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

Chapter 9: You’re Not Enough by Yourself

This morning, while my little sister was pouring sauce on her fried egg, she casually said:

“Onii-chan, last night you jerked off to Natsuki-chan, didn’t you?”

“…Yeah, I did. Is there a problem?”

I briefly considered trying to deny it, but then I remembered the 16 surveillance cameras and decided to just own up to it.

“Even if it was Natsuki-chan, using another girl as fap material… when you already have a dedicated Onii-chan-only onapet right next to you!”

My dear little sister, as much as I hate to say it, calling yourself “Onii-chan-only” is a bit of a stretch.

From the perspective of any guy attending the same school, you — with your F-cup breasts, extremely cute face, anime-like waist, plump and bouncy ass and thighs, and constantly short skirt — are undoubtedly one of the top candidates for nightly fap material.

Of course, I myself am included in that category of “guys attending the school.”

“While I was watching you through the surveillance camera like usual, at first I thought, ‘There he goes again, jerking off like an idiot while thinking about his cute little sister, what a monkey lol.’”

You even call your beloved Onii-chan a “monkey”…

“But at the very last moment, right at the climax, that monkey let out ‘Natsuki!♡’”

Ugh, yesterday’s me was seriously gross.

“I thought I was your fap material while you were jerking off, but it turned out that at the very end, your actual fap material was Natsuki-chan… This is what they call a ‘Jujutsu Trick,’ right?”

“It’s not ‘Jujutsu,’ it’s ‘narrative trick.’

Besides, I wasn’t trying to pull off any trick. And something this low-level definitely doesn’t deserve to be called a narrative trick.”

Above all, even if she’s sharp-tongued and the embodiment of lookism, a cute-faced childhood friend with a ponytail and D-cup breasts is absolutely meant to be used as fap material.

And luckily, yesterday the girl herself personally provided me with fresh material.

Thanks to her, I was able to shoot out some seriously thick semen.

“Madoka-san, I have one request.”

“What is it, you cheater?”

“Could you keep quiet about the fact that I called out Natsuki’s name at the moment I came…?”

“Sure, I’ll keep quiet. Honestly, even I wouldn’t want to tell her something that gross.”

Phew~ Saved.

If Inspector Akazaki found out, I might actually end up with a criminal record.

“In exchange, tonight when you jerk off, use me as your material, okay!”

You don’t even have to tell me — I was planning on that from the start anyway.

“Actually, even last night, after that I jerked off to you.”

“Eh, really? You’re not just saying that to get on my good side, are you?”

“It’s true. Want to check?”

And so, we ended up checking the hidden camera footage from last night on Madoka’s room PC.

“Okay, I’m playing it.”

“Go ahead.”

On the monitor appeared last night’s me, in the middle of masturbating.

Ugh… Watching myself solo is honestly hard to bear…

“This is the second round after you used Natsuki-chan. Ah, this premature ejaculator is already about to cum.”

Indeed, the speed of my right hand stroking my cock had clearly increased.

Stroke stroke stroke stroke.

“Ugh, Midorigawa!♡”

“Not me, but Midorigawa-san!?

Slap.”

Madoka delivered a crisp tsukkomi.

“Huh? The second round was Midorigawa? Then the next one should be you.”

“Alright, let’s fast forward a bit… Ah, around here maybe~”

Again, my right hand moved up and down with the same intensity.

Stroke stroke stroke stroke.

“Ugh, Natsuki!♡”

“Again with Natsuki-chan!? Get your shit together!”

Smack.

This time the tsukkomi was a bit stronger.

I’ve thought this for a while, but my little sister actually has pretty good timing with these.

“As expected of someone who’s been my sister for over 10 years.”

“Next! The next one is definitely you, so please believe me!”

“Really~? I don’t trust you at all…”

“Look into my eyes! See? Does this look like the eyes of a man who’s lying?”

Intense stare!

“Y-Yeah… Those are the pure, unclouded eyes unique to virgins! …Fine, I’ll believe you one more time!”

“Ugh, Ayane!♡”

“Who the hell is that!? Now some random woman’s name popped up!”

“You don’t know the sexy actress Mochizuki Ayane? You must be a casual fan. She’s one of my staple fap materials.”

“Don’t make a sexy actress one of your main fap materials while you’re a high school student! This is a co-ed school — there are fap materials everywhere you look! Just use the JKs around you!”

“…You know, that’s actually a very logical point…”

“Which is why I’m changing your password so you can’t log into FA◯ZA anymore!”

“Nooo~ That’s too cruel! Please have mercy~!”

“No objections! Take that!”

Click click click click.

“Done. Password changed!”

“No way… My ‘Mochizuki Ayane’ collection…”

Sniff “Uuu… Hic…”

“Don’t actually cry just because your porn was taken away. That’s pathetic~”

“Can’t be helped… I guess I’ll have to watch the physical discs for a while…”

“Buying physical discs too? You’re the very model of a devoted fan…”

“Those signed goods I bought at events in Tokyo were originally meant for collection, you know…”

“Oh, so when you occasionally went to Tokyo, it was to attend promotion events for sexy actresses. At that point, you’re not just a fan — you’re a believer…”

“Yes, I am a devout believer in Mochizuki Ayane!”

“You shouldn’t declare that with such pure, sparkling eyes.”

“Ugh, Madoka!♡”

Finally, on the fifth round, it was Madoka’s turn.

“See~ As expected, the ‘main heroine’ appears dramatically at the very end!”

For now, I’ll butter her up a bit so she doesn’t get upset again.

If my memory serves me right, I think I used Natsuki one more time after this, so for Madoka’s honor, I should probably stop the video here.

Now then, how will she react after actually seeing herself being used as her brother’s fap material?

Surely 1 out of 5 isn’t enough to satisfy her?

“Ehehe~ Onii-chan was using me as fap material~ Jeez~ You siscon idiot, you love your little sister way too much!♡ Fuhihi♡”

So easy!?

Just 20% and she’s already this happy?

It seems my little sister has quite the “easy” personality.

…Tonight, I’ll make sure to use her 100%.

Her older brother secretly swore this in his heart.

※ ※ ※ ※ ※ ※

Just like yesterday, I walked to school with Madoka clinging to my arm.

If Midorigawa sees us like this, we’ll probably get scolded again. But on the flip side, it also creates an opportunity to talk to her using Madoka as an excuse.

Enjoying the soft sensation of my little sister’s breasts through her blazer while potentially getting to chat with Midorigawa — what a wonderful commuting style.

Come to think of it, there was something I wanted to ask Madoka about Midorigawa.

“So, are you really planning to put a GPS on Midorigawa?”

“Yup! If you want to know more about someone, GPS is the first step, right!”

As always, my little sister’s way of thinking is dangerously extreme.

“Oh right, where exactly is the GPS you put on me? If possible, I’d like it removed as soon as possible.”

I had checked my bag, the inside of my shoes, and my uniform, but couldn’t find anything.

I was genuinely curious how cleverly she had hidden it.

“Your GPS is embedded inside your body, so removal would require surgery.”

Embedded!? Surgery!?

…She’s gotta be joking, right lol.

“Hahaha! Madoka-chan, your jokes are as funny as ever~ You almost had me there for a second lol.”

“Joke? No, I’m serious… Well, more importantly, we need to focus on conquering Midorigawa-san right now.”