Chapter 18: Education

I must have lost consciousness.
I woke up in Sister’s warm embrace, sunlight streaming through the window.
I was naked, just like yesterday. My skin looked soft and smooth.

But why was Sister naked too?

I couldn’t tear my eyes away from the… scenery.
I put aside my questions and enjoyed the feeling of her smooth skin and ample bosom against mine. Her warmth enveloped me.

I snuggled in her arms. The damp sheets felt slightly unpleasant, but it was bearable. This was unavoidable during “education,” after all. A faint, musky scent lingered, but it would wash out.

I remembered yesterday.
I was excited to spend the entire day with Sister, but she was too… diligent.

So, yesterday was all about “education”?
Disappointed, I sighed.
A dull ache pulsed in my lower back as I shifted slightly.

Sister’s “education” was quite intense.
Even I, who prided myself on strength and stamina, found it slightly overwhelming.

I always lost consciousness during these sessions.
When I woke up, I couldn’t remember what happened or what I’d learned.
So, I had to be re-educated every time.

Yesterday was no different.
Sister played the role of an academy pervert convincingly.

Perhaps Sister was right; it was just education.
My saintly sister couldn’t possibly be a pervert.

She started by kneading my buttocks, expertly manipulating my body.
Her hands, sometimes gentle, sometimes rough, explored my soft, yielding flesh. Each caress sent shivers down my spine.

A heat built within me, and I was helpless against the rising tide of sensation.

Ah…Sister, there… !

She quickly found my weak spot.

It’s okay, Ellie. I’ll be gentle. Just breathe deeply…

Exposed, I squirmed and struggled against the overwhelming pleasure.

Aaah…?! Mm…

But my resistance was futile. As her fingers tightened their grip, I trembled, my body tensing, my tongue peeking out between my lips. My consciousness flickered.

She didn’t stop.
Her fingers relentlessly explored my sensitive folds, ignoring my pleas. I couldn’t even make a sound.

Unable to move, afraid of hurting each other, I could only lie there, my mouth slightly open, feeling her fingers inside me. I couldn’t risk biting her.

Her fingers finally withdrew, coated in my slick arousal.

I couldn’t remember anything after that. I woke up with a sore throat and a limp body.
Sister had been merciless in her “education,” showing no mercy to her cute younger sister.

She really had no flexibility.
She was the most upright and diligent person I knew.
Even her habit of sleeping in couldn’t tarnish her perfect image. Someday, I’d make this infuriatingly virtuous sister mine…

I kissed Sister’s cheek.
A dark, possessive feeling consumed me, knowing I was taking advantage of her while she slept.

I pressed myself closer.
Sweat slicked our skin, mingling our scents. We were sisters, born from the same womb. Perhaps that’s why I felt such a sense of unity and belonging when we were together like this.

I planned to wait until she woke up.

But I fell asleep first.

****

“Sister, I saw an adventurer the other day.”

We sat at a table laden with food Sister had prepared while I slept.
I spoke as I ate the food she offered me. I wanted to share my first encounter with a real adventurer.

But Sister seemed disinterested, focusing on feeding me.

She didn’t seem intrigued.
Determined, I told her about Lena. Sister still seemed oblivious, but I continued my story.

I told her how cool and kind Lena was, and how I wanted to introduce them. I kept the part about cuddling Lena’s ample bosom to myself. I hadn’t seen her since, but I longed to meet her again.

Clang—

Sister’s fork clattered onto her plate.

Her hand trembled.

“…Introduce us? Who is this Lena, Ellie?”

She seemed wary of this stranger.
She’d change her mind after meeting Lena.

“Lena’s the adventurer I’ve been meeting every night. I’m going to see her again tonight… What’s wrong, Sister?”

“Meeting every night? But…there are no signs of…anyone else touching you…”

Sister looked thoughtful, muttering to herself. Was there a problem?

Her red eyes blazed as she said,

“Ellie, adventurers are dangerous! Absolutely not!”

She launched into a lecture about the dangers of adventurers.
According to her, they were all promiscuous perverts with strange fetishes, only interested in my body.

I pouted and protested weakly,

“But Lena isn’t like that…”

“…It seems you need more…education, Ellie.”

Sister seemed determined to correct my “misunderstanding.”

But not all adventurers were perverts.
Sister was mistaken.
I needed to set her straight.

She stroked my hair, leading me to the bed.

…All adventurers were perverts.

I woke up after the weekend was over.
I couldn’t attend classes; my body was too sore.

Sister was relentless.
Thanks to her, I was cured of my “misunderstanding.”
But I couldn’t get out of bed that day.

****

Back at the academy, I slowly made my way to class, my body still aching.

Sister’s “education” was longer than usual this time. Perhaps because it had been a while.

I still felt…strange.
My period wasn’t due for weeks, yet I felt a throbbing ache in my lower abdomen.

My back felt broken, and my entire body ached. There were strange marks on my neck and body… My poor physical condition dampened my spirits.

At least I wouldn’t need more “education” for a while.
Even Sister apologized, saying she went too far.

Why was she apologizing for correcting my misunderstanding? I should be thanking her. She was too kind. I worried if she’d be able to handle my… intense feelings.

This morning, she even helped me bathe, as an apology.
I hadn’t grown taller, so she didn’t need to…massage me anymore.

Sighing, I entered the classroom.
The walk felt longer than usual, like climbing a treacherous mountain.

My legs trembled as I sat down.
The students were quiet and tense, as usual.
I glanced at Linne.

As expected, the oppressive atmosphere originated from her.
She radiated a cold aura, her delinquent attire amplifying the effect. She stared out the window, seemingly unaware of my presence.

Did something happen? Had she caused trouble while I was gone?
But this was my chance. A chance to get revenge for all the times she poked and prodded me.

It was payback time, Linne.

I quickly poked her in the side. Unlike my soft flesh, hers was firm and toned. I expected her to jump, but she just slowly turned around.

Her cold, indifferent eyes met mine.

As our eyes locked, her eyes softened, the coldness melting away, replaced by a warm smile. She looked genuinely happy to see me, a stark contrast to her earlier gloom.

“Ellie…!”

She reached out to me. I was already reaching for her, my hand landing on her side, right where she usually targeted me.

But this time, I was prepared.
I wouldn’t be caught off guard.

I’d endured the icy waterfalls of the Northern Mystics with my bare skin. I could handle this.

“Hngh?! Sorry…!”

It seemed my revenge would have to wait.