Little Sister, Don't Use Me as Your Fap Material! ~Operation to Capture the Perverted Brother-Sister's Special Fetish Girl~ - Chapter 6: I Want to Eat Your Cells

Chapter 6: I Want to Eat Your Cells

End of Arc 1

“So, how exactly does that Ani-Dick Cell stuff connect to you using me as fap material?”

“The side effect of the Ani-Dick Cells activating is that my sexual urges become abnormally strong, and the dependency gets really intense too.”

In simple terms, it’s like a sexual version of drug addiction.

“That only explains the ‘using me as material’ part. It doesn’t explain why you chose me specifically.”

“Isn’t it obvious? It’s because I like Onii-chan…!”

My heart skipped a beat. I couldn’t help it.

It wasn’t the kind of “familial love” a sister should feel for her brother.

No — this was unmistakably lust. The desire of a female toward a male. A bitch in heat toward a male.

The fact that this girl sees me as a sexual object…

The moment I fully realized it, hot blood rushed violently through my entire body, to the point it almost hurt my chest.

Have I ever been this excited in my entire life?

“I love Onii-chan even though you’re a virgin, ugly, stupid, bad at sports, have a terrible personality, a foul mouth, and smelly feet. That’s why I use you as my fap material!”

Madoka-chan… If you really love your Onii-chan, please be a little gentler with your compliments…

*

“Oh right, Onii-chan. About dinner tonight — is it okay if we just have instant curry? You came home earlier than I expected, so I didn’t prepare anything.”

“Ah, yeah, that’s fine. It’s my fault for coming back at a weird time anyway.”

“Sorry.”

“No, I’m the one who should apologize for not being considerate. I should’ve brought some takeout.”

“Also, I forgot to mention… If things stay like this, I only have less than 3 years left to live. So yeah, take care of me. Anyway, what flavor of instant curry do you want~?”

“Wait, wait, wait! Didn’t you just casually say something insane!?”

I almost missed it, but that was definitely not something you should say in the same breath as instant curry.

“What?”

“Sorry, I might have misheard. Can you say that again?”

“I love Onii-chan even though you’re a virgin, ugly, stupid, bad at sports, have a terrible personality, a foul mouth, smelly feet, and even bad breath. That’s why I use you as my fap material!”

That was going way too far back.

“No, not that part. The part after that.”

“Ah~ Right. So, I only have less than 3 years left to live~ Tehepero♡”

I was shocked by my little sister’s death sentence, delivered in the most casual tone imaginable.

It was far more shocking than being told I also have bad breath.

*

“When the Ani-Dick Cells become more active, I’ll die the moment I stop being a JK.”

“What do you mean by ‘stop being a JK’?”

“Hmm… Basically, I’ll die after I graduate from high school.”

“‘After graduating high school’ is pretty vague, isn’t it?”

“More precisely, the moment I step off school grounds after the graduation ceremony, my head will explode and I’ll die instantly.”

“That’s way too specific! What kind of death game setting is this!?”

There’s no way I can fully accept this, but…

“…Are you serious?”

“In this situation, there’s no point in telling a boring lie.”

“Hey, just say it’s a lie! There’s no way I can accept my little sister dying within the next three years! There’s no way I can just accept your death!!!”

My precious little sister…

My most beloved girl…

Shit! There’s no way I’m letting her become the victim of such a stupid, half-assed setting that sounds like it was thought up in a week…

As I hung my head, unable to hide my despair, Madoka gently leaned against me.

“Onii-chan, are you okay? Want to grope my boobs?”

She lifted her T-shirt, exposing her breasts, and offered them to me while whispering gently.

“This isn’t the time for that! Damn it! Isn’t there any way to save you!? Isn’t there a way to save Madoka!?”

“There is.”

Eh?

“If we ‘conquer’ perverted girls and collect Aninael Antibodies, we can destroy the Ani-Dick Cells inside my body. Then I can survive.”

“Aninael Antibodies… If we can get those, you’ll be saved!?”

“Yes. So I want you to help me. I want us to work together to conquer those perverted girls — the Spell Masters.”

“Leave it to me! I’ll do anything to save my cute little sister’s life!”

Madoka, if it’s to save your life, your Onii-chan will offer everything he has.

I’m ready to defy even God and sell my soul to the devil.

I won’t hesitate at any sacrifice.

Even if I have to hurt someone, or even kill, I — your older brother — will save you.

“Onii-chan, I actually have one request right now…”

“What is it? What do I need to do to save you?”

“For now… could you stop groping my boobs already…?”

*

“In that case, I’d like you to leave the room for a bit.”

Saying that, she lightly got up from the bed.

“Why do I have to leave?”

“Because I want to continue the ‘fun’ that Onii-chan interrupted earlier.”

She reached for my “unwashed underwear” lying nearby, but suddenly froze.

“…Onii-chan, give me the pair you’re wearing right now♡”

Huh? What is this girl saying? Has her brain finally boiled over?

“No, these are the ones I’ve been wearing all day. They’re pretty dirty, you know?”

“That’s exactly why! I’m telling you to hand over those dirty, smelly, freshly taken off briefs!”

She’s completely let loose now that she’s been caught.

“N-No… It’s embarrassing…”

“Te yandei! Beranmei! Hurry up and hand over those panties!”

“No! Please don’t use Onii-chan’s panties as fap material!”

“Haa~ What a pathetic big brother~ Can’t be helped. How about we make a trade? Let’s settle this with an exchange, okay?”

What’s with that weird dialect all of a sudden?

Is character breakdown also a side effect of the Ani-Dick Cells?

“What do you mean by exchange?”

“Go get a pair of grey panties from my room.”

“Why?”

“Just do it! Go!”

I went to Madoka’s room and, with practiced, efficient movements, took out a pair of grey shorts made of [53% Cotton, 35% Modal, 12% Elastane] from her lingerie drawer.

Sniff sniff.

Oops. Out of pure habit, I unconsciously smelled them.

Right before I was about to put them on my head like usual, I remembered my actual purpose and returned to my room.

*

“Here, I brought them.”

“Thanks.”

“So, what are you going to do with these?”

“I’m going to ‘use’ them right now.”

“Huh?”

“I’m going to turn these panties into ‘dirty panties’ so I can trade them for Onii-chan’s dirty ones♡”

Huh? What is this girl saying? Has her brain finally boiled over?

*

“Alright then, let’s get started!”

Madoka put on the grey panties I gave her and lay down on her back on my bed, just like before.

She placed her left hand on her chest and her right hand between her legs…

“Ah, Ah, Nn♡ Ahn… Nnn♡”

She started masturbating right in front of her brother.

“You idiot, what are you doing!?”

“Can’t you tell by looking? Nn♡ It’s masturbation, obviously♡”

Well, yeah, I can tell by looking, but…

My brain is struggling to keep up with this insane visual information.

Madoka vigorously rubbed her crotch over her panties.

“I’m dirtying these panties for Onii-chan right now, so watch closely, okay♡”

Rub rub, rub rub.

“Aaahhh♡ It feels so good♡ Clit masturbation feels so gooood~♡ Ooooh♡ Oh no♡ My hips are lifting♡”

With the back of her head and soles of her feet still on the bed, Madoka’s hips and ass lifted into the air.

This naturally gave me a perfect view of her crotch.

No — she was deliberately showing it to me. Showing me her pussy while she indulged in masturbation.

Rub rub, rub rub.

“Ooh♡ Ohh♡ Ohhh♡ It feels so good♡ So gooood♡ Having my clit played with while Onii-chan watches feels amazing♡ Look!♡ Watch your little sister obsessively playing with her cunt!♡ Look at this masturbation-addicted stupid pussy!♡”

Rub rub, rub rub.

Love juices overflowed from her masturbation, creating visible stains on the grey panties.

I see. Grey panties really do make the “stains” stand out the most clearly.

The stain grew darker and larger as more love juice continued to pour out, eventually soaking the entire crotch area.

Rub rub, rub rub.

“Ooooh♡♡ Oh shit♡♡ I’m gonna cum!♡ I’m cumming♡ I’m cumming♡ But♡ No♡ Not yet! No♡”

Rub rub… Stop.

She suddenly stopped moving her hand, lowered her raised hips and ass, and lay flat on her back again.

Her heavy breathing filled the room.

“…Did you just cum?”

“No, I stopped right before. You can tell, right?”

How the hell am I supposed to tell just by looking? …Oh right, she said she squirts when she cums.

*

She stood up, slid off the grey panties, and held them up right in front of my face.

“Here, Onii-chan. Freshly made, straight from the source — ‘Little Sister’s Genuine Masturbation Love Juice Covered Dirty Panties’♡”

She turned them inside out and showed me the crotch area.

A thin, sticky string of love juice stretched from the fabric to the tip of her index finger as she poked at the wet spot.

“I’ll give you these ‘dirty panties’ in exchange for the ones you’re wearing right now! It’s a good deal, right♡?”

When she shows me something like that, there’s no way a man can refuse…

I quickly took off my current pair and handed them to her.

“Here.”

“Yay!”

My little sister accepted her brother’s panties with a huge smile on her face.

Immediately, her eyes locked onto the crotch area.

“Eww~ Just as I thought, there’s a huge pre-cum stain♡ What’s this? Did watching your little sister masturbate turn you on? Fufufu♡”

Of course it did after seeing all that.

With a lewd grin, Madoka planted a kiss right on the pre-cum stain.

“Well then, I’m going to properly use these underwear for a real orgasm masturbation session now, so could you kindly get out of the room already♡?”

*

※ ※ ※ ※ ※

After Madoka finished her intense masturbation session, the two of us ate instant curry, took turns bathing, and I finally returned to my own room.

The room, which had been so chaotic earlier, was now completely silent.

I collapsed onto my bed on my back and stared at the ceiling, lost in thought.

My brain feels like it’s about to explode from taking in way too much information at once…

…Let’s stop thinking for tonight.

From tomorrow onward, things are going to get busy whether I like it or not.

There’s no need to rush.

The story of us brother and sister has only just begun.

I placed my little sister’s panties — which had a much wetter crotch than usual — over my face and pulled down my own pants.

Arc 1

The Little Sister Who Uses Her Brother as Fap Material

Aoyama Madoka Arc – END

Next Arc

Arc 2

The Outdoor Exposure Disciplinary Committee Member

Midorigawa Kaede Arc

To be continued