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

Chapter 14: Abandoned Building ☆ 7 PM — Don’t Be Late

Just as we had expected, Midorigawa Kaede appeared in front of the abandoned building, still wearing her school uniform.

Seeing a girl in uniform out in the city like this gives off a completely different charm than when you see her inside the school~ Dehehe♡

“…Onii-chan, you’re already stretching your nose just from seeing Midorigawa-san in her uniform. Are you really going to be okay later?”

The self-proclaimed number one beauty of the school (lol) glared at me with half-lidded eyes.

“Can’t be helped. That girl’s very existence is basically R-18. That face! That body! Of course my nose is gonna stretch, and my dick’s gonna get hard!”

“If we’re talking about that, there’s also a super sexy R-18 beautiful girl right next to you, you know♡”

My little sister struck a mysterious, supposedly-sexy pose while going “Ahh~♡ Ufufu~♡”.

“What the hell is that weird dance? Are you doing Awa Odori or something lol?”

“Don’t make fun of me!!!”

Oops, maybe I teased her a bit too much?

Young people these days get angry so easily.

“Don’t make fun of Awa Odori!!!”

Ah, so that’s what she got mad about!?

“Comparing my unique pose to Awa Odori is rude!”

So you do know it’s weird…

“Come on, Onii-chan, apologize to the good people of Tokushima Prefecture!”

“No, I don’t think we need to go that far…”

“Hurry up and apologize! The Tokushima blood inside me won’t stay silent!”

You don’t have a single drop of Tokushima blood in you, though.

“Fine, then I’ll show you what real Awa Odori looks like!”

With that, Madoka actually started dancing the Awa Odori.

Chan chan chan chan♪ Chan chan chan chan♪

The hand movements, hip sway, footwork, rhythm, facial expression, and every gesture from head to fingertips were all perfect — a genuine, authentic performance.

Amazing!

Her dancing was so flawless that I seriously started wondering if she actually had Tokushima blood in her veins.

Feeling ashamed of my earlier words, I lowered my head.

“I’m sorry to the good people of Tokushima Prefecture for comparing my little sister’s weird pose to Awa Odori!”

“Good. As a representative of Tokushima Prefecture, I forgive you!”

…You’re not a representative of anything.

“But how were you able to dance Awa Odori so perfectly?”

“Well~ One of the hidden themes of this story is to cover material from all 46 prefectures, so I’ve been practicing for a while!”

I wonder which prefecture is being left out…

“I’ll keep working hard to cover everything except Saitama Prefecture!”

“The blood flowing through you isn’t from Tokushima — it’s from Chiba…”

Midorigawa headed toward the external staircase on the side of the abandoned building. She lightly lifted the yellow chain blocking the entrance, nimbly ducked under it with practiced movements, and began climbing the stairs without any hesitation.

The time was approaching 7:30 PM.

What on earth was a girl like her doing, stepping into such a ruined place so late at night?

Aside from the noble goal of saving Madoka’s life, my personal curiosity was greatly piqued.

Midorigawa… Just what is a beauty like you doing in a place like this at night?

Using one of Madoka’s “Stalker Seven Tools” — the “Onii-chan Surveillance Binoculars” — we confirmed that Midorigawa had reached the rooftop via the external stairs. Only then did we move to the bottom of the staircase ourselves.

The yellow chain blocking the entrance turned out to be made of plastic when I touched it.

In the center hung a handmade-looking sign cut from plastic cardboard that read 【Danger! No Trespassing!】 in somewhat sloppy handwriting done with an oil-based marker.

That elegant handwriting… It was probably made by Midorigawa herself.

She even went to the trouble of making a sign like this. Whatever she’s doing up there, she clearly doesn’t want anyone to see.

Looking up, the external staircase was brightly illuminated by the pale blue lights from the neighboring “Nishiyoko Love Hotel” building, making visibility surprisingly clear.

A 14-story building, roughly 40 meters tall — Midorigawa Kaede’s secret nighttime base.

So that beautiful girl is doing it somewhere beyond these stairs… Mufufu♡

“Alright, Madoka, let’s go! Follow me!”

“Onii-chan, you’re so reliable! You actually look kinda cool for once!”

With the spirit of leading my little sister, I began climbing the pale blue external staircase.

However, by the time we reached the landing between the 7th and 8th floors, I was completely exhausted and stopped.

“Haa— Haa— I’m tired! My legs hurt! I can’t walk anymore! Save me, Madoka-mon!”

I plopped down on the floor, breathing heavily with my shoulders heaving.

“Jeez~ I was just starting to respect you a little, but you’re still as pathetic as ever~. Come on, there’s only half left. Let’s keep going!”

“No… I don’t have the stamina for this anymore…”

I’m well aware of how pathetic I sound, but I’m also proud of how little physical strength I have.

I no longer have the willpower or energy to reach the rooftop.

This is what it truly means to be completely spent.

“You really are hopeless, Onii-chan. Want me to give you a piggyback ride the rest of the way lol?”

“There’s no way I can accept being carried by my little sister! As her older brother, I refuse!”

“Jeez, you’ve always been stubborn about the weirdest things.”

Back then…

I used to carry Madoka on my back quite a few times when we were younger…

That’s right. An older brother isn’t someone who gets carried by his little sister — it’s the other way around.

“…That’s it! Madoka, I have a plan! I’ll carry you on my back!”

“Eh? Why?”

“By carrying my little sister, the hidden ‘Big Brother Power’ inside me will awaken, and using that energy as fuel, I’ll rush up the remaining stairs in one go! Pretty genius, right?”

“I don’t really get the logic, but I haven’t had a piggyback from Onii-chan in a long time, so let’s try it!”

I crouched down with my back facing Madoka.

“Come on, Madoka! Your Onii-chan will give you a ride!”

“Okay, I’ll trust in this ‘Big Brother Power’ thing!”

Madoka pressed her body against my back, getting into position for a piggyback.

Squish.

The upper part of my back was filled with the soft sensation of her see-through black vertical-striped knit F-cups.

Mmm… This isn’t awakening “Big Brother Power” — it’s awakening my “male functions”♡

“Onii-chan, what’s wrong? Why aren’t you standing up?”

“Well~ I’m already rock hard, you see~”

“?”

However, we couldn’t afford to waste time here.

I placed both hands on Madoka’s ass and stood up with force.

“Ehehe~ It’s been so long since Onii-chan gave me a piggyback~ It feels nostalgic♡”

Rub rub, rub rub.

“…Um, Onii-chan? Could you stop groping my butt and actually start walking?”

Rub rub, rub rub.

“…Hey, what are you waiting for? Why are you just silently fondling your little sister’s ass?”

“Oops, sorry. It’s been so long since I last carried you that I got nostalgic…”

“You’re getting nostalgic while groping your little sister’s butt!? That’s gross!”

Rub rub, rub rub.

“Do you remember, Madoka? When you were in first grade, we got separated from Mom and Dad at the summer festival and became lost. I carried you on my back back then too…”

Rub rub, rub rub.

“Stop it! I don’t want to hear precious memories with my beloved Onii-chan coming from the mouth of a gross guy who’s groping my ass!”

Rub rub rub rub.

“Hey Onii-chan, you can keep touching my butt, but can we please start moving?”

“I want to, believe me… but sorry, Madoka.”

“?”

“You’re heavier than I imagined… I can’t take even one step. What should I do?”

“I’ll throw you into the Naruto Strait, you idiot!!!”

Since her fake Tokushima blood seemed about to flare up again, I quickly let her down from my back.

Phew~ She was heavy~!

As expected, a JK weighs a decent amount.

“Madoka, I think you should go on a diet.”

“You have zero delicacy! Besides, I’m not heavy — you’re just too weak!”

“I have confidence in my stamina though.”

“Stamina?”

“My personal record for masturbation sessions in one day is 13 times!”

“Please stop. There’s nothing more pathetic than a virgin bragging about his masturbation count…”

“Seriously, Onii-chan has no delicacy at all~. For someone with a sexy body like mine, it’s normal to be a little heavier than average, okay?”

“So you are heavier than average…”

“Shut up! Appearance is more important than actual weight! Even Midorigawa-san is taller than me, has bigger breasts, and probably has a bigger butt, so I bet she weighs more than me too.”

“But her waist and thighs are clearly sharper than yours lol.”

“Onii-sama, even if it’s true, there are things you should and shouldn’t say…”

“If I were carrying Midorigawa, I bet I could climb these stairs no problem~”

“Onii-chan, be honest — you like Midorigawa more than me, don’t you?”

“Idiot! As if! Why would I like a girl like her!!!”

“Wow, that’s painful! Stop it! A virgin’s tsundere act is way too cringy!”

“Anyway, I don’t have any energy left to keep going…”

I sat back down on the landing with a thud.

“You really are hopeless~”

Leaving her pathetic brother behind, Madoka climbed a few steps toward the 8th floor and then suddenly stopped.

Then, she grabbed the back of her brown long skirt — the side facing me — and roughly hiked it up.

Her peach-shaped ass and the cleft between her cheeks were revealed, barely covered by light blue see-through panties that offered almost no protection for her private parts.

“Onii-chan, if you chase after the panties right in front of you, I’m sure you can still keep going!”

As if dangling a carrot in front of a horse…

That classic tactic actually works on me.

I stood up and, as if drawn in, brought my face close to her panties.

Before my eyes was a vertical slit visible through the thin light blue fabric, filling my entire field of vision.

After confirming my movement, she began climbing the stairs. Naturally, I followed right behind, chasing the “panties” in front of me.

Madoka, I swear on your light blue see-through panties and that peach ass cleft —

I will not stop moving until I save your life.

※ ※ ※ ※ ※ ※

“Wait, we’re already at the rooftop!?”

While I was staring at Madoka’s ass, we had somehow reached the top in no time.

I wouldn’t have minded if there had been about 20 lines of blank space so I could enjoy her butt a little longer.