Want to Hear the Story of How I, a Mob Character, Got Attacked After Calling the NTR Heroine a ‘Damn Bitch’ in a NTR Erotic Game? - Chapter 11-12: If It's My Sister's Request, Then Anything—Wait, What?

Scrub scrub scrub scrub.

Systema really was the best toothpaste after all.

In the morning, I brushed my teeth at the sink, where my ordinary face was reflected in the mirror. Meanwhile, I vaguely thought about what was ahead.

I’d thwarted the first-kiss NTR attempt, but that had only delayed the first step towards the affair.

I wanted to keep interfering, but if I monitored those three every day, that would definitely make me a stalker.

Having a physical body that could move freely came with restrictions—a hardship that didn’t exist when you were watching from behind a screen.

Since then, I’d been keeping an eye on them at school, and it seemed like Isamu and Haruka had become even more lovey-dovey than before.

As for Nanaka, her interactions with the two had decreased slightly. Not because she’d given up. It was probably—

“Big brother, move over a bit.”

“Oh, ah, sorry sorry.”

Come to think of it, I was in the middle of brushing my teeth side by side with my sister like good siblings.

“Don’t watch me while I’m rinsing, okay?”

“Of course not.”

I turned my back to the mirror. Really, my sister was cute today as well.

“Hmm, I’m done. Your hair’s gotten longer.”

“Has it? There are a few guys in class with about this length too…”

“Your hair is covering your ears, and what others do doesn’t matter. You’re being sloppy. You need to pay more attention to the specific length of your hair.”

“Eh… Well, if Mina says so, I’ll cut it. Maybe I’ll be popular if I cut it?”

“Huh? Thinking you’ll be popular just by cutting your hair is so gross. Big brother is fundamentally disappointing, so you won’t be popular even if you cut your hair.”

“You’re as blunt as ever today, hahaha!”

“…Besides, I don’t want you to be popular with other girls.”

“Did you say something?”

“I didn’t say anything! Are you hearing things?!”

That tsundere response, how delightful.

I rinsed my mouth, feeling refreshed, then we had breakfast in the living room.

“It’s Saturday today, do you have any plans, Mina?”

“I do.”

“I see, so big brother will be lonely at home today.”

“Huh? You’re coming too, big brother.”

“Hmm? Where to?”

“…Don’t tell me you forgot? Even though you were bragging ‘It’s for my cute sister!’ with that smug face.”

Mina frowned, looking displeased.

Come to think of it, she did say something, but I had no idea what we were talking about.

“Seriously, big brother, you’re the worst… I was looking forward to it.”

“Sorry, Mina! Big brother will devote himself to you today, so could you please tell me what today’s plans are?”

I put my hands together and bowed my head.

“Devote yourself, huh… W-well, if that’s the case, then fine…”

“Thank you!!”

What kind of plans were these? Were we buying brand-name items? C-could it be she was going to introduce her boyfriend…?

“Today, I’m supposed to go on a double date with friends from school, so big brother will be my… um, boyfriend. B-but only for today!”

W-well, if it was my sister’s request, then anything—Wait, what?

“Wait, what?”

I think I heard some shocking words like “playing boyfriend” just now…

“I! Said! We’re going on a date now!!”

Are you serious, little sister…?

Chapter 12: Pretending To Be My Little Sister’s Boyfriend!! ①

“Big brother, hurry up~!”

“Just a moment, please!!”

It was 9:30 in the morning. From the entryway, I could hear my sister’s urging voice. It wasn’t that I was late. Mina was just too early.

“What should I wear… This one? No, maybe this one would be better… Shotaro, you seriously lack variety in your clothes… there’s nothing but black.”

Looking back, she had been strangely fidgety last night. Dinner was even karaage, which I had highly praised… Was she that excited about going out with her big brother?

I quickly got dressed, fixed my hair, and headed to the entryway. There, a different Mina was waiting…

“W-what?” 

A knit dress with heel mules that showed off her beautiful skin. The skirt of the dress wasn’t very flared and fell just below her knees. It emphasized the beautiful silhouette of the top portion.

Her hairstyle wasn’t her usual side ponytail either; she had let her hair down to her shoulders.

Looking at Mina’s fidgety, restless expression, I said with a full smile, “It really suits you! I’m smitten!”

“S-smitten!? Are you stupid?! Falling for your sister…”

Despite her words, she was cute as she smiled happily.

We walked to our destination station while chatting.

“So, how exactly was I selected for the boyfriend role?”

“That’s… well… Actually, at school, my friends and I were talking about relationships, and then…”

“My boyfriend is super cold to me, and I’m always worried if he really likes me or not. What about your boyfriend, Mina-chan?”

“Huh? Boyfriend?”

“Oh, maybe… Mina-chan, you always get confessions, so I thought for sure…”

“O-of course I have one! A boyfriend who’s two years older than me!”

I see. She had just been showing off.

“Sorry for showing off!”

Oops, I must have said that out loud.

“Well, for a reason like that, big brother is the best choice.”

“That’s because I can only do this with you, big brother…”

“Hm?”

“Nothing!”

When we arrived near the station, I saw a girl waving and a guy standing next to her with his hands in his pockets.

“Mina-chan! Over here~”

“Shiori! Sorry, did you wait?”

“No, we didn’t. We just got here too.”

The girls grabbed each other’s hands and excitedly chatted away.

I made brief eye contact with the refreshing-looking boy next to her and gave a slight bow.

Today, we were apparently going to an amusement park in the neighboring town by taking a series of trains.

As I followed the two in front of us, suddenly, Mina clung to my right arm. Though not exactly large, her chest had a feminine softness that pressed against my arm, making my heart skip a beat.

“Um, Mina…san?”

“W-we’re pretending to be a couple today, so more skinship… is necessary. Otherwise, they’ll get suspicious, right?”

“That’s true… Hmm, feel free to cling all you want.”

“Don’t get carried away! …At least get a little excited, stupid.”

“…”

While I maintained a calm exterior, my heart was actually racing. Not just from the sensation of her breast against my arm, but Mina’s face was too close! She was already cute, but with makeup to match her outfit, she had a different atmosphere than usual.

But I wouldn’t let her keep making my heart race without doing something about it. That’s not what a big brother did.

Time to counterattack!!

“Hey, Mina. Today I’m your boyfriend, right? So that means you’re my girlfriend.”

“I-I guess that’s right…”

“Then, isn’t it strange to call me ‘big brother’? Call me by my name.”

“Ehhh?!”

Counterattack successful. Mina blushed and became flustered. Though her mature atmosphere was broken, this was cute too. My tsundere little sister was cute.

“But a brother-complex Mina-chan can’t do it~ Oh dear, we’ll be found out immediately~”

“I-I can say it…! Don’t underestimate me! …I’ve been practicing in secret all this time…”

After taking a breath, Mina looked up at me seriously and…

“Then I’ll say it, okay? Um… Sh-Shotaro…kun?”

Gah!!!! Kun? What was with that cute question mark?! 

The combination of her chest against my arm and her upward glance was the ultimate combo that nearly sank my rationality… I really will fall for you, damn it!!

While I maintained my composure on the surface, I wondered if I’d be okay for the whole day. This might be more challenging than whether we’d be found out or not…

Hang in there, me! Hang in there, Shotaro!

.

.

“That’s… hmm… interfering with other people’s love lives while sneaking off on a date with his girlfriend… hehe, I can’t let that slide.”