Somehow I Ended up Dating the Perfect Female Classmate, but My Sister Found Out and They're Turning Into Yanderes - Chapter 107-108

Chapter 107: After-School Practice (2)

“Alright, today we’re practicing the everyone-participation 100-meter dash.”

Just like yesterday, after-school practice continues today.
That said, it looks like Kirino’s the only one who actually has any motivation.

Most of my classmates have zero energy on their faces.
They’ve probably figured out what happens if they go against the current Kirino though.

“So we’ll use the 100-meter times we measured during PE class to give guidance.”

The 100-meter dash looks short at first glance, but when you actually run it, it feels like it never ends.

What was my time again?
I don’t think I was dead last in the class or anything.

“Okay, line up in the order I just said.”

In the end I ended up a little faster than average, so I’m lined up a bit behind the middle.

…The classic should be me in last place and Kirino in first, the physical-ability-reversed couple.

By the way, Kouta was dead last among the boys.

“Hmm, let’s see… when doing the start dash—”
“You should improve your form a bit more.”
“Keep your posture low until the middle section—”
“You seem to lose speed a little in the second half—”
“Keep running even after you cross the finish line.”

Kirino gives instructions to each classmate as they run.
She really knows her stuff since she used to be in the track club.

They probably thought at first that Kirino would touch their bodies and teach them directly, but too bad.
That special privilege belongs to me alone~

“Okay, next is you, Kiyoto.”

“Y-yes, please take care of me.”

“First show me your crouching start.”

I get into the crouching start position right there like Kirino told me.

Man, this pose is kinda erotic.
It’s like sticking your butt up high.

“…Mmm~”

Kirino stares hard at my crouching start.

“Excuse me for a second.”

After watching for a while, she suddenly grabs my waist.

“Hah//”

““““““““““““!?!””””””””””””

Everyone in class, including me, holds their breath at that move.

Wait, this is… does that mean what I think it means!?
Grabbing my waist from behind… does that mean I’m about to get turned into a girl right now!?
Yes please, do it!
Please use your strong hips to make me your girl, Kirino!//

“You should raise your butt a little higher.”

Kirino pulls back strongly.

“Ahh//”

That sound that makes everyone’s dick instantly grow… didn’t happen.

“Yeah, this height is about right.”

Once Kirino confirms my butt is high enough, she lets go of my waist.

“……”

W-well, I knew it.
There’s no way something like that would happen here.
If she really grabbed my waist and turned me into a girl right in front of everyone, it’d be national news.

“Okay, Kiyoto, run the 100 meters for me.”

At Kirino’s signal I start running from the crouching start.

“——————”

While I’m running I can’t even hear my own breathing.
But the crouching start Kirino taught me directly seems to have made a big difference.

Normally I’d run out of stamina around the middle and start slowing down, but this time I managed to finish without dropping speed.
Actually, I might’ve even set a new personal best?

“Amazing, Kiyoto! Your pace is way better than before.”

The second I finish running, Kirino praises me.

“Nah, it’s all thanks to the crouching start you taught me.”

“Yeah yeah, I only taught you the start dash. The fact that you made good use of it is all your own power, Kiyoto.”

I-is that so~?
Well, it doesn’t feel bad to be told that~

““““““““““““………””””””””””””

Huh? What’s with you guys?
Are you jealous?
Yesterday you were looking at me with pity and now this.

“Okay, next I’ll fix your form more specifically.”

Eh? You’re still spending time on me?
There are still quite a few people behind me though…

Nah, I should just be grateful that Kirino is putting me first like this.

“Alright~ Run from the crouching start again.”

“Eh? A-again!?”

“I said I’d teach you the form, remember? Don’t worry, I’ll stop you partway.”

Honestly running again uses up a decent amount of stamina, so even if it’s only halfway I’d rather finish in one more try.

I get into the crouching start with my butt high like Kirino taught me.

Then, at her signal, I start running.

“———!”

It definitely uses more stamina than the first time.

“Okay, stop stop.”

Kirino calls stop right as I’m about to reach the middle section.

“Hmm, right here—”

“Ah//”

This time Kirino teaches my form by hugging me from the side.

“Don’t sway your body too much, and don’t raise your arms too high.”

“Ahh//”

Kirino’s chest presses directly against me.

Not just her chest—her whole body is glued to mine, and I can feel her perfect figure up close.

“Oh, and also—”

While she’s supposed to be teaching form, Kirino lowers her posture a bit.

“It’s better not to let ‘this’ get too big while you’re running. It’s pretty fatal.”

“……”

She finally noticed… or rather, from the way she said it, she’s probably known for a while…

Kirino’s words didn’t just embarrass me—they made the whole class super awkward.

—

Chapter 108: After-School Practice (3)

“Okay, today we’re practicing the three-legged race and tug-of-war.”

Three-legged race I get, but do we really need practice for tug-of-war?
Well, I guess we do.

“For the three-legged race, I picked the pairs based on who has similar 100-meter times.”

Hmm, my case is kinda tricky.
I’m a little faster than average, so… it’s hard to say whether I match anyone or not.

“Alright, I’ll announce the pairs now.”

Kirino starts calling out two names at a time.

From the order, it looks like she’s starting with the slowest pairs.

“And the last pair is Kiyoto Nuregami and me, Kirino Kinui.”

Oh, so it’s me and Kirino…
Yeah, why?

First of all, I’m shocked I even got picked, but why pair me with Kirino?
Our times are totally different.

A lot of other classmates seem to feel the same way, but

“What’s wrong? Got a complaint or something?”

In front of the current Kirino’s reign of terror, no one can even voice an opinion.

“So first, the pairs I just announced should practice together. I’d love to teach you like I did yesterday, but I’m not that used to three-legged race myself, so I need to practice too. Everyone else, review yesterday’s 100-meter stuff. Alright, Kiyoto, let’s go.”

Kirino and I decided to practice in a spot not too far from the class area.

“Kiyoto, put your left foot forward.”

She ties my left leg to her right leg with the rope.

…Skin touching skin is kinda exciting on its own//

“Okay, first you take the lead and move, Kiyoto. I’ll match you.”

“U-uh, sure.”

Ah, it’s fine if I take the lead for three-legged race, but at night I want you to take the lead, Kirino//

I try to run at a slightly faster pace than usual so I don’t burden her.

Wait, huh?

I’m moving forward way easier than I expected.
Aren’t you supposed to have trouble running when your legs are tied together?

I look down at our legs and see that Kirino is perfectly copying my movements.
She’s running at exactly the same pace like we’re one body.

Maybe our bodies really are “directly connected.”

“We’re perfectly in sync!”

Kirino sounds genuinely happy, but I can tell she’s desperately holding back her own power to match my pace.

“So on the day, unless something changes, you can take the lead, okay?”

“Y-yeah, sure.”

If Kirino took the lead I’d obviously just get dragged along.
So it makes sense for me to lead.

We finish three-legged practice pretty quick and head back to the class area.

A little while later the other three-legged pairs start coming back too.

“Okay, everyone’s back. Let’s move on to tug-of-war practice.”

I’ve been wondering this whole time—how do you even practice tug-of-war?

“Let’s start by splitting boys and girls and having a match?”

…Does that even mean anything?
Well, me and my old comrades dream every day of transferring to a world where everything is gender-reversed and guys lose to girls, but realistically, if boys and girls pull against each other it should end super fast…

Wait, hold on.
There’s a joker on the girls’ side who ignores all power differences—Kirino.
I feel like even if it’s Kirino versus the whole class she’d still lose on purpose.

“Hey Kiyoto, what’s your girlfriend thinking? Boys versus girls has way too big a gap, it doesn’t mean anything.”

Because idiots like Kouta are raising death flags, the result is anyone’s guess.

And the result was

“W-wait, did we really become this weak?”
“We don’t even do club activities but we’re this much of a bunch of wimps?”
“Maybe I transferred to a chastity-reversal world.”
“Rejoice, guys! Our class has finally transferred to the long-dreamed gender-reversal world!”

Yeah, just like you heard, we boys lost normally.

Actually, we were overwhelmingly winning for most of it?

But right when we were one step from victory

“I think I’ve got a good grasp on everyone’s strength difference.”

Kirino’s observation time ends with that signal, and we lost in seconds after that.

Also, since we lined up from shortest to tallest, I got to see Yoshirin’s desperate dying face and it was hilarious.

After tug-of-war ended, Yoshirin noticed I was holding back laughter and glared at me like she wanted to gouge my eyes out, but she can’t do anything in front of Kirino.

“Okay, everyone pay attention. I think you were lined up from shortest to tallest earlier, but for tug-of-war it’s better to pair strong and weak people next to each other. From your expressions and how your hands were shaking I roughly figured out everyone’s strength, so I’ll rearrange you evenly.”

Amazing.
She figured out everyone’s individual strength in such a short time.

“———”

Kirino starts calling out classmates’ names again and they line up in that order.

“And at the very back, Kiyoto Nuregami and me, Kirino Kinui.”

Yeah, so why?

And why are we the only ones getting full names?