Chapter 39: Pool Class (Part 3)

After Fumika walked off, I resumed changing.

More than anything, the feeling of having nothing on below made me incredibly uneasy. I wanted to get my under-shorts on as soon as possible.

I slipped the panties I had taken off earlier under the skirt in my locker, then pulled a simple beige pair of under-shorts from my bag.

Whenever I bent forward, my butt would peek out, and I’d tried a few ways to fix that, but in the end, I gave up and just hurried to put them on.

While covering my front, I slipped one foot and then the other into the shorts and pulled them up.

I felt eyes on me, but once I had my underwear on, I could relax a little.

…I really need to go to the bathroom, so let’s hurry this up.

After that, I stepped into the swimsuit and pulled it up to my waist—then paused again to consider what to do next.

I glanced around and saw girls undoing their bras and threading the swimsuit straps in through the sides of their camisoles, or changing underneath wrap towels, or just quickly undressing and getting it over with. Everyone had their own way of doing things.

I quietly enjoyed the view of the girl who boldly undressed without hesitation. Having already been ogled myself, I’d lost any sense of guilt about looking.

Wrap towels are nice… I should ask to get one before the next pool day.

But for now, I had to figure out what to do today.

…I guess I just have to charge straight through.

I wasn’t exactly great with my hands. Instead of fumbling around and wasting time, it made more sense to just change quickly and minimize the damage.

I began unbuttoning my blouse from the top down.

I tried not to think about the stares. …Even though I had a strong feeling some girls who’d already changed were still hanging around, watching me. But I told myself it was just my imagination.

I slipped off the blouse and placed it on the bench. Then, letting the straps of my camisole fall from my shoulders one by one, I dropped it to the floor.

The atmosphere around me rippled again.

Now that I thought about it, I’d worn a half-top today—a beginner’s bra, basically. The others were all wearing real, adult bras, and I was the only one dressed like a kid. That realization made me feel intensely self-conscious.

If I’d known ahead of time we’d have pool today, I would’ve worn something more mature…

Blushing, I lifted both arms above my head and pulled off the half-top in one quick motion.

After placing the removed item on the bench, I let out a small breath.

…There. At least no one saw the kiddie bra. That’s a relief.

But strangely, the atmosphere in the room seemed to be buzzing even more than before.

I tilted my head, confused.

"Alice—your chest! Your chest!!"

“!?”

Yuna’s shout made me scramble to cover my chest with both arms in a protective hug.

This is the part I really shouldn’t have shown!!

While I froze in that awkward pose, Yuna—now fully changed—stepped in front of me and spread a bath towel out like a curtain.

"…Yuna…"

“What’s with that pathetic voice? Here, I’ll cover you. Hurry up and get changed already.”

I pulled up the swimsuit and slipped the straps over my shoulders one at a time.

I adjusted the position and shape with my hands… Okay. This should be fine now.

With the whole ordeal finally over, I slumped down onto the bench, drained.

"…Are you okay?"

"Ah, yeah… Thanks. I’m okay now. It’s like all the tension just drained out of me…"

"I’ll help you with your swim cap."

I nodded and let Yuna take care of me.

She slipped the cap over my head and tucked my bangs and side hair in. Her fingers brushed against my face, and it tickled, making me squint slightly.

Then she gathered up the rest of my hair at the back and tucked that inside too.

Before I knew it, the changing room had mostly cleared out. It was just about time for class to start.

"All done! Let’s head out, then."

Thanks to Yuna’s careful work, all of my hair was now neatly tucked into the swim cap.

"Ah, right. Wait a sec—I need to go to the bathroom real quick."

Leaving that behind, I dashed toward the girls’ bathroom just next to the changing room.

“…Wait—Alice!?”

Yuna tried to say something, but I didn’t have time to listen.

The girls’ bathroom was empty.

I went into one of the stalls—then suddenly realized something.

"…Wait, how am I supposed to do this?"

I patted around the stomach area of my swimsuit. There didn’t seem to be any kind of opening. While I stood there flustered by this unexpected situation, Yuna’s voice called from outside the stall.

"Alice, you idiot! You can’t use the bathroom without taking the whole swimsuit off!?"

"Eh...?"

The moment I was hit with that crushing truth, I froze.

I looked down at the navy-blue swimsuit I was wearing.

...I really have to take all of this off?

After all the trouble I went through just to put it on... and now I have to take it off, then put it back on again?

My face went pale at the sheer difficulty of that. And with the pressure in my bladder rising fast, there’s no way I could take my time with this.

"Why didn’t you go before getting changed!?"

"Because... I didn’t know..."

I reached for the shoulder straps to pull them down, but between holding it in and my own panic, I couldn’t manage it.

『...No choice. Just go while you're still wearing it.』

Yuna switched to telepathy, making sure no one else could hear.

『I—I can’t...』

I just couldn’t. Wetting myself at this age... no way...

『It’s just a swimsuit. Rinse it off in the shower after and no one’ll know. Come on, the bell’s about to ring—hurry!』

『But... but still...』

『You really can’t hold it anymore, right? It’s just us left in the changing room.』

『Ugh...』

『Hey, Alice... it’s okay, alright?』

With my mind on the verge of shutting down, Yuna’s gentle voice slipped in and melted the last of my resistance.

I... can’t anymore...

I slumped down onto the toilet seat, my body giving out. The dam broke as the last of my self-control gave way.

"Nn...!"

Warmth welled up and spread between my legs, seeping out through the fabric and dripping down. I could feel it wetting my bottom and thighs as it ran down my skin.

"Fu... ahh..."

The bell rang, marking the start of class. Numb with relief and emptiness, I just sat there, listening to the chime in a daze.

『...Alice? Are you done?』

As the trickling of droplets finally began to die down, Yuna spoke to me again through telepathy.

She... heard the whole thing!?

My mind felt like it had hit boiling point, and I swayed on the verge of collapse.

『…It’s okay. There’s no one else here. Just unlock the door.』

My judgment pretty much gone, I did as Yuna said, stood up, and unlocked the stall door.

Yuna stepped in holding a face towel, and without hesitation, began swiftly wiping the soiled parts of my body clean.

"...You’re gonna get the towel dirty."

"Doesn’t matter. Just leave it to me. Here—wrap this towel around your waist and go rinse off."

"But... I need to clean up first—"

I turned around and looked. The urine that had trickled down my thighs had splashed onto the seat and the floor around it.

"I’ll take care of it."

"But… I can’t just let you—"

Letting someone else clean up after my mess...

"If anyone notices we’re gone and comes looking, they might find us. We need to finish before that. So go, now."

Yuna was right, so I wrapped the towel around my waist and headed to the shower room. I turned the water on and let it pour over my head. The cold stream hit my flushed skin, cooling and cleansing me all at once. After a short while, Yuna came in, having finished the cleanup, and stood beside me, getting lightly wet under the shower.

"Whoa—cold!"

"...I’m sorry."

I apologized to Yuna.

"Hmm... it’s fine. I’m your big sister, after all! So don’t worry about it... more importantly, you okay? Want to skip the pool?"

"I’m okay now... I’ll go."

I turned the faucet and shut off the water.

"Alright, let’s go then!"

Yuna took my hand and started walking toward the pool.

"Thanks... Onee-chan..."

…Maybe it’s because of my body, but somehow, little by little, my heart’s changing too.

Before I realized it, I’d already become Yuna’s little sister.