Source
https://kakuyomu.jp/works/16818093075629868223/episodes/16818792436553041848
It’s been a month already since the forest school trip ended.
Nothing particularly happened, yet it feels like the month just flew by.
I attended classes as usual, had dirty talk sessions with the boys in my class, got dragged around by my childhood friend, and was asked by the student council president to help with work.
…Come to think of it, that model acquaintance of mine seems to be really busy lately.
She’s been coming to school, but she keeps leaving early, so I haven’t seen her much.
Having work… must be a good thing for a model.
But is it all good for a student? I catch myself thinking that every time I hear her complain in messages.
(Come to think of it, she mentioned wanting me to go out with her the other day or something like that)
Or rather, she said it was a date.
Maybe because I have little experience with romance, just remembering that word makes my heart flutter a little.
And on top of that, the person in question is an active model.
There’s no way I wouldn’t be nervous. Even now, my heart is pounding wildly.
Really, there’s no way I wouldn’t be nervous—
“Come on, Tsukasa-kun… Let’s take a bath together with onee chan!”
…Well, I can’t quite tell if this fluttering in my chest right now is about the opposite sex or actual danger.
“Calm down, my sister… Let’s talk this through calmly!”
I—Irie Tsukasa—was currently standing against the living room wall, sweating bullets.
Before me stood my sister, Misato, already dressed in a bathrobe and ready to go.
How did it come to this? To grasp the situation, I searched through my immediate memories.
I’m sure it started with—
“Moou—there’s no ‘talking it out’! I said ‘If you lose rock-paper-scissors, you take a bath with me!’”
Why did I make a bet that crossed the sibling boundary?
“…I remember now. I think I said, ‘We’re almost out of soy sauce. Pick some up on your way back from college tomorrow,’ right?”
“Yeah, that’s why I wanted to rock-paper-scissors!”
My chip alone feels absurdly heavy.
“Hey, wait, don’t mess with me! You’re trying to make me take a bath with you over this?! Fine then, I’ll buy it on my way home!”
“No way. Rock-paper-scissors was played… and the winner was decided!”
“Dammit, why did I even play rock-paper-scissors…!”
For this luck-based game and such a cheap reward, what have I done?
Why did I foolishly challenge her to this contest? It’s beyond baffling.
“Well, calm down… Sure, it started with ‘Rock-paper-scissors or I’ll kiss you,’ and the winner was decided…”
If it’s blackmail, I guess it can’t be helped.
“Looking back, she’s the worst kind of sister, embarrassing me in every way possible.”
“But you get to bathe with such a cute girl? Honestly, if you were a boy, you should be sobbing with joy!”
It’s true. Despite being related by blood, my sister is exceptionally good-looking.
Our school has three outstanding beauties, but she’s just as cute and beautiful as them, with an outstanding figure.
I hear she’s already been confessed to by many guys at university.
Any man in the world would undoubtedly sob with joy, just as you said, and might even start hoping for more.
But—
“You are family, right?”
“Yeah, family.”
Thinking family would be happy about this is a huge mistake.
“It’s okay, it’s okay! onee chan won’t be embarrassed or anything.”
“That’s not the point! What are you talking about!?”
“But onee chan wouldn’t mind seeing your scars, right?”
───When I was little, I was a bit of a troublemaker.
I idolized heroes and kept imitating them, throwing myself into dangerous situations… My dark past.
The scars from that time still mark my body. Some people might find it a bit unsettling just seeing me naked.
“Haa, Tsukasa-kun just doesn’t get it… It’s only me, okay? The one who doesn’t mind your scars and can have that kind of physical closeness that crosses sibling boundaries.”
“I don’t need family members crossing those boundaries.”
“Ah, but maybe she wouldn’t mind, Yuzuki-chan? To her, they’d be like a hero’s medals!”
Well, she probably wouldn’t find it creepy if it were Yuzuki… but then again, we wouldn’t be taking baths together in the first place.
“Alright then, let’s get in the bath right away!”
Saying that, without waiting for my agreement or understanding, my sister slowly approached me.
Seeing her, I instinctively unlocked the window and then—
“Like I’m letting you get away!”
“Let me go!”
Just as I tried to climb out the window, my sister wrapped her arms around my waist.
“Get off me, you freak! What kind of grown college student still craves sibling physical contact!?”
“What are you gonna do? The bath’s already ready!”
“Can’t you just take a bath alone!?”
Just because it’s ready doesn’t mean we have to take it together.
Our household isn’t so strapped for cash that we have to worry about the water bill… Dammit!
“No way! I wanna take a bath with Tsukasa-kun!”
“Stop it! The window’s open!? What if the neighbors find out about our family’s shame and the crisis of our household collapsing!?”
───In the end, I somehow managed to force my sister into the bathroom.
She tried to escape a few times, but thanks to advice from my childhood friend, I’d recently installed a lock on the bathroom door, so she obediently got in the bath.
…It really was a relief.
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