While Taking Care of My Shut-In Little Sister, I Somehow Ended Up Ejaculating Inside a Beautiful Girl - Chapter 18: If We Crossed That Line, It Felt Like We Couldn’t Stop (3)

Chapter 18: If We Crossed That Line, It Felt Like We Couldn’t Stop (3)

“…! ♥”

Yuu held her breath, watching my hand reach toward her entrance.

Her pubic hair lightly brushed the base of my thumb.

I touched her entire sex with my index and middle fingers, covering it gently.

I felt her clitoris, still hooded, under my palm, taking care not to overstimulate it.

“—Mm! ♥”

The impossibly soft flesh surprised me. The molten heat of her entrance warmed my fingers.

Her slick outer lips and moist inner lips, so demure, closed tightly like a bud before blooming, yielded softly to my touch.

A flood of her arousal soaked my fingers.

The softness, the overwhelming wetness, made it seem like we could make love right now.

But of course, I won’t rush. I can’t risk hurting Yuu’s body by being impatient.

“I’ll be gentle, but tell me if it hurts.”

“O-Okay… ♥”

“Though, since it’s my first time too, I’m not sure how good I’ll be at making it feel nice.”

I started slowly, massaging the surrounding flesh gently, rubbing the surface of her sex as if to loosen it.

“Ah… ♥ Oh… ha… ♥”

Ticklish, Yuu trembled, covering her mouth.

Even with my light touch, her sex felt softer the more I caressed it.

Her outer lips shifted lewdly under my fingers, while her inner lips parted and closed subtly, following along.

Each movement revealed glimpses of pink inside—her vaginal opening, her urethra—or a slow trickle of honey, wetting my fingers, her sex constantly changing.

After a few minutes of caressing, her inner lips stayed slightly parted.

A sign her body was preparing to accept me.

Confirming she was sufficiently relaxed, I moved to the next step.

I slid my fingers slowly into the pink inside her inner lips.

“Mmph~! ♥♥”

Yuu covered her face with both hands, shaking her head.

“Does it hurt?”

“No—mm! ♥ It’s just… weird… feels… strange… ♥♥”

I thought I’d hurt her, but she seemed to be grappling with unfamiliar pleasure.

I was touching the pink inside her inner lips, the so-called vestibular area.

It’s a delicate spot, inside the inner lips but outside the vaginal opening and hymen, near the urethra.

The pain of breaking the hymen varies by person and is usually fleeting, so it’s not a major concern. The real issue is intercourse pain, often from pressure or pulling on the tissues around the hymen, especially in the vestibular area.

This spot is prone to irritation—from underwear, wiping, or the impact of intercourse.

It’s a sensitive area that benefits from being as lubricated as possible, so I checked carefully.

In fact, for intercourse, any part of the sex is better protected when wet, no question.

“Does it hurt here?”

As I caressed her sensitive area, her body trembled repeatedly, her back arching, her thighs trying to close.

Was she climaxing… multiple times? I couldn’t tell yet, but her sweat-drenched body showed how intensely aroused she was.

I made sure she wasn’t mistaking pain for pleasure in her excitement.

“It doesn’t hurt… but… ♥”

“But?”

“~~~! ♥♥”

Yuu shook her head again, her face covered, showing a mix of confusion, arousal, and embarrassment.

“Your… fingers… are too… much—! ♥”

No sooner had she said that—

“—Nnn! ♥ Aahhh! ♥♥”

“Whoa!”

Yuu’s body convulsed wildly, twitching intensely.

I quickly pulled my hand away, watching her closely.

“~~~! ♥♥ …Mm… ah… ahh… ♥”

Her arched back shuddered on the bed, finally settling after a while.

Was that… definitely a climax?

I leaned close to her ear, speaking cautiously.

“Yuu, does it feel good?”

“Nha! ♥♥♥”

“Whoops.”

She arched slightly again, hitting another brief peak.

Her ears are a hot spot too…? Or maybe her whole body is just hypersensitive right now.

“Mm! ♥ Ha… ♥ Ha… ♥ Ha… ♥ Ha… ♥ Ren… chan… ♥”

Removing her hands from her face, she looked at me with a melted, dreamy expression.

“Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan… ♥”

“Yuu…?”

She reached out with both hands. Letting her guide me, her arms wrapped around the back of my neck.

“—Mmph!?”

“—Mchu ♥”

As she pulled me close, she kissed me, and I quickly reciprocated.

I braced my hands on her shoulders, leaning down so she didn’t have to lift her head to kiss.

“—Mm, chu… chup… mha, mm—mchu, mmph, haam… chu… ♥”

Another kiss. We’d lost count of how many today, diving back in.

Still, I kept checking on Yuu, whose rationality was slipping.

I couldn’t let her dry out—though that probably wasn’t an issue—so I reached for her sex again, or rather, just above it.

“—Nnh!? ♥♥”

The upper part of her slit.

Her clitoris.

Earlier, it was hidden under its hood, but now it was fully erect, pushing the hood aside.

It wasn’t large, still slightly covered, which felt oddly cute. I gently touched it with my fingertip.

“—Nnh!? ♥♥ No… ♥♥ Feels… too… good… wait—! ♥”

“Yeah, I’ll go slow.”

I touched but didn’t rub. Clitoral stimulation can be intense, so it’s delicate.

“—No… ♥ Mmm… ♥ Ah… mm! ♥ Mmm… chu… ♥ Chu—ha, mm… mchu… ♥♥”

Our kisses, starting from inexperience today, had become ravenous, breathless, a natural heat we couldn’t stop.

We didn’t care about each other’s breaths, kissing relentlessly, tongues entwined, swapping saliva, violating each other’s membranes.

Yuu seemed addicted to these intense kisses, her reactions growing even stronger as I touched her sex.

“Mmmph!? ♥♥ Mmah! ♥ Aahhhhh! ♥”

While devouring each other’s mouths, I teased her clitoris, and she convulsed wildly, her body shaking dramatically.

Her spasms were so intense I stopped touching her clitoris, waiting for her to calm down. Her eyes, rationality gone, gazed at me dreamily.

“Ren-chan ♥—”

Her cherry lips parted slightly, hot breaths escaping, her voice sweet and needy.

“Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥…”

“Y-Yuu…?”

I hesitated, confused.

Something in her seemed to snap, or maybe she was consumed by feverish heat, calling my name repeatedly.

It wasn’t intentional, not with a clear purpose or need.

It felt like an invitation to her deepest self.

A call to destroy our rationality.

A decadent summons.

“Yuu—”

“Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥ Ren-chan ♥—”

Looking at me with adoration, she moved one hand from my neck to my cheek.

Taking it as a cue, I leaned closer again.

Another kiss. She loves it.

I don’t mind kissing her either.

“—Ha ♥ Lero ♥ —Mmph, ha… mchu… chup ♥ Mm—ha… chu… ♥”

But this kiss felt different somehow.

Due to the angle, my body was beside hers, though my upper body leaned over her at the same angle.

And my lower body, slightly offset—

“…!”

“Ehehe ♥ Ehehehe~ ♥”

With the sloppiest smile, Yuu nudged my thigh with her knee, rubbing her leg against mine, teasing me.

Wondering what she wanted, I noticed her slightly lift her head, so I leaned in for another kiss—

“Thanks for being gentle ♥ I’m totally ready now ♥♥♥”

“—!!”

Her lips brushed past my face, whispering in my ear.

Her sweet, melted voice sent blood and impulse surging through my lower body.

My penis was already painfully hard.

“Yuu… I’m gonna put it in now.”

“Yeah, yeah… ♥♥ Come on, Ren-chan ♥♥♥”

I knelt between her widely spread legs.

Her slit, relaxed lips revealing a hint of pink, oozed honey like a fountain, symbolizing her anticipation.

“Yuu, I’m really… gonna put it in.”

I gripped my penis with one hand, guiding the tip toward her vaginal opening, moving slowly.

My whole body pulsed.

My mind was foggy, unable to think of anything but becoming one with her.

“Come, come! ♥♥♥ Ren-chaaan! ♥♥♥”

Her legs wrapped around my waist.

She tugged at my hips, moving her legs insistently.

(…Huh?)

…Wait, I feel like I’m forgetting something.

But Yuu, maybe mistaking my hesitation for nerves, tightened her legs’ grip.

Our hips drew closer, our sexes nearly touching.

“Come on, hurry, come! ♥♥♥”

Her melted expression, sweet voice.

Her soft yet heated body, her legs’ desperate pull urging me toward intercourse.

Everything was too erotic.

The ultimate temptation, hitting every trigger of my lust and desire.

I couldn’t hold back anymore.

“Yuu—!!”

I felt wanted.

Overwhelmed with excitement, I called her name, pressing my penis against her sex.

“—Mph! ♥♥♥”

“—Ngh!”

Even without penetration, the sensation of our mucous membranes rubbing was an intense pleasure, her moans music to my ears.

Careful not to finish too soon and mindful of the angle, I searched for her entrance between her slightly parted lips as her body twitched.

As my tip slid up and down her slick sex, I found it—her vaginal opening, lower down, hidden by her barely parted lips.

“Ahh! ♥ Oh! ♥ …Ahhh! ♥”

Yuu’s incredible sensitivity made her tremble just from my tip touching her entrance.

She’s so sensitive—will she pass out if we go through with this? I wondered, half-joking, half-worried.

I slowly, carefully pressed my hips forward, preparing to enter—

But then.

“Oh.”

I realized something critical.

Something so important, I couldn’t believe I’d forgotten it until now.

That fleeting unease from earlier.

“Crap, the condom—”

The condom, the pinnacle of human ingenuity for sex—not for procreation, but for pleasure.

An invention designed to prevent pregnancy, allowing us to indulge in pure ecstasy.

I had one in my wallet, in my pants on the chair nearby. Or, if that was too far, there were the ones on the mini-table, provided as hotel amenities.

…But both were out of reach, requiring me to move.

“Yuu, sorry, just wait—”

Wait. I need to get a condom.

But my request had no chance of getting through.

“…♥”

“Huh…? Hey, Yuu…?”

“…♥♥”

I’m not sure if it was silent pressure, but her sloppy, dreamy smile carried an indescribable intensity.

No, really, her face was just beaming with that loose, lovesick grin—

“Yuu. I need to put on a condom, so let go of my waist.”

“…♥♥♥”

I was stunned.

She ignored me.

No reaction to my words.

Her legs, wrapped tightly around my waist, wouldn’t budge.

“Yuu. One more time. I want to put on a condom, so let go of my waist.”

“…♥♥♥”

I was floored.

Complete disregard.

Her smile stayed sloppy, her lips twitching as if holding back a bigger grin.

Her half-lidded eyes, practically glowing with heart-shaped sparkles, showed her rationality was utterly gone.

Yet, despite that, her legs gripped my waist with unyielding strength, impossible to break without serious effort.

Where’s she getting this strength?

Physically, I should have the upper hand, but her legs didn’t budge no matter how I tried.

“Yuu. Listen, having sex without protection carries the risk of pregnancy.”

“…♥♥♥”

I had no choice but to negotiate directly.

This is real sex negotiation… no time for dumb puns.

She might say she’s fine with it.

But I want to protect her.

I don’t want us to walk a path to ruin.

Obviously.

Everyone wants happiness over misery.

“Yuu. Hear me out.”

I brushed her sweat-dampened bangs from her forehead and tried again.

We need to use protection. Sex leads to babies. I pleaded the obvious.

“Look, we’re still high schoolers—”

“Today’s a safe day! ♥♥♥”

“—What?”

“It’s a safe day! ♥♥♥”

“…!?”

For a split second, I wavered. Damn myself for it.

For a moment, I actually felt thrilled at the thought of going raw.

I was ashamed, preaching about protection while my erection showed no sign of calming down.

But my rationality was barely hanging on.

Wait, think calmly, me.

In her current state—completely lost to reason—can I trust her saying it’s a “safe day”?

Is it true?

I don’t know her cycle.

I don’t know if she’s been tracking it or taking precautions.

We didn’t plan for our first time to be raw.

In fact, I brought condoms, so this shouldn’t even be an option.

A small miscalculation.

A potentially fatal mistake.

Somewhere deep down, I might’ve underestimated her feelings, her hidden desires.

“…Is it really a safe day?”

“Yup, totally~! ♥♥♥”

Yuu, still dreamy, purred in a sultry voice.

“So… come on? ♥♥♥ Just go for it! ♥♥♥ Don’t worry if it hurts—it’ll be a memory of our first time! ♥♥♥”

“No, hold on—”

But.

“…Huh?”

“What’s wrong? ♥♥♥ Hurry up and put it in! ♥♥♥ You can finish inside as much as you want! ♥♥♥♥”

“…”

That’s when I saw it.

In the abyss-like depths of her dark eyes, a spark of clarity.

I felt it.

A glimmer of her rationality.

“Yuu…”

“…? What’s up? ♥♥♥ Hurry, hurry~! ♥♥♥”

I looked at her, still whispering sweetly, trying to erode my reason.

Precisely stoking my desire.

As my rationality crumbled under her sexual allure, I clung to what little sense I had left.

If she’s truly lost to reason now…

If her instincts are craving me raw, even my seed in her womb…

Would the rational Yuu allow me to use a condom?

Would the sane Yuu accept our “first time” being through a barrier?

Where does her sanity lie, and where does her overwhelming passion—or madness—reach?

“Yuu. You’re precious to me. I love you.”

“…!? ♥ Y-Yeah! ♥♥ Yeah! ♥♥♥ I love you too, Ren-chan! ♥♥♥”

“So, let me use protection.”

“Ehh~? ♥♥♥ It’s a safe day! ♥♥♥ Our first time! ♥♥♥ Let’s do it raw! ♥♥♥”

Come inside, finish as much as you want—she whispered.

In that impossibly sweet, melted voice.

Tempting me.

“Is it really a safe day?”

“Yup, yup! ♥♥♥ Totally, totally! ♥♥♥”

Of course, she didn’t show me a cycle-tracking app or any proof.

Is today really a safe day in her cycle?

Is there no risk of pregnancy?

I had no way to confirm.

The danger of continuing based solely on her word.

Knowing that, my only option was—

“Hey—! ♥♥♥”

“Yuu!?”

It happened suddenly.

Yuu’s legs, wrapped around my waist, yanked me closer with force.

From a gentle pull to a sudden, powerful tug.

A surprise attack.

“Wait, Yuu—!!”

“♥♥♥~~~~!”

Everything—the scenery, reality—slowed down.

Like slow motion, an unbelievable reality unfolded.

Creak, creak.

My glans, pressed against her pink mucous membranes, forced its way into her tight, shallow passage—no, against her hymen.