While I Was Shutting in My Room for One Year, My Parent Remarried and Now I’m Living Together With Super Beautiful Stepsisters

Chapter 28: Sudden Lucky Pervert Moment ♡

— The next morning

“When I’m feeling sad~ it’s not just me who’s hurt~!”

From behind the curtain, the unplugged sound of a guitar being strummed loudly echoed, along with lyrics that somehow reminded me of my relationship with Haruka.

Yuzuna, huh… Full of energy first thing in the morning.

Rubbing my sleepy eyes, I sat up and pulled back the curtain connecting my space to Yuzuna’s.

“Hey, Yuzuna, I said you could play as much as you want, but playing in the morning is a bit much… Whoa!”

I opened the curtain to scold her, but the moment I did, I saw Yuzuna sitting on a chair, strumming her guitar in just her underwear.

“B-Big Brother!”

Her light blue lace underwear, slightly sheer, gave off a calm vibe that contrasted with her usual gal-like appearance. Yet, her breasts were so large and mature it looked like it might burst out, blending both delicate charm and allure.

W-Woah, real boobs?! What?!

“How long are you gonna stare, you jerk!”

Yuzuna threw guitar picks at me like they were shurikens.

I dodged them and retreated to my room.

I mean, who’d expect her to be playing in her underwear?! That’s not normal!

“You perv, Big Brother! Creep! Sis-con! Total sleaze!”

Relentless insults flew from behind the curtain.

I’m totally the victim here…

“S-Sorry! That’s not it! I just thought the guitar was too loud in the morning, so I was gonna say something!”

“Oh… my bad, then.”

When I explained through the curtain, Yuzuna surprisingly understood and apologized right away.

She’s a good kid who listens when you explain things and doesn’t stubbornly refuse to apologize… but she does a lot of weird stuff. Her songs are kind of weird, too.

A little while later, Yuzuna, now in her school uniform, popped into my room.

“Big Brother, sorry about earlier. I got inspired and just had to play this morning.”

“Nah, I’m not mad. I’m the one who should apologize for opening the curtain without warning. And, uh, for seeing you in your underwear… Sorry, really.”

I added an apology for seeing her underwear to match her own.

“I was definitely shocked you saw me like that, but, well, let’s call it even. You got lucky, huh, Big Brother?”

“Lucky? Come on, you…”

To be honest, it was a lucky pervert moment, no question.

But I’ll keep quiet about the fact that this wasn’t my first time seeing one of the three sisters in their underwear…

“By the way, what’d you think of my underwear?”

“H-Huh?! What kind of question is that?!”

“I just wanna know what a guy like you thinks about it.”

What kind of curiosity is that?

“So, come on, what’d you think?”

“Well… I guess they were, uh, sexy-cute… maybe?”

“Huh? S-Sexy…? You’re such a perv, Big Brother!”

This just made things even more awkward!

“W-Well, consider it a thank-you for helping with my guitar yesterday. Lucky you, getting to see your little sister’s sexy-cute underwear ♡.”

“Don’t tease me!”

“Haha, your face is all red, Big Brother!”

“Shut up!”

Yuzuna’s getting as used to messing with me as Momiji is.

Ugh… I guess I bring this on myself.

“Hm? Wait, it’s already seven, right?”

“Oh, yeah. I gotta hurry and change.”

“No, not that.”

“Huh?”

Yuzuna stared at the door.

“Momiji usually comes to wake you up around this time, right? It’s weird that she’s late, since she’s so strict about time.”

“You’re… right.”

Momiji always shows up at exactly seven, wearing an apron and holding a ladle to wake me up.

But today, she didn’t… What’s going on?

“I’m gonna go downstairs and check.”

“Wait, hold on! I’ll come with you after I change.”

Worried, Yuzuna and I hurriedly went downstairs to the first floor, and then—

“Who are you to Aoto…?”

“I’m his big sister ♡. And who are you to Aoto-kun?”

“I’m like family to Aoto.”

“Like family? Hmm, well, I’m his real family.”

“What, you picking a fight?”

In the living room, a monster battle had erupted between my self-proclaimed big sister and my self-proclaimed family-like childhood friend.

Why is this happening first thing in the morning?!

—

Chapter 29: A Breakfast Turned Chaotic by Yanderes

“…”

Glossy black-haired childhood friend Haruka Mizuno and self-proclaimed older sister (actually stepsister) Momiji Itohara, with her long brown hair, stood glaring at each other. Their ample breasts pressed together repeatedly, like sumo wrestlers in a practice bout, sparking an inexplicable tension.

W-What the hell is going on…?

Yuzuna and I crept down the stairs, hiding ourselves and peeking into the living room with just our faces visible.

“Yuzuna, can’t you go in there and do something about this?”

“No way, Big Brother, you’re the one who should step in!”

“No, no, if I go, it’ll just make things even more complicated!”

“No, no, no, I don’t want to go in there!”

“No, no, no, no, I really don’t want to go!”

“Both of you, get out here already!”

“Eek!”

The voices and gazes of the two girls in the living room locked onto us.

Reluctantly, we trudged toward them with heavy steps.

Why did it come to this… ugh.

Yuzuna, acting all innocent, slipped off to the kitchen to grab breakfast.

Hey, don’t just abandon me like that…!

“Good morning, Aoto-kun. By the way, who’s this pitiful girl with smaller breasts than mine? She’s claiming to be part of your family or something?”

“Morning, Aoto. So, who’s this girl with unnecessarily huge breasts that guys probably wouldn’t even like? She’s claiming to be your older sister or something?”

The two traded verbal jabs with an intensity that belied their first meeting, their exchange feeling almost like a freestyle rap battle.

“I’ve got beautiful, moderately large breasts. Plus, Aoto prefers models with beautiful breasts over those with oversized ones. You claim to be his big sister, but you don’t even know his tastes? Amateur.”

“Oh, really? Having small breasts must make your heart just as small to get so worked up over something like that. Also, I don’t need a suspicious person claiming to be family lecturing me ♡.”

Their mutual dissing showed no signs of stopping.

Seriously, how did it come to this?!

“Hey, you two! Cut it out with this weird fight already!”

I rushed between them, trying to break up their argument.

But then, they both pressed their ample breasts against me from either side—hey, whoa!

“Calm down! F-For starters, why is this even happening?!”

I pushed them apart, keeping a safe distance while trying to move the conversation forward.

“She’s the one who started it, that self-proclaimed sister! I kept explaining that I’m like family to you, Aoto!”

“You’re just a childhood friend!”

“No, the one who picked a fight was that self-proclaimed family member over there! I was just explaining things as your big sister!”

“You’re my stepsister! God, you two are making this so complicated!”

Their craziness was on a level I could barely keep up with.

“I’ll ask one more time—what happened to cause all this?”

Exasperated, I pressed them again for an explanation.

“Well, this morning, when Mom was doing her usual towel-rubbing exercise in the garden—”

“Wait, hold on! Nanoka-san was doing towel-rubbing?!”

“Y-Yeah.”

If that glamorous body was doing towel-rubbing in the garden, it’d cause a scene that’d bring out both perverts and the police!

“She was properly wrapped in a towel, you know?”

“That’s… still not okay!”

“So, while Mom was doing her towel-rubbing in the garden, she saw a figure at the front door around 5 a.m. Thinking it was the newspaper delivery, she rushed over, and apparently, it was her.”

Momiji pointed at Haruka.

I see… Haruka’s always been an early riser, coming over to wake me up since we were kids.

“Aoto, you said I could come over anytime, every day, no matter the hour, just like before!”

Every day? Any hour? That sounds… exaggerated.

“Anyway! I may not be real family, but I’m your childhood friend, Haruka Mizuno! There, I introduced myself properly, so now it’s your turn!”

“…I-I’m Aoto-kun’s s-s… stepsister, Momiji Itohara.”

With proper introductions made from their respective positions, it seemed like the issue was resolved… or so I thought.

“Itohara? Wait a second… Yuzuna-san, over there?”

Yuzuna, casually eating breakfast at the table, flinched when Haruka suddenly called her out.

“You, introduce yourself too.”

“Huh? Me? I’m Yuzuna Itohara, but…”

Haruka’s expression turned serious, and then her eyes lit up as if she’d realized something.