Chapter 2 – My Sister’s Bro-Con Is Out of Control

As a rule, I take the stairs when I go home.

Living on the sixth floor of a condo right near the station, I have a daily routine: elevator on the way out, stairs on the way back.

“Welcome home!”

The moment I opened the door, I was enveloped by something soft.

My sister’s chest.

I swear it’s gotten even bigger these past few days.

“Can’t breathe. Let go a little.”

“Liar. My chest isn’t that big yet.”

“It’s at least bigger than it was yesterday.”

“You can tell? Oh, Aki-kun, you’re such a sis-con.”

To put it simply, my older sister, Karin Yamabuki, has a severe case of bro-con.

When I put some muscle into my arms to pull away, she pressed her D-cup chest against me even harder. By the way, she’s the one who told me she was a D-cup, not that I ever asked.

“Where’s Mom?”

“At work.”

Huh.

I thought her shifts weren’t supposed to be on her days off.

“What a sweatshop.”

“Apparently, they’re short-staffed because it’s ‘Special Sunday’ or something.”

A big sale on a Sunday sounds rough.

I offered a silent prayer for my mother, who was no doubt being swamped at the register.

“What about Dad, then?”

“Who knows? Pachinko, maybe?”

“The worst part is that I can totally believe that.”

With both Mom and Dad out, it’s just me and Nee-san home alone.

Honestly, it’s a situation where I could be pounced on at any moment. My chastity is in danger.

In any case, I guess you could say my weight training has paid off. I forcibly peeled my sister off me and went into my room.

“Honestly, Aki-kun. You’re so rough.”

And with that, the active JK brazenly walked into a high school boy’s room that doesn’t even have a lock.

Even from my perspective as her younger brother, my sister is beautiful.

People have been calling her pretty or cute since we were little, so it’s not something I even think about anymore.

She has short hair, long enough to cover her ears, and her features are as perfectly formed as a doll’s. She is the very definition of a beautiful older sister.

Today, she’s in a simple white T-shirt and a pair of ridiculously short shorts.

Her lush, bare legs shine, reflecting the light.

“Nee-san.”

“What is it? Oh, speaking of which, did you pick up the next volume of Yuuita for me?”

“Of course. Here you go.”

I pulled two light novels from my crossbody bag and handed them to her.

My sister doesn’t know that I just came back from a date.

In the first place, she doesn’t know that I have a girlfriend—or rather, that I had one.

My cover story: a perfect solo-day-out plan where I carefully selected books at the bookstore, then went to a coffee shop to read before coming home.

Nee-san completely fell for it, failing to detect that I was going on a date.

“You know, Nee-san, you only ever read stuff that guys would like.”

“Well, of course, right? If you’re going to read it, Aki-kun, then I have to read it, too.”

“And what happens if you don’t?”

“I’d die, probably.”

That sounds serious.

I should probably be more careful about the light novels I read, too. At the very least, I don’t think there were any weird scenes in volumes four and five of The Maverick of Hero Academy Wants to Pull Off a Power Move, which I bought today… so I should be okay.

“Aki-kun, did something sad happen today?”

“…How did you know?”

Lying on my bed and sniffing it intently for some reason, a smirk crept onto Nee-san’s lips.

Wait, does my bed smell or something?

“I know pretty much everything about you, Aki-kun. When you’re sad, I instinctively get sad, too.”

Nee-san, you’re a psychic.

“It’s not that I’m sad, exactly, but maybe a little… down? Or tired?”

“It’s okay. You can tell me at your own pace. I’ll wait until the day I die.”

Don’t worry, I’ll probably tell you something before you die.

“It’s nothing major. I’ll probably have forgotten about it by tomorrow.”

That’s a lie, but I’d rather not have my sister prying into my business.

I’m planning to distract myself by reading for a bit.

In reality, a breakup isn’t as painful as I imagined.

I feel like a weight has been lifted from my shoulders, like I’ve been freed from a chain that was binding me tightly.

Chifuyu was a little possessive.

If I so much as talked to Hayasaka-san, the girl in the seat next to me, she’d start screaming about how I was cheating. Eventually, she even started glaring at me just for eating lunch with my guy friends, Shinichi, Souichi, and Ryuuji.

To be honest, I was getting sick of it.

At my core, I’m a man who is both free and a loner.

I want to sail across all the world’s oceans, but I was trapped in the single port that was Chifuyu, unable to move my ship.

“Actually, maybe I feel more relaxed now?”

“Aki-kun… muttering to yourself… You really have lost your mind. It’s okay, even if you’re crazy, you’re still the number one little brother in the world.”

I wish you wouldn’t certify me as crazy just for talking to myself.

If that’s the standard, then Nee-san and Chifuyu are well into the territory of complete lunacy.

“—Huh, uh, Nee-san?”

This time, it was Nee-san who pushed me down onto the bed.

The only reason I didn’t resist was because of how exhausted I was.

The soft body of a girl enveloped my own, which I’d toned through bodyweight training.

Wait, if someone saw us right now, wouldn’t this look really, really bad?

“It’s okay, Aki-kun. I’ll kiss it all better.”

“This is not okay at all.”

My sister’s beautiful legs are locked firmly around my waist. They’re so slender and delicate, yet they’re well-muscled, which makes them erotic in every way.

—Wait, what am I doing feeling erotic about my own sister?

“Now, tell me what happened.”

“There’s no way I can—”

“If you don’t tell me, are you aware that I’m just going to assault you right here and now?”

Here we go.

Her ultimatums are always so damn unreasonable.

“Okay, okay! I’ll talk, so let go.”

“Eh, was that a pun just now? Jeez, Aki-kun, you’re so cute.”

Wow, this person is a total airhead.

“The truth is… I got dumped by my girlfriend.”

“…Aki… kun…?”

—Ah, I’m going to be killed.