How Using My Oppai Skill to Enlarge My Sister’s Breasts Led to Building a Harem - Chapter 22

Chapter 22

It’s winter, and we high school students are nearing winter break.

“Thank you for today, sensei.”

“Haha, no need to be so formal.”

I’m at the clinic, treating patients. I’ve just finished massaging my second patient of the day.

“One more appointment today,” Ayaka-san informs me.

“Thanks, Ayaka-san. It’s been busy lately, hasn’t it?”

“I’m sorry, sensei, you’re so busy…”

Ayaka Saionji, a beautiful woman with long black hair, looks dejected. I treated her breast cancer before, which brought us close, and now we’re lovers.

As a first-year high school student, I’m undergoing special training—studies, physical fitness, etiquette—due to certain circumstances. Adding clinic duties makes my days hectic.

“No, no! You’re helping out of kindness, Ayaka-san. You’re not responsible.”

This clinic uses my unique hand ability to heal women’s bodies. We don’t charge high fees; most earnings go to maintenance. Ayaka-san volunteers here for free.

“Word of your ability is spreading at the Saionji family’s hospital,” she says.

Most patients come via hospital referrals. Initially dismissed as quackery, doctors are revising their opinions after seeing cured patients.

“That’s good, right?”

“Yes… Your power is undeniably saving many people.”

(The issue is the media, as we discussed before.)

They invade privacy under the guise of “interviews.” Even with the Saionji family’s influence, I’m just a civilian, only able to borrow power within Ayaka-san and Miyabi-san’s authority.

“Could this get bad?”

“Well… as they say, you can’t stop rumors.”

If doctors talk, word spreads, and soon everyone knows. Logically, closing the clinic to focus on myself would be wise. I know that.

(But something feels off…)

I believe my hand’s power is a gift from God. If so, I’d be wrong not to use it for good.

(I’ve used it plenty for naughty stuff…)

But that’s not misuse—it’s to make women feel good and share happiness. Surely God approves.

“I won’t quit. If people need help, I have to heal them.”

Despite the drawbacks, I’ve benefited too much to stop.

“Sensei… Understood. I’ll prepare for any contingencies.”

Ayaka-san glances at Miyabi-san, the head maid, waiting in the back.

“Leave it to me, my lady, master. I’ve already devised measures,” Miyabi-san responds coolly.

“If Miyabi-san says so, I’m completely reassured.”

She’s the embodiment of perfection. I trust her implicitly.

With that, the discussion ends.

…

Knock knock

“Hm? The last patient?”

“I’ll handle it, sensei.”

Ayaka-san stops me from standing and goes to guide the patient. Miyabi-san watches her with gentle eyes, filling me with warmth.

“Is this… the massage clinic?” a faint, childish voice asks.

“Yes, it is. This way, please.”

“I, um, can’t see…”

“Oh! I’m so sorry. I didn’t know…”

(Blind? A visually impaired girl?)

It doesn’t change my duty to treat her, but as a non-doctor, I’ve never dealt with such a case.

The sound of a cane tapping—katsun katsun—approaches.

Soon, the source enters the room.

“I’m Nozomi Yuki… Um, nice to meet you…”

The girl, small and delicate, introduces herself with a bow.

“Please, take a seat—oh, you’re visually impaired, right?”

I nearly messed up. Pointing out a chair verbally is useless.

“Nozomi-chan, this way,” Ayaka-san gently guides her.

“Thank you, onee-san.”

“Fufu, you’re adorable, Nozomi-chan♪”

She’s right—cute. Maybe it’s her blindness, but she inspires a protective urge. I think this while reading her intake form, written by her family.

“Nozomi Yuki, 12 years old. Affected area—eyes…?”

I wasn’t told this. I glance at Ayaka-san; she shakes her head.

(She didn’t know either? How was she referred?)

Miyabi-san will investigate later. For now, I confirm with Nozomi.

“You came to treat your eyes, right?”

“Yes, I heard you might be able to cure them…”

Who said that? My power heals through breast massage, affecting nearby nerves. Curing blind eyes… impossible—right?

Nerves connect to the brain, so maybe it could reach the optic nerve. I recall Miyabi-san’s anatomy lessons.

Hmm, it might not be impossible…

I glance at Miyabi-san; our eyes meet. She’s expressionless, silent, but I sense her thoughts: There’s a chance.

My ability’s potential is still unknown. It’s worth trying.

“I’ll do my best, Nozomi-chan.”

“Thank you, sensei…”

Thus, I take on the daunting task of curing a young girl’s blindness.

…

“Can you lie down?”

“Um, yes.”

“Haha, talk normally, Nozomi-chan.”

“Can I?”

“Yeah, I’m just a high schooler.”

Four years apart—close enough for a sibling or cousin vibe.

“So you’re like a big brother, sensei?”

“Nice to meet you, Nozomi-chan.”

To her, I’m probably a mature older brother. That’s easier than formal speech with a little girl.

“This way, Nozomi-chan,” Ayaka-san guides.

“Thank you, onee-san.”

“Such a polite girl, Nozomi-chan♪”

Ayaka-san, smitten, pats her head and helps her onto the treatment table.

“I’ll lift your clothes a bit, okay?”

“Okay.”

Ayaka-san raises Nozomi-chan’s sweater, exposing her surprisingly developed chest.

“N… uu… It’s embarrassing knowing I’m being seen…”

“Don’t worry, the sensei is kind.”

“Okay…”

Despite her blindness, being exposed embarrasses her, her face flushing.

(She stirs a protective instinct—I can’t do anything to make her cry.)

I focus harder than usual to avoid impure thoughts, observing her breasts.

Her skin is flawless, pure white, likely from rarely going outside due to her blindness. My sister Ai, at that age, was tanned from playing outdoors.

Thinking this, I take out massage oil and prepare.

“Nozomi-chan, I’m applying oil.”

“U-Uh… hyau!”

“Too cold?”

“No, just startled…”

The oil, pre-warmed, isn’t cold.

(Such smooth skin… the oil slides right off.)

Careful not to stain her clothes, I drizzle oil on her breasts.

“It smells nice.”

“It’s rose-scented, to help you relax.”

“Yeah, it feels really nice.”

Ayaka-san provides top-quality supplies. The clinic’s in the red, but it’s her hobby, so she doesn’t charge me.

“I’m starting the massage. Stay still, okay?”

“Okay. Please.”

I feel bad for her nerves, but my power works best through breast massage. To treat her blindness, I slowly reach for her breast with my left hand.

Funyuri. Her young breast yields softly under my grip.

“A, uu…”

“Does it hurt?”

“I’m… okay…”

Funi♡ Funii♡

I knead her breast two, three times to gauge its feel.

(Soft, with a firm core. Definitely a child’s breast.)

Though well-developed for her age, it’s unripe compared to my experience—an immature fruit, splendid outside but childish inside.

“I’ll go a bit harder.”

“N! Uun… auu…”

Confirming its feel, I grasp both breasts with both hands, kneading them munyuri♡.

Kunya♡ Funifuni♡ Munyuu…♡

“Nuu♡ It… feels weird…”

“It’s okay, Nozomi-chan. The sensei’s checking what’s wrong,” Ayaka-san soothes.

(Uh… no physical issues. The optic nerve connects to the brain, right?)

Kneading her breasts, I probe for her optic nerve with my hand’s senses. The body links to the brain, and the brain to the optic nerve—it shouldn’t be impossible…

(No good… I can’t tell. I can reach the head, but the path to the eyes is unclear.)

I don’t want to give up. I want to help those in need, and I’ve grown fond of Nozomi-chan in this short time.

“Your body’s fine. Let’s take a break.”

“Haa… haa… okay.”

“Good job, Nozomi-chan. Let’s rest with onee-san♪”

Ayaka-san takes care of her. Meanwhile, I have a task—

“Something you wish to ask, master?” Miyabi-san says.

“As expected, you read me well.”

She sees through me. I ask her directly.

“What can I teach you?”

“The brain and optic nerve.”

…

“Hemicrossing, huh…”

“Both eyes’ inner visual fields cross over.”

The eye’s structure is complex. I thought the right eye fed the left brain, but the inner visual fields project to the opposite brain.

“So that’s how it works…”

I grasp the concept. Using this, I resume Nozomi-chan’s massage.

…

Munyu♡ Kunya♡ Funyun♡

“Uyu… nn♡”

“I see… so that’s it.”

Unlike before, I focus on the brain’s rear, where the optic nerve connects, kneading her breasts.

Rubbing them, I probe for optic nerve responses.

“Here’s the crossing… hmm.”

“Uuun… auu♡”

Excited by understanding her structure, I knead her breasts eagerly. My ten fingers glide over her smooth skin, tapping nerves like piano keys.

(My hand’s power alone isn’t enough… I need knowledge and skill to fully use it.)

The difference is imagery. Vague ideas couldn’t harness God’s power accurately.

“But this way… maybe…!”

I overlooked something crucial. Absorbed in kneading, I missed Nozomi-chan’s reactions.

“Aa♡ Aa♡ Aa♡ — Kyauuun~~♡”

When I noticed, she let out a cute cry and went limp.

“Sensei…!”

“S-Sorry…! Nozomi-chan, you okay?”

“Haa♡ Haa♡… I’m… okay…♡”

Her voice is dreamy, assuring me she’s fine. But stimulating the brain may have been too much. I apologize and monitor her.

…

“I’m okay now, sensei.”

“Good… I’m really sorry, Nozomi-chan.”

“You’re exaggerating.”

After ten minutes, she’s breathing normally and lively. But this was my mistake—I should’ve been slower, more careful.

“So, sensei, can you fix my eyes?”

“Hmm… I can’t say for sure, but they might improve.”

I’m scared of raising false hopes, but I won’t know without trying.

(I felt a response, though.)

I trust my instincts. If I hesitate, her eyes stay as they are.

“No, I’ll definitely cure them. Will you keep coming, Nozomi-chan?”

“Yeah! I trust you, sensei!”

“Thank you, Nozomi-chan.”

Thus begins my new challenge: curing blindness, deemed untreatable by modern medicine. It was incredibly difficult, but a month later, signs of recovery emerged, turning things around.