Somehow I Ended up Dating the Perfect Female Classmate, but My Sister Found Out and They're Turning Into Yanderes

Chapter 111: First Time in Ages Walking to School with Rinka

Morning came anyway.

Today was the big sports festival day, and nobody was waiting around for anyone. Kirino had to head to school early as one of the reps, so this was my first solo walk to school in ages.

I went to the bathroom and washed my face and hair. The hair part was because I’d heard that bedhead could slow you down in the wind during the races.

“Morning, everyone… huh?”

In the living room, like always, Ayuka and Fuzuha were there, but for some reason Rinka was sitting with them today too.

I figured she’d already left since she was a first-year A-class rep.

“…What’s up, Kiyoto? It’s the actual sports festival today, but your face looks super unmotivated.”

“Well, for us third-years, the sports festival is kinda just a hassle, y’know.”

“Oh? So you’re saying you’re studying extra hard for exams? Funny, ’cause I’ve never once seen you actually focused and grinding away at it.”

Okay, fair. I do study for the exams (well, just the essay part) in my room or at cram school, but if you asked whether I’m really concentrating… probably not.

I’ve always had this thing where the second I sit down to study, my sex drive just kicks in hard. In my head, horniness beats focus every time.

“Um, so… Rinka, you don’t have to go in early today?”

“There’s no morning practice on the actual festival day.”

“No, I mean… aren’t you a rep…?”

“A rep? Nah, someone else is handling that.”

Whoa, so there’s someone in first-year A-class who’s even more of a natural leader than Rinka? Interesting.

“Besides, I’m planning to treat this sports festival as a little breather. I’m not gonna go all out like it’s life or death.”

…That actually surprised me a bit. I never figured Rinka would be this chill about school stuff, especially a sports event.

“That said… I’m not planning to slack off at all.”

Ah, yeah, of course she wasn’t gonna take it easy.

Yep, that’s our Rinka.

The real cool-girl type doesn’t hold back on studying, sports, or bedroom stuff either.

“Even so, this might be the last sports festival of your life for you third-years, right? So you better tighten up and give it your all. C’mon, hurry up and eat.”

Rinka rushed me, so I turned back to the food in front of me.

Right then, my eyes caught Ayuka sitting straight across from me. She was messing with something that looked like a camera, kinda sneaky.

“Hm?”

It was a pretty big, serious-looking camera.

Wait, was she gonna do what I think? Like that Kujima girl, trying to film me and Kirino?

If so, better not. Kirino’s totally against secret filming. She’d end up beating the crap out of you like she did with that Kujima girl. Of course, if Ayuka had my kinda constitution, there’d be no problem…

Anyway, Ayuka and Fuzuha have school today, right? It’s a weekday.

So that camera’s probably for some class project or whatever.

“Ah, I’m, uh, heading out now.”

Ayuka must’ve noticed me staring, ’cause she jumped up real quick and headed for the entrance.

“Wait, Ayuka. You haven’t finished eating yet.”

“Shut up! I’m in a bit of a hurry today… see ya!”

…Yeah, something’s definitely up with that.

Even if she’s not planning to secretly film me and Kirino, that camera’s gotta be for something I can’t even imagine.

…Wait, is she gonna film my penis exercises!? Like some kinda watch-me-while-I-do-it monitoring play?

…Okay, enough flattering myself. I could feel Rinka’s eyes basically yelling “eat faster” at me, so I started shoving food in my mouth.

“Aaah, thanks for the meal.”

My stomach wasn’t stuffed full or anything, but it wasn’t too little either. It was just the right amount for a sports festival morning. She must’ve planned it out perfectly.

“See you later.”

The second I finished eating, Fuzuha got up and left the living room.

“Here, today’s lunch.”

Rinka handed me the bento box.

Come to think of it, this feels like the first bento she’s made since second term started.

Rinka’s bentos… I don’t have the best memories with them.

I think the whole fight between Kirino and Rinka started from one of these bento incidents. That was the spark, and now it’s spread to other people too.

…Hold up, isn’t this kinda bad? Kirino’s definitely gonna bring her usual bento like always. And since it’s the sports festival, hers is probably even bigger than normal. So I’m gonna end up eating two full bentos. Then in the afternoon I’ve got the selected relay to run. I’ll be running with a heavy stomach, and all that bouncing’s gonna make everything come rushing back up. Basically turning into a vomit play.

Yeah… I better hit the bathroom right before the relay starts.

“Hurry up and get ready. I’ll be waiting at the entrance.”

Looks like walking to school together with Rinka was pretty much set in stone.

I grabbed my bag—which felt way lighter than usual—and headed down from the house.

“Alright, let’s go.”

It was colder than usual today.

“If you feel cold, just say so. I’ll share my body heat with you.”

I’d love that, honestly, but I have no idea where Kirino might hear about it, so I’ll pass.

—

Chapter 112: Kirino’s Wide Field of Vision

We reached the front of the sports ground together with Rinka.

She looked a little annoyed that I hadn’t asked her to warm me up.

“Well, uh, Rinka, I’ll catch you later.”

“Yeah. I’m looking forward to seeing you do well in the festival.”

I split off from Rinka and headed toward my class’s area.

The reason I ditched her right after we arrived was simple—I had no idea where Kirino’s eyes were. She probably never dreamed I’d walked to school with Rinka today. If she found out…

“//////”

I can’t exactly deny that part of me was kinda hoping for that exact situation.

“Third-year E class, third-year E class… there it is.”

I spotted the big flag with “Third-year E Class” written on it and walked over.

“Oh, Kiyoto. You’re here pretty early.”

The area had a tent set up and chairs lined up, and Kouta was already sitting there.

“What about you? What time did you even get here?”

“Nah, I just got here too. Man, I stayed up late last night so I’m kinda sleepy.”

Guys who say stuff like that are usually the ones who showed up an hour ago. Plus bragging about staying up late just sounds lame.

If you wanna get a better reaction from girls, you’re better off bragging that you don’t have a sex drive. …Maybe I’ll try that next time.

Not many other people had shown up to our spot yet. That alone showed how little motivation there was. I just hoped Kirino wouldn’t get pissed…

“Still, the first- and second-years are really something. Almost every class is already gathered and having meetings.”

Dude, you’re one to talk.

But Kouta was right—the first- and second-years this year were full of energy. Last year and the year before, we definitely weren’t like this.

There were even classes where more than half the students skipped and got banned from participating.

Come to think of it, this was the first year Kirino and I were in the same class, so I didn’t know what she was like before. I wonder how serious she was about the festival last year and the year before.

From what I saw, I don’t remember any class being super pumped up. That probably means Kirino wasn’t taking it too seriously either.

So why was she so motivated this year? Sure, it might be because it’s the last one of her life… but I bet me and Rinka being around had something to do with it.

“Hey, why are you opening an English textbook, Kouta?”

“Shut up. I don’t have a sweet girlfriend who teaches me and takes care of my sexual needs. I gotta use my free time like this.”

Wow, he’s actually pretty serious. So when he said he stayed up late, he probably meant studying late.

“Who’s the one taking care of your sexual needs, Kouta?”

“Nwaah!? K-Kirino-san!”

At some point Kirino had appeared right behind us and was listening to our whole conversation.

“Good morning, Kiyoto.”

“G-Good morning, Kirino.”

From the way she sounded… it didn’t seem like she knew about me walking with Rinka.

“So, Kouta, who’s taking care of your sexual needs?”

Aww man, you really stepped in it, Kouta. Kirino hates it when people assume stuff like that about her. Remember how mad she got when Ayuka called her a fuckbuddy?

“N-No, that’s not what I meant! When I said ‘sei’ I didn’t mean sex, I meant ‘life’ like daily life! I was talking about reviewing Kiyoto’s lifestyle habits!”

Whoa, his Japanese was getting really broken there.

“Hmm, well, whatever.”

By the way, when she says “whatever” like that, it doesn’t mean she’s actually letting it go.

“What I really need to talk about is you, Kiyoto. Can you come over here for a sec?”

Huh? What’s this about?

I followed Kirino anyway.

She led me to a quiet corner of the sports ground where hardly anyone was around.

“Sorry I couldn’t walk with you this morning.”

“It’s totally fine. I knew you had prep stuff as a rep.”

“Good, I’m glad you understand. So, about that…”

Kirino stepped closer.

Oh man, this trapped feeling is the best…