While Taking Care of My Shut-In Little Sister, I Somehow Ended Up Ejaculating Inside a Beautiful Girl - Chapter 79: Just for Fun (3)

Chapter 79: Just for Fun (3)

The arcade’s restroom had a faint smell of cigarette smoke.

“Phew…”

I sat on the closed lid of a Western-style toilet in a stall, taking a quick breather.

It’s well-known that for guys, using a home-style toilet standing up can cause splashes and mess things up. Tiny droplets are invisible, after all.

“…Well, that’s got nothing to do with this.”

I’d already taken care of business and was now fiddling with my phone while seated.

Lingering in a stall might be inconsiderate if the restroom was busy, but it seemed sparsely used, and right now, I was the only one here, so no harm done.

“No messages…”

I was messing around on a certain popular social media app. It might look like I’m one of those “Twitter addicts” obsessed even during a bathroom break, but I’d strongly argue otherwise.

This app has become a rare way to communicate with my sister, Shiori.

Living in the same house, we haven’t seen each other face-to-face in years because of her shut-in lifestyle.

The night before last, for some reason, she snuck into my room without permission and left a framed selfie as a “gift.”

She’s even harder to predict than Yakko-chan.

She suggested we use this social media app, which allows photo sharing, for daily communication.

To understand her intentions and keep an eye on her strange behavior, I agreed to interact via the app.

…From now on, things like shopping errands will probably be handled through it too.

It’s ironic that a tool for connecting with people worldwide is limited to household use, but that’s just how it is. Gotta give props to the app for handling even that.

“What’s gonna happen now…?”

Our last exchange was her goodnight message from the night before last.

I had no clear idea what kind of communication we’d have through this app or what specific interactions would look like. We were severely lacking examples.

With my shut-in sister, we’ve often communicated through notes slipped under her door or occasional messaging apps.

But using a social media app, especially with photo sharing in mind, was completely uncharted territory.

For some reason, Shiori seemed oddly eager to send me provocative selfies, and I had no clue what her intentions or motives were.

“…”

A mix of hope that she might break out of her shut-in life and uncertainty about whether this was a sign of that stirred in me, along with a restless anxiety.

Soon, I heard someone enter the restroom.

They wandered a few steps, and the faint sound of footsteps stopped right outside my stall.

Knock knock knock

“—!”

Whoever it was knocked on my stall door. I was startled, naturally.

Why? Because there were clearly other empty stalls.

No reason to knock on mine specifically.

Knock knock knock

“…”

I tried staying silent (not that it mattered with the door locked), but the knocking continued.

“Someone’s in here.”

“Done with the toilet?”

“That’s Yuu’s voice.”

It was Yuu.

My childhood friend, neighbor, and now girlfriend.

…What’s she want?

Also, this is the men’s restroom.

“I’m coming out soon… but this is the men’s restroom, you know.”

“…? I know.”

“…”

I debated whether to call her out on that.

But the mental effort of aligning our perspectives seemed too much, so I scrapped the idea. Plan B.

“Were you pooping?”

“Nope.”

For some reason, I felt compelled to deny that immediately, driven by a sense of duty.

I don’t know why Yuu asked so directly. To be clear, she’s not tactless.

“You’re done, right? What’re you doing now?”

“Nothing.”

“Nothing, but you’re holed up in a stall?”

“Yeah, just taking a break.”

She’s boldly approaching me in a restroom stall, probing cautiously. What’s she worried about, anticipating, or guarding against? Whatever it is, she probably won’t tell me directly, but I could try narrowing it down. Probing back, though, might just make her unnecessarily anxious.

Whatever she does, she avoids harming me.

As long as I don’t cross her line for cheating, that is.

“…Were you… messing with your phone…?”

“Huh? No, nothing…”

“…”

Her silence told me I couldn’t dodge anymore.

Sweat trickled down my back.

I hadn’t done anything wrong, so why this feeling…?

Maybe it’s Yuu’s ability to exert pressure that makes me feel this way.

“…Hey, open it… open the door…”

“Uh… why?”

“…Can’t show me? What’re you doing?”

“Nothing… but my pants are down, so I can’t open the door.”

I lifted my hips slightly and pulled my pants down.

Just to my knees, but exposing my underwear was enough for now. Insurance in case Yuu does something wild like peeking over the top.

…Probably overkill, though.

“I don’t mind if your pants are down.”

“I mind.”

She’s not oblivious to shame, but when her emotions take over, Yuu sometimes loses sight of normal reasoning or others’ perspectives.

In situations like this, I, the rational one, have to put a stop to her actions.

“Also, a girl hanging out in the men’s restroom is bad news.”

“Then come out quick…?”

“…Fine.”

There’s no option for her to just leave the men’s restroom, huh? Pointing that out would be pointless.

Yuu seemed unusually tense, so I got up, made a show of clinking my belt as I pulled up my pants.

Didn’t forget to flush the toilet.

Whoosh. Wasted water.

“…Ren-chan…?”

“Hm?”

As I stepped out, Yuu was waiting right there, as expected.

But for some reason, she looked at me with a puzzled expression.

“What’s up?”

“…What were you really doing?”

“Really doing? The toilet, obviously.”

“The big one?”

“No way.”

“…”

Yuu glanced at the stall behind me, then back at me, unsure if she was convinced.

By the way, us having this weird exchange in front of a toilet stall must look pretty surreal to outsiders. To avoid traumatizing some random guy and for her sake, we should get out of here.

“Come on, Yuu, let’s go.”

I urged her toward the exit, turning on the sink to wash my hands. I’d already washed them once, so it felt kinda pointless.

“…Ren-chan.”

“Wha—whoa!?”

At first, Yuu tugged my sleeve weakly, but as her long black hair swayed in a breeze, she yanked me forcefully before I could dry my hands.

“Hey, what’s wrong, Yuu?”

“…This way.”

With few words, she led me to—wait, the women’s restroom?

I stopped at the entrance.

Her pulling my sleeve made her stop too.

“I’ve got no business in the women’s restroom.”

“…Ren-chan.”

“What?”

“Now…”

“Now…?”

Yuu paused dramatically, looked up at me expressionlessly, and said in a flat voice:

“Let’s have sex now.”

“…Huh?”

Her actions—no, her emotions—were so incomprehensible I was stunned.

I’d just been thinking how unpredictable Shiori and Yakko-chan are, but I need to amend that.

Sometimes, Yuu is seriously baffling too.

“Come on.”

“No, wait!? This is the women’s restroom—”

“Come on.”

“Listen! Yuu, hold on—”

Still gripping my sleeve, Yuu forcibly dragged me into the women’s restroom—