ayaka’s maid while a student, serving her.

“Miyabi was always top of her class. I was so proud.”

“It’s only natural as a Saionji maid.”

The Saionji family, with over a thousand years of history, is a top noble house. Miyabi, from a branch family, was chosen for her excellence.

“My lady’s charisma holds true value.”

“Ayaka-san was impressive too?”

“She was student council president for three years.”

Leading an elite school of noble daughters is incredible.

“Oh, Miyabi. I was just a figurehead.”

Three years means she was president from her first year. She calls it decorative, but her charm is undeniable.

“Miyabi graduated top of her university too, right?”

A top-tier university. Miyabi’s brilliant, never forgetting what she learns.

“A genius, huh? I can’t compare…”

“Not at all.”

Miyabi speaks calmly, not consoling.

“I’m just good at mimicking. A true genius creates from nothing.”

“Hmm…”

“An IQ of 200 just means faster thinking, not genius.”

It’s impressive to normal people, though.

“You’re too hard on yourself, Miyabi…”

“It’s the truth.”

She has some fixation. Genius or not, her brilliance is enviable to an average student like me.

Their school stories continue, fascinating tales of an elite girls’ academy. I lose track of time, engrossed.

“I want to hear more.”

But their dazzling backgrounds stir conflict in me.

(I shouldn’t be chatting with people like them. They’re from another world.)

Their lineage, wealth, and abilities far outmatch mine. I feel ashamed for treating Ayaka as an equal.

(Maybe I should keep my distance before I cause trouble…)

…

Dinner is lavish Japanese cuisine, heavy with oysters and soft-shell turtle, known for boosting stamina. It feels intentional.

(What’s the plan… Miyabi’s doing?)

The swimsuits were odd—too small, see-through. Too unnatural for a mistake.

(Couldn’t do it in the pool, and now I’m pent up…)

With people nearby, we haven’t had sex today. My body’s buzzing, ready to burst.

(Is she telling me to ravish Ayaka-san? No way… she’s married, even if separated.)

No maid would let a stranger assault her master’s wife. No way…

“The bedroom’s ready. Japanese-style, as requested?”

“Yes, thank you.”

My house lacks a tatami room, so I requested this mansion’s fine one.

“Your room’s there.”

“Thanks.”

I walk the wooden corridor and slide open the fusuma.

“I’ve been waiting, sensei.”

Ayaka waits, dressed in a yukata.