Classmate wa Isekai de Yuusha ni Natta kedo, Ore dake Gendai Nihon ni Okizari ni Narimashita - Chapter 121

Chapter 121: I Ended Up Introducing Her to My Little Sister (Part 3)

“——”

My sister, completely off-guard, entered the living room but froze on the spot when she saw Kyori.

“H-hey, are you okay…?”

“C-come here!”

Worried, I called out and approached Kana, who suddenly snapped back to reality, grabbed my hand, and pulled me into the hallway.

“W-who is that person!? Why is my big brother with a woman!? Did you maybe use some weird service!? How much did you pay!?”

“Hey, what do you take your brother for?”

“Ouch!”

I lightly flicked her forehead to snap her out of her strange, confused fantasies.

“Calm down?”

“...For now, yeah.”

When I checked, Kana rubbed her slightly reddened forehead but seemed somewhat calmer.

“I told you before, right? That I got a girlfriend. That’s her.”

“Wha... what...? You’re serious? That wasn’t some fantasy or bragging?”

“Yeah, I’m serious. Besides, it’s just embarrassing to lie about having a girlfriend to your little sister.”

“Well, yeah, that’s true…”

Still, Kana seemed half in doubt about what I was saying.

Well, I also feel it’s almost a miracle that I’m actually dating Kyori, so I understand her feelings.

“By the way, weren’t you supposed to be at the dojo today?”

“The teacher hurt their back, so practice was canceled and I came home. Then I saw my big brother... um, you, hanging out closely with a beautiful woman, and I was really shocked.”

Kana suddenly realized she’d been calling me “big brother” (onii) and switched back to the more formal “nii-san” with a cold attitude.

Still, the dojo was closed... that’s convenient.

“A-anyway! You can’t just leave your important girlfriend alone! I’m going upstairs, so—”

Saying that, Kana hurried off to her room upstairs, probably trying not to bother us.

“Wait, wait! I was just about to talk about something related to you. If you have time, can you stay a bit?”

“Something related to me…?”

◇◇◇

“Okay, let me introduce you again—this is my little sister, Kana. Kana, say hi.”

“Uh, um… I’m Iori Kana. Nice to meet you.”

“Nice to meet you, I’m Kuon Kyori. I’m dating your big brother.”

I urged Kana to greet her, and she bowed politely.

Kyori smiled like a goddess.

“So, what’s this thing related to me, nii-san?”

“Well, sit down. It’s a bit of a long story.”

“…Okay.”

Honestly, Kana probably didn’t want to listen to my story.

But Kyori was here—her brother’s girlfriend, a stranger with a seriously difficult title.

Kana, now a middle schooler, understood that complaining outright would be bad.

Though her displeasure was still clear.

“First, do you know about the joint social studies field trip?”

“Yeah, I know. We’re going to see a ship or something? The teacher said they’d explain details tomorrow.”

Oh, she hadn’t gotten the details yet.

No matter—better to just tell her everything now.

“To be blunt, you and I will be in the same group on that field trip. And on top of that, I’m the leader of the group.”

“...Huh? Sorry, I didn’t hear that well. Can you say it again?”

She definitely heard me, but seemed unwilling to accept it and asked again with more irritation.

“I’m the leader of your group on the field trip. Got it?”

“Wha-what? No way! Why do you even know that!?”

“I was told first during homeroom today. That’s all.”

“…This is the worst. So embarrassing.”

Kana buried her face in the living room table.

I’m just as embarrassed to be with my own sister in school.

If I could, I’d change it.

I even thought about using ‘Cognition Inhibition’ to change it—but I promised Kyori I wouldn’t, so no way.

“Well, there’s one more thing you need to know…”

“Ugh, still more?”

“This is Kuon Kyori… She’s also in our group. Also, our classmates know we’re dating.”

At this, Kana looked up to the sky.

Her older brother in the same group on the field trip, and his girlfriend too.

I’m sure her classmates will be very interested—and probably tease or bombard her with questions.

It’s shaping up to be the worst field trip of our lives.

“That’s why I thought it’d be better to prepare in advance, instead of just winging it on the day. Figuring out how to deal with things beforehand will make things easier.”

“That might be true, but…”

Kana still looked unhappy.

“Big brother… nii-san, go to your room upstairs. I have something I want to talk about with Kyori!”

“W-wait, why do you—”

“Just go! Out!”

She practically kicked me out of the living room.

For the future, I guess it’s better to just quietly obey Kana.

With a sigh, I headed to my room.

◇◇◇

Side: Kana

“Phew…”

After kicking big brother out, I took a breath and hurried to Kyori-san, who looked troubled by the sudden commotion.

“Sorry for the trouble. There’s something I really want to ask…”

“Y-yes, what is it?”

“Are you really dating big brother? Did he force you or order you to do this or something?”

Kyori-san smiled softly.

“No, not at all. I truly like your brother and we’re dating willingly.”

“Um, what do you like about him? After all the weird stuff he did after he was discharged from the hospital…”

“Everything. He’s cool, respects my choices, and has a strong will to protect me. If I told you everything I love about Shu-kun, we’d be here all night. I really love him.”

Kyori-san’s words truly felt genuine.

She was so happy and sincere talking about what she liked about my brother—I couldn’t believe she was acting.

So I thought…

“…Kyori-san, if big brother ever does anything weird or cheats on you, you better punch him without mercy! Also… please take care of him.”

“…Yes, I promise.”

As Kyori smiled brightly, I felt a complicated mix of frustration, loneliness, and other growing emotions inside me.

(So, he’s not just my big brother anymore…)

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Note: This is the last available chapter for this web novel updated on 2025.01.03. Thank you for reading until now.