Little Sister, Don't Use Me as Your Fap Material! ~Operation to Capture the Perverted Brother-Sister's Special Fetish Girl~ - Chapter 12: Is That a See-Through Black Vertical-Striped Knit F-Cup on the Menu?

Chapter 12: Is That a See-Through Black Vertical-Striped Knit F-Cup on the Menu?

Since we were about to head to the abandoned building to tail Midorigawa, we decided that staying in our school uniforms would be a bad idea given the time of day. We both changed into the most inconspicuous casual clothes we could find.

“Jeez, because of Onii-chan, I have to change my panties too,”

Madoka said with a strangely satisfied expression as she headed back to her room to change.

Alright, time for me to change as well.

In times like these, the savior of a fashionless virgin like me is the mighty “Uniclo” — that great nationwide apparel giant. Even for someone like me, they can make you look somewhat decent and presentable. Truly impressive.

I put on a plain light gray T-shirt (680 yen), a dark gray jacket (4980 yen), and switched to black stretch jeans (5380 yen), then left my room.

*

At the exact same time, I ran into Madoka in the hallway — she had just finished changing too.

“Wow~ When you dress normally, you actually look like a proper guy!”

No matter what I’m wearing, I’m always a guy.

Does this girl default to thinking of me as some kind of male monkey?

“Look who’s talking. I told you to wear plain clothes!”

“Eh? I think this is pretty plain and inconspicuous though…”

Madoka’s choice was a thin black vertical-striped knit top and a brown long skirt.

Her coordination was so good that even famous reader models would probably run away barefoot in defeat if they saw her.

…Okay, maybe that was a bit too much brotherly bias.

Thanks to the nature of the vertical-striped knit, her massive breasts were emphasized to an almost criminal degree. Even without staring, the outline of her bra was clearly visible through the fabric.

As someone who prefers “clothed ero” over full nudity, the sight of her “see-through black vertical-striped knit F-cups” was pure bliss. My dick, which had finally calmed down after putting some distance between us, immediately began to react again.

“Hey Madoka, I have a request…”

“I have a bad feeling about this… What is it?”

Whisper whisper whisper.

“…Onii-chan, are you serious?”

“Yeah, I’m serious♡”

“Jeez~ Can’t be helped~! Why are you so ridiculously horny despite being a virgin, you idiot…”

“Fuhihi, sorry♡”

*

“Come on, hurry up and take out your dick and jerk off! You want to cum all over my ‘black vertical-striped knit boobs,’ right?”

“What’s this, Madoka? You’re rushing me. Can’t wait any longer? lol”

“As if! I already called a taxi, so I want you to finish before it arrives! Hurry up and jerk off!”

“Oh, so that’s why. In that case, I’ll gladly take you up on your offer…”

Boing.

I pulled down my stretch jeans and underwear, exposing my fully erect cock right in front of Madoka.

“So, Madoka, what do you think of your Onii-chan’s hard dick?”

“Yeah yeah, it’s big, it’s big.”

“Alright, here I go, Madoka.”

“Fine, just hurry up.”

Her curt, business-like attitude felt unusually rare and somehow made my excitement rise even more.

Stroke stroke stroke stroke.

I stroked my cock vigorously while Madoka watched from up close.

Stroke stroke stroke stroke.

“…Hey, aren’t you cumming yet? Hurry up and cum already.”

“Sorry, since this is a rare ‘handjob appreciation’ session, I thought it’d be a waste to finish too quickly…”

“We have plans after this, so I want you to cum quickly! I’ll watch you jerk off as many times as you want in the future, so just finish already this time!”

“Mmm… but still…”

*

“Haa~ Can’t be helped. Guess I’ll use that tactic…”

Stroke stroke stroke stroke.

“Tactic?”

“Onii-chan♡ Please give your ‘dick milk’ to Madoka♡”

“!?”

“Onii-chan’s dick milk… I want you to splurt it all over Madoka’s ‘boob tissue’♡”

“!!?”

“Come on, Onii-chan, you can cum now♡ Do it!♡ Cover me with your stinky dick milk!♡♡♡”

“!!!”

Stroke stroke stroke stroke.

“Ugh! Madoka! I’m cumming! I’m gonna cum all over those tits!”

“Yes! Lewd talk induction strategy success! Yeah, cum!♡ Spray your dick milk all over Madoka’s black vertical-striped knit boobs!♡”

Stroke stroke stroke stroke.

Stroke stroke stroke stroke.

Stroke stroke stroke stroke.

“Hey, if you’re gonna cum, then cum already! Are you some low-tier AV actor or what!?”

Shit, it’s a waste, but I really can’t hold it anymore!

“Ugh! I’m cumming! Madoka!”

Splurt!! Splurt splurt splurt!!! Splurt! Splurt…

I unleashed my thick, sticky load directly onto her F-cups wrapped in the black vertical-striped knit.

The amount was equal to — or possibly even more than — what I had shot onto her T-front earlier.

“Uwaa~ This is bad… Onii-chan, you have zero mercy when it comes to using your little sister as a cum rag.”

Just as she said, her black knit top had been completely transformed into what looked like a used tissue.

The upper part of her ample breasts, covered by the black vertical stripes, was now heavily stained with my cloudy white semen.

“So, Onii-chan? How did it feel to mercilessly cum all over your little sister’s ‘see-through black vertical-striped knit F-cups’?”

“…It felt really good///”

“Good. Then it was worth getting cummed on♡”

*

With the expression of a craftsman who had just finished a job, Madoka used her right hand to rub my semen into the black knit fabric, thoroughly soaking it in.

It left some staining, but the white color blended into the black, making it less obvious at a glance.

“We’re about to go outside, and you made me let you cum on my clothes… That’s beyond inconsiderate.”

You’re also pretty inconsiderate for actually letting me do it, you know.

“Seriously, Onii-chan is such a pervert…”

Sniff sniff, sniff sniff.

She pulled the semen-soaked part of the knit up to her nose with her left hand and took a deep whiff.

“It stinks!♡ Onii-chan’s cum stinks so bad!♡ This thick dick milk smell is insane!♡ I’m getting wet!♡ Just smelling this stinky male juice is making my pussy throb like crazy!♡”

It seems my idiot little sister had entered full heat mode triggered by the smell of my semen.

“I want to cum!♡ My pussy! I wanna play with my pussy!♡ While smelling Onii-chan’s dick milk, I’m gonna finger my cunt!♡ Madoka is gonna masturbate right now!♡”

My unfortunate sister, whose IQ seemed to have dropped to around 3, impatiently pulled her panties down, roughly hiked up her long skirt, and shoved her right hand underneath.

Is this girl seriously about to start masturbating right here?

Even for my sister, this is seriously dangerous behavior.

Well… I’m not really one to talk.

*

Right at the moment Madoka was about to begin masturbating in earnest, we heard the sound of a car horn from outside.

Looking out the small window in the hallway, I saw a taxi parked in front of the house.

“Hey Madoka, the taxi you called is here. It’s rude to keep them waiting, so let’s go.”

“Eh? Wait a second, Onii-chan! I was just about to have a serious masturbation session! My pussy is soaking wet and I’m super horny right now!”

“No. The taxi is here, so that’s not happening. Come on, let’s go.”

“Time out! Onii-chan, wait! Just one minute! With my pussy in this condition, I can cum in one minute! Please♡ Let me finger my pussy♡ I’ll let you watch your little sister’s live masturbation show from the best seat, so just let me do it♡”

“No! As a professional masturbator, I cannot overlook causing trouble for others with masturbation! Let’s go!”

“Onii-chan, you already got to cum earlier, that’s not fair! I want to cum too! I wanna masturbate! I want my pussy! Pussy! Pussy!”

Even my beloved little sister’s desperate pleas were nothing more than meaningless noise to me in my post-nut clarity.

While forcibly dragging my still-muttering sister — who kept repeating “Pussy! Pussy!” — by the arm, I opened the front door.

Now then, let the Midorigawa Kaede Conquest Operation begin!