My sister Arisu Sakayanagi is a yandere

Afterward, we found a secluded spot to indulge in our lust—the school restroom.

The moment the door locked behind us, Arisu wasted no time.

With a sly smirk, my sister dropped to her knees, her delicate fingers teasing at the waistband of my trousers before tugging them down.

My cock sprang free, already hard, slapping against her soft cheek as she looked up at me with those wide, innocent eyes.

Her pretty, cute face was the perfect contrast to the filthiness of what we were about to do.

Her lips parted slightly, her warm breath ghosting over my length as she spoke in a sultry whisper.

"No matter how many times we do this, I never get tired of it, brother." She murmured, wrapping her petite, soft hand around my shaft and stroking it slowly.

My sister grip gentle but firm. She started slow, stroking me from base to tip, her fingers gliding effortlessly over my skin.

Leaning back against the restroom wall, I let out a pleased groan, completely lost in the sensation.

Her hands worked with practiced devotion, stroking, caressing—worshipping.

"Same for me, sister." I admitted, voice heavy with pleasure. "I never get tired of your service. How about using your mouth instead?"

"Pervert," Arisu teased, rolling her eyes, but she didn't hesitate.

She leaned in, pressing soft, teasing kisses along the tip before tracing her tongue along the underside of my shaft.

The heat of her mouth sent a jolt through me, making my fingers twitch.

I reached out, stroking her silky hair, urging her to go deeper.

"Yes… just like that, Arisu." I murmured.

She wrapped her lips around me, taking me inch by inch, her tongue swirling around my length as she adjusted to the stretch.

It didn't take long for her to pick up the pace, her head bobbing up and down in a slow, sensual rhythm.

The wet heat of her mouth, the way her lips sealed around me so tightly—it was driving me insane.

"Fuck… this is amazing."

She sucked with such intensity, her cheeks hollowing as she took me deeper, her throat tightening around me with every stroke.

The obscene sounds of her sucking filled the restroom, mixing with my ragged breathing.

She was relentless, desperate, sucking me in as if she needed it as much as I did.

I loved every second of it, the wet heat, the eager slurping sounds—it was intoxicating.

"Argh… I'm about to cum."

The pressure coiled deep in my core, and I couldn't hold back.

My grip on her hair tightened, my hips thrusting forward as I buried myself in her throat.

She gagged slightly but didn't pull away, letting me use her mouth without resistance.

The sight of her struggling, tears brimming at the corners of her eyes, only made it hotter.

And then, I let go.

Thick ropes of cum spilled into her mouth, coating her tongue before some of it dribbled down her chin.

When I finally pulled out, her face was a mess, covered in my release, making her look even more erotic.

She swallowed what she could, licking her lips before pouting up at me.

"You're too rough, brother." She huffed, wiping her face with the back of her hand. "That's not how you treat a lady."

Despite her words, the smirk on her face gave her away.

She got up and walked over to the sink, washing away the evidence while I cleaned myself up with some tissues and adjusted my trousers.

Once we were done, she turned back to me, her eyes glinting with mischief.

"Let's get to class, brother, shall we?" she said, offering me her hand.

I grinned, taking it without hesitation. "Yeah, let's go, sister."

With that, we left the restroom and headed toward our destination—Class A.

As much as I desperately craved to bend her over and fuck her senseless until she was screaming my name, I had to remind myself that business must always come before pleasure.

After all, this was the very first day of school, and making a bad impression the moment I stepped through the doors would be downright bad, wouldn't it?

Sinking my cock deep into her tight, wet pussy could wait—there would be plenty of time for that later.

For now, I had a class to attend.

A/N: The result of the vote leaned toward Class A for the majority. I will wait until tomorrow to give a chance to those who haven't voted yet.

So, yeah, in this text, I wrote Class A because the vote leaned toward it, but I will edit the text if the results change.

The second most voted choice was Class D, followed by Class B in third place. Lastly, Class C received only one vote.

As for the writing style, most people here—almost all—preferred the new version, where it was more detailed. I've taken that into account for this new chapter.

What do you think about the sex scene? Was it detailed enough based on your impression?

Most importantly of all, don't forget your fucking stones!