Little Sister, Don't Use Me as Your Fap Material! ~Operation to Capture the Perverted Brother-Sister's Special Fetish Girl~

Chapter 1: The Aoyama Family’s Mornings Are Slow

Author’s Note:

※ Warning ※

The heroines in this story are, without exception, vulgar and extremely perverted.

If you’re looking for a pure, refined, elegant heroine, please refrain from reading.

This is not a refined, high-class erotic novel.

It’s an erotic light novel with a rough balance of 50% gag comedy, 30% ero, and 20% rom-com!

The main themes of this work are masturbation and abnormal sexual fetishes.

If you enjoy high-tension gags and stupid, brainless eroticism, then this story is definitely for you!

Bookmarks, reactions, and comments are always appreciated!

Thank you for your support!

“Hey, get up already, change your clothes and eat. You’re gonna be late!”

Opening the door with the nameplate that reads Aoyama Madoka, I mercilessly yank the blanket off the single bed and drag my hopelessly sleepy little sister out of her slumber.

This has been my daily morning routine for the past three years—ever since I was in my third year of middle school.

Even though we’re blood-related brother and sister, we’re still a guy and a girl. At first, I did hesitate… but humans get used to anything. After about two weeks, this had already become just another part of everyday life.

For the Aoyama family, this is completely normal.

Just like washing your face or fixing bed hair — the older brother wakes up his little sister.

With the familiar sense of déjà vu I’ve experienced hundreds of times over the past three years, I grab the target blanket with practiced hands and rip it off with force.

Whoosh!

The blanket flies into the air in sync with my arm swing, and the sweet, sugary scent unique to a girl in puberty spreads right in front of my nose.

At the same time, a very familiar scene jumps into my view.

What was hiding under the cute polka-dot blanket was a 160cm-long “pill bug” indulging in lazy sleep.

Bathed in the morning sunlight streaming through the window, her navy blue pajama set glowed vividly.

“…Mmm… Just five more minutes…” zzz

As usual, she squints and turns over, clearly bothered by the light.

Hey, if you frown that hard, you’re gonna ruin that naturally cute face of yours.

Still… even then, she’s more than pretty enough. My little sister really is quite the beauty…

“Fnyuu… munyamunya…” zzz

Even after having her blanket stolen, my sister continues to sleep soundly. I drop my gaze to her defenseless body.

Man… her terrible sleeping posture really hasn’t changed since we were kids.

If normal bad sleeping posture is like a “grade school sports festival,” then hers is straight-up a “monster war.”

What the hell happens while she’s sleeping to end up in this state?

At least her cute little belly button is peeking out from where her pajama top has ridden up, so it doesn’t look like the Thunder God did this…

“…Uguu… munyamunya…” zzz

Still though…

Hey, little sister. Don’t you think the clothes you’re wearing aren’t really doing their job anymore?

From every direction, various parts of her “skin color” are aggressively asserting their presence and passionately appealing to me.

Her cleavage, the curve of her waist, the cleft of her ass.

Her collarbones, her calves, even the soles of her feet.

Gulp…

Faced with the shameless body of a teenage girl laid out before me, I can’t help but swallow hard.

I’m once again reminded that the creature known as a JK (high school girl) is erotic simply by existing.

And when she’s this beautiful on top of that… it’s even worse.

While desperately suppressing the lust that had already begun rising this early in the morning, I pretend to stay calm and call out to the “Sleeping Princess.”

“Hey Madoka, if you keep lying around in such a sloppy position, those uselessly huge tits of yours are gonna spill out.”

Just as I said, beyond the second button that had come undone, her ample twin mounds were peeking out cramped and tight.

The outlines of the buds about to sprout, pushing up against the fabric, clearly proved that she was a “no-bra when sleeping” kind of girl.

Depending on the angle, I could probably get a direct view of those pink tips…

“Uuu… You can look at my boobs, so just let me sleep a little longer…”

While still lying on her back, she undid the third and fourth buttons herself, making the deep valley between her breasts even more prominent.

Just because I’m her real brother doesn’t mean she has to be this defenseless.

Apparently there are scumbag brothers in the world who get turned on by their little sisters’ bodies.

Of course, I’m one of those scumbags.

Sure, I do this every morning, so I’m used to waking her up. Hell, I’m practically sick of it.

But…

But still… breasts are something you never get tired of, no matter how many times you see them.

Her F-cup breasts are the ultimate peak of my desire — an insurmountable wall. No, an unreachable “mountain.”

Even though they’re just lumps of fat, nothing more than a collection of cells… honestly, they’re irresistible.

Well, as her older brother, a lot of things end up “piling up” and it’s honestly pretty rough…

“…You don’t have to show them off. Hurry up and wake up already.”

I grab both of her shoulders with my hands while she’s still lying on her back indulging in sleep, and shake her body back and forth and side to side.

Her barely-covered breasts bounce with a slight delay.

Shake right → boing

Shake left → boing

Shake side to side → boing boing

Shake back and forth → boing boing

I repeat this for a while.

As her older brother, I’m only trying to wake her up out of good will so she won’t be late. I’m definitely not shaking her just to watch her tits bounce.

…At least that’s what I want to believe.

After silencing the snooze function on her phone’s alarm and enjoying about ten minutes of breast bouncing, I finally remembered my mission as her brother.

“Hey, if you don’t get up now, you’re seriously gonna be late.”

“Nooo, I wanna sleep a little more…”

“Don’t be such a spoiled brat, you weakling!”

“I don’t want to be lectured by a guy who stopped my alarm just so he could enjoy watching my boobs jiggle…”

Tch. She noticed, huh…

“I think the brother who uses ‘waking up his sister’ as an excuse to shake her tits and get hard first thing in the morning is way more of a weakling…”

Ugh. Even half-asleep, she hits me right where it hurts.

What a terrible little sister, speaking logical arguments to her older brother.

Seriously, I’d love to see what our parents look like…

Fine then! If that’s how it’s gonna be, I’ll just go all out and shake them as much as I want!

Shake shake shake shake!

Boing boing boing boing!

As a result of violently shaking her defenseless body—whose unbuttoned pajama top was barely hanging on her shoulders—her clothes finally slipped, opened, and fell.

Not just a glimpse. Fully exposed.

Literally completely naked from the chest up, two magnificent F-cup hills spread out before my eyes.

That gloss. That firmness.

As expected from a current high school girl in the prime of her teens.

They were truly spectacular, indescribably beautiful raw breasts.

The peaks of her healthy, slightly flushed breasts were crowned with bright, vivid pink nipples that sat proudly.

Uhyohyo♡

My little sister really has such wonderfully enjoyable tits♡

For the privilege of being allowed to see these breasts, maybe I could let her sleep just a little longer…

Am I a weakling for thinking that…?

Completely unbothered by the fact that her massive tits were exposed, she tries to go back to sleep again.

“You can keep looking at my boobs, so let me sleep for another five years…”

“Fine, just five more minutes… Five years!?”

For a split second I almost agreed, thinking it wasn’t a bad deal, but if she slept that long, the story would end without the main heroine even getting out of bed.

As the protagonist, I couldn’t allow that, so I reached out to her shoulder again to wake her.

“Stop saying stupid shit and get up already!”

“Ughhh~ You’re so noisy~”

But before my hand could touch her shoulder, she grabbed my wrist and stopped me.

“Oh right! Onii-chan, let’s sleep in together! That’ll solve everything!”

“Uh? Even if we sleep in, I don’t think it’ll solve anything. In fact, it’ll make things worse…”

“Stop complaining! Ei!”

She yanked on my arm and forcefully pulled me onto the bed where she was lying.

“W-wait, hey— Whoa!”

I fell forward, face-planting right into her chest.

My face sank into her bountiful breasts, and on top of that, she clung to me with her entire body like I was a life-sized hugging pillow.

Squish squish~

While feeling an incredible softness and pleasure from her body, her firm, elastic skin pressed against my nose and mouth, making it quite hard to breathe.

“Mmm… I can’t breathe… uguu…”

“Jeez~ Your ‘hard thing’ is poking my thigh~ You’re way too horny in the morning, Onii-chan! You pervert!”

She was the one who caused this situation, yet she has the nerve to say that. Is she some new type of opportunist?

Still, in this kind of situation, it can’t be helped that my dick gets harder and bigger, even if it’s my little sister.

“Well then, good night again~”

Still hugging me, she rolls over to her left side.

As she changes position, my “rod”—which had grown bigger than usual—gets squished between her thick, meaty thighs and tightly enveloped.

Nuhah! What a sweet, heavenly sensation!

The exquisite pressure, neither too strong nor too weak, sends a clear, slippery “ejaculatory feeling” rising from the base of my penis…

My brain goes numb from the overwhelming excitement.

“W-wait, Madoka! Seriously, this is bad! Let go!”

“What lol? Did you seriously get turned on by your cute little sister lol? Onii-chan, you’re such a pervert lol.”

“Shut up! Just let go already!”

“Haa~ This is why virgins are so… Fine, fine, I get it~”

Suddenly, the pressure hugging me disappears.

Her body heat, elasticity, and scent were regretfully pleasant, but I somehow managed to suppress my desire with what little reason I had left and stood up.

Of course, I was hunched forward.

“Here, hurry up and go back to your room and jerk off by yourself, Mr. Virgin♡”

My little sister gives me a grin that’s a little too young to be called a succubus.

I didn’t need her to tell me—I was planning on doing exactly that from the start.

After burning the image of Madoka’s still-exposed F-cups into my memory one last time to preserve their freshness in my brain, I quickly returned to my own room.

About two minutes later.

“Madoka—! Get up already! You’re gonna be late!”

This time, without hesitation, without being tempted, and without mercy, I dragged her out of bed.

It was as if I had been reborn as a wise sage.

The foolish older brother who had been ruled by lust was no more.

[Aoyama Family Morning Battle — Results Report]

Lost: 5 tissues from my room

Gained: A sense of emptiness, unique fatigue, and lethargy

Successfully defended: My little sister’s chastity

End of report.