Gloomy Outside, Gal Inside ~Dealing with My Step-Sister Isn't Easy~ - Chapter 04: She's Surprisingly Considerate at School

Chapter 04: She’s Surprisingly Considerate at School

Lunch break came quickly that day.

As I was eating lunch with Toshinobu, he was once again excitedly looking at an image on his smartphone.

“You really like her, huh?”

“Well, yeah! I mean… Is this girl really around the same age as us in high school?”

I wondered what image he was looking at, and it turned out to be a selfie photo uploaded by Myuu… Miu.

It was a provocative photo where she was wearing the pajamas I saw her wearing last night, covering the tips of her breasts with her arms alone. It was quite stimulating.

“What are you looking at?”

“Oh, Rikiya, you came at the right moment.”

Perhaps because Toshinobu was so excited, another classmate came over.

He was also a friend and a bad influence on me, his name was Rikiya Araki. By the way, he had a girlfriend.

“Take a look at this.”

“Huh? … Oh!?”

The moment Rikiya peered into Toshinobu’s smartphone, his face turned red, and he quickly backed away.

Rikiya had a somewhat delinquent appearance, but he was quite innocent and would react like this to slightly erotic things.

“What the hell are you looking at during lunch break…”

“Well, I happened to stumble upon it yesterday. After all, we’re at that age… It’s natural to come across stuff like this.”

“Well, I can’t say I don’t understand…”

Anyway, Rikiya, your girlfriend is staring at you intently.

I conveyed with my gaze to Rikiya, and he trembled and headed towards his girlfriend.

“That guy’s girlfriend is scary, right?”

“Shinozaki-san… Well, but Rikiya surprisingly has a side that seeks affection, so he suits that kind of bossy girl.”

While saying such things, Toshinobu showed me his smartphone.

In front of me was a face wearing only a mask to hide it… Yet, it was completely transformed into the very existence of Myuu, even though it was just a disguise.

“Don’t you think it’s great?”

“…I do.

As I answered, Toshinobu put his arm around my shoulder.

It’s frustrating… It’s frustrating, but it’s only natural to think that way. If I were to tell Toshinobu that this girl is actually my sister, he would probably just think I’m joking.

Toshinobu knows Miu, but he only knows her as she usually is, so he would never connect Miu with Myuu.

“This… She definitely has a G-cup, right?”

“Well, she probably does.”

While answering like that, a certain memory resurfaced in my mind.

Miu, who for some reason came to show off her new underwear, held the straps supporting her breasts with her fingers and said while swaying them.

“Ta-da! Look, H-cup boobies~♪”

“Get outttttttt!!”

I told her to get out at that time, but to be honest, I wanted to see a bit more… Sigh.

By the way, this happened about three weeks ago, and Toshinobu’s guess is a bit off… Oh? Is it because I know a little secret that I feel a sense of superiority?

“Well, even if you’re excited, don’t show it off too much, okay?”

“I know. I don’t want to become like those guys commenting on it.”

If it comes to that, I’ll seriously cut off our friendship.

Well, though if the people commenting on Miu’s selfie uploads were genuinely saying things like “cute” or “beautiful,” it would be one thing, but there are also some who write truly disturbing things that are hard to even look at.

They only have seen photos in which they haven’t even heard her voice or seen her move, and yet they act like they’re her boyfriends. That’s the nature of the internet, I guess.

“I’m going to the toilet.”

“Sure thing~”

I informed Toshinobu and got up from my seat.

When I finished using the restroom and was about to return to the classroom, I saw a face that I usually never see on this second floor where our second-year classroom is located.

When I saw her walking with a large bag, I quickly ran towards her.

“Miu!”

“Huh? Nii-san?”

Yes, it was Miu who was carrying that bag.

With messy hair and round-framed glasses, her appearance was nothing like what I see at home.

“I’ll carry it.”

“Are you sure?”

“Yeah.”

I immediately took the bag from Miu.

Miu was probably heading towards the audiovisual room, I assume? When I asked, Miu nodded and followed along.

“Some classmates asked me to leave it on the desk because they were busy. So I had no choice but to do it, I guess.”

“That… is it—”

“Oh no, it’s not like that. It’s definitely not something like middle school, so don’t worry. That girl seemed genuinely apologetic, and I was free too, so…”

“…I see.”

At times like this, I can’t help but recall the past and my sense of caution suddenly intensifies. 

Since there was a history of Miu enduring things to avoid worrying us when she was bullied in the past, as her older brother, I naturally became concerned.

Perhaps sensing it from my expression, Miu chuckled softly and murmured quietly.

“Thank you, Nii-san.”

“Yeah.”

Alright, let’s quickly move the luggage then.

It’s unusual for first-year students to be on the second floor, and Miu walking alongside me attracts some attention, but it’s not too excessive. 

The current her is completely in introvert mode, and the plainness of her glasses, devoid of any fashionable flair, completely overshadows Miu’s charm… However, her noticeably large breasts, even when covered by a cardigan, draw the attention of male students. It was a bit annoying to be noticed even by classmates known for their wandering eyes.

“I’ll open it.”

When we arrived at the designated audiovisual room, Miu opened the door for me.

I went inside and placed the luggage towards the back… and that should be it. But suddenly, Miu hugged me from behind and made this suggestion.

“Hey, Nii-san. Are you going back right away?”

“…No?”

“Then let’s stay here just for a little while.”

“…”

And so, I ended up spending some time with Miu. 

However, even though she hugged me from behind and made the suggestion, since this wasn’t our home or a private moment, she quickly established a clear boundary and let go.

“It would be nice if you showed that consideration even at home.”

“Huh? I’m doing it because I know it makes Nii-san happy, right?”

I couldn’t even retort. It seems like I was the one putting up a front.

My face turned slightly red, but Miu didn’t notice as she was looking at her phone and not at me.

“…Actually, you know,”

“Yeah?”

While glancing at her phone, Miu stole occasional glances at me.

Fidgeting with her hair in a somewhat shy manner, she continued to gaze at me and spoke.

“To be honest… I was secretly hoping that Nii-san would come. I didn’t say anything, but I just had that feeling.”

“Oh… Haha, well, I wouldn’t have noticed if I hadn’t gone to the restroom.”

“Is that so?”

“Yeah. Perhaps I held it in there just for the sake of Miu.”

“That’s a little annoying.”

Covering her mouth with her hand, Miu chuckled.

I couldn’t help but smile in response, and although I felt bad for Toshinobu, I decided to tell her.

“You know, Toshinobu…”

“What’s up with Murakami-senpai?”

“He found you on Twitter, and he got super excited.”

“Ahaha! Really? He must be saying nothing but things like ‘her breasts are big and erotic,’ right?”

“You understand him well.”

“Well, Murakami-senpai seems like that type.”

Since Toshinobu occasionally visited our house, he was familiar with Miu as well.

But even at home, when someone came over, Miu would switch to introvert mode, so Toshinobu didn’t know the real her.

“Hey, can I come closer to you for a moment?”

“I don’t mind.”

…Miu is truly considerate in this mode.

She pulled a chair next to me, rested her head on my shoulder, and stayed there, looking satisfied without moving.

We spent some time like that, and in about ten minutes, lunch break would be over. 

At that time, we both left the audiovisual room together.

“Nii-san, you had a slightly scary expression when you came here, you know?”

“Huh?”

Was she talking about when I saw that bad guy leering at her?

I didn’t think I showed it on my face, but it seems Miu noticed the change in my expression.

She twirled around and flipped her skirt before turning back around in front of the stairs leading downstairs.

“Don’t worry♪ I’m not the kind of person who’s affected by a gaze like that, and besides, I have a reliable Onii-chan by my side♪”

“…Haha, you little devil.”

“Well then, see you later!”

Watching her leave with a brisk pace, what I thought was that she had indeed become stronger, and I felt genuinely impressed.

It’s something that shouldn’t happen, but Miu has become so strong that she could brush off any harassment from someone.

“Well then, should I go back to the classroom?”

Perhaps because I had spent time with my sister, when I returned to the classroom, I seemed to be in a very good mood, at least according to Toshinobu’s perception, and it was a bit embarrassing.

[Postscript]

Starting from tomorrow, I will update one chapter at a time.