The Invisible Intruder

The once dim and relatively quiet studio apartment of Kang Dahyun was now filled with the sound of flesh slapping against flesh and occasional moans. Suddenly, a lively voice cut through the air.

"Dahyun~ Are you asleep?"

It was the female student who had sat to Kang Dahyun's right in the lecture hall earlier. She had slightly droopy eyes, average height, and a curvaceous figure. Her face wasn't stunningly beautiful, but it had a cute charm. With her droopy eyes always carrying a hint of laughter, she came across as a bit of an airhead.

From what I'd glimpsed in class, she seemed pretty close with Kang Dahyun. Kang Dahyun always used a gentle voice and bright expression when dealing with her friends and boyfriend. Completely the opposite of how she talks to me...

When speaking to me, Kang Dahyun's voice was always laced with irritation, indifference, or anger.

Right now, Kang Dahyun lay on her studio apartment bed, unable to move a single finger. I was on top of her. After just finishing inside her, I was using her body as a cushion while catching my breath. Then an unexpected guest arrived.

The female student who had entered the studio. I recalled the conversation I'd overheard between her and Kang Dahyun in the lecture hall earlier.

-Hmm... this break is kind of awkward... Mind if I come hang out at your place too?

-I'm going to sleep though... Well, you can rest for a bit. Just turn off the TV when you leave.

She must have stepped out briefly and come back. The coffee in her hand was proof—she'd probably gone out to buy it. I also noticed her bag by the sofa, something I hadn't paid attention to before. It seemed she'd left for a short while before I arrived.

In that moment—

"Huh?!"

The female student who had returned with coffee. Checking if Kang Dahyun was asleep, she suddenly locked eyes with me—the unexpected guest watching from above.

Still lying on top of Kang Dahyun, I had been blankly staring at her. The moment our eyes met, I couldn't help but panic.

Sh... shit.

Recognition alteration state. The state where the other person sees me as a ghost. What would she say after seeing me like this?

Kang Dahyun couldn't do anything because she was under the scissors pressure, but this girl might scream and bolt at any second.

Running away would be the best-case scenario.

Looking at Kang Dahyun pinned beneath me, I had no idea what she might do. What would she do to save her friend? Just imagining it already felt like a massive headache.

But her reaction was completely different from what I expected.

"Hehe. I was only gone for a second and you're already asleep."

She walked into the studio with a completely normal expression.

What... what the hell?

Ah...

This notification had appeared among the alerts when I first entered the studio earlier. To this girl's eyes, neither Kang Dahyun nor I looked the way we actually did. All she saw was Kang Dahyun peacefully sleeping on the bed.

That's convenient...

A wave of relief washed over me. Things could have gotten messy otherwise. Below the previous notification was a timer showing the remaining time.

Time flowed relentlessly. Checking the remaining time during a quest always made me feel like ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠I was racing against the clock.

Just then, Kang Dahyun, still pinned beneath me, forced out a strained voice again.

"Su... Sujung... help me... I'm being pressed by scissors... hey..."

So the female student who had just entered was named Sujung. Kang Dahyun was desperately calling for her friend. Her voice came out like a whisper, barely audible.

Of course, Sujung couldn't hear her. Instead, she moved carefully so as not to wake Kang Dahyun. It really seemed like all she saw was her friend sleeping peacefully on the bed.

She sat between the sofa and table, placed her coffee down, and turned on the TV with the remote. When the TV first came on, the volume was louder than expected and filled the room. Sujung quickly lowered it in surprise, glancing nervously at Kang Dahyun on the bed. She was clearly worried the noise might wake her.

Meanwhile, Kang Dahyun continued to strain her voice, begging for help.

"Sujung... help me... please... help me..."

Despite her desperate pleas, Sujung casually sipped her coffee and watched TV. I sneered at Kang Dahyun's futile efforts and covered her mouth with my own.

"Sujung... help... mmph!"

My tongue forced its way between her lips. She couldn't resist at all—probably too weak to bite down hard. My tongue freely explored the inside of her mouth. It felt soft and moist, similar to the inside of her pussy.

At the same time, my hands, which had been hanging limply on either side after I came, began to move. My left arm naturally wrapped around her waist while my right hand slipped between her and the bed to grab one of her ass cheeks. Feeling her body with both hands, I kept moving my tongue without pause.

-Suck... suck... suck... suck...

Through my left arm wrapped around her waist, I could feel how slim it was. Was it natural, or did she work hard to maintain it? Either way, her beautiful figure satisfied me completely. And the ass cheek I was gripping with my right hand—I squeezed and released it repeatedly, massaging the plump flesh that barely fit in one hand.

Kang Dahyun's skin. Her light brown skin was elastic and firm. She desperately wanted to call for her friend's help, but with my mouth covering hers, she couldn't say a word.

"Mmph... mm... mmph..."

My head was tilted about 45 degrees to the side. Our lips were pressed together, and inside, our tongues were tangled. Even though I was forcing my tongue to roam freely in her mouth, she couldn't fight back at all.

"Mmph... mmph... mmph... ha!"

After some time, when I finally pulled my mouth away, a thin strand of saliva connected our lips for a moment. Turning my head to the side, I saw Sujung watching TV, sipping coffee, and scrolling through her phone.

She really can't see me at all.

Feeling relieved by the sight, I pushed myself up. Rising slightly from the bed, I grabbed Kang Dahyun's waist with both hands. Her slim waistline pressed against my palms. A random, pointless thought crossed my mind.

Can all her organs ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠really fit in such a tiny waist? That's amazing.

With all sorts of idle thoughts running through my head, I flipped her over. Until I lifted her waist and turned her, Kang Dahyun's entire body remained limp. The quest said she was under scissors pressure, but to me it felt like her whole body was paralyzed.

Whoa...

Kang Dahyun now lay face-down on the bed. Her back view had a completely different kind of appeal. The beautifully defined erector muscles running down her back. Her slim waist. Her plump ass. And the slight fold of flesh between her ass and thighs—that was what people called "underbutt."

With her legs stretched straight while lying prone, Kang Dahyun's ass clearly displayed that underbutt fold. I looked down at her with an awed expression and ran both hands up her thighs. Now that her mouth was free, Kang Dahyun continued her strained pleas.

"Hnn... sh... shit..."

When she first saw me, she seemed a little scared, but now she looked more angry. Maybe even humiliated. Meanwhile, my hands sliding up her thighs were stopped by the plump mound. The steeply angled part where I couldn't climb any higher—that was the fold between her thigh ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠and ass. Just touching it, I could feel the volume and elasticity of both.

Soon my hands moved past the obstacle and onto her ass. Kang Dahyun's plump ass. The springy, chewy sensation transmitted through both palms.

Ha...

A hot breath escaped my lips on its own. Grabbing both sides of her hips, I lifted them up. Kang Dahyun ended up in a rather ridiculous position—her collarbone to head pressed against the bed, knees on the mattress, ass raised high. From the side, it looked like a light brown slide running from her ass up to the nape of her neck.

Because she had completely relaxed her body, her waist was arched so deeply it looked dangerous. That made her erector muscles stand out even more. The groove running down her light brown back. I could probably roll a small bead along those muscles.

Kang Dahyun's arms hung limply at her sides, and her face was turned toward her friend. I looked down at the position I'd put her in with satisfaction. Even in such an absurd pose, her body tempted me beautifully. Her ass was especially emphasized because it was raised high. I placed both hands on her ass cheeks.

From below came Kang Dahyun's strained whisper.

"Su... Sujung... help me..."

"Stop it. Aren't you tired?"

The one who answered Kang Dahyun's words wasn't her friend, but my mocking voice. I was kneading her ass with both hands. Her beautiful lower body line, her captivating rear view—everything about her ass was alluring.

I often saw her walking outside the lecture hall too. When Kang Dahyun walked in jeans, every step made one ass cheek fold and swallow the fabric. Many male students' eyes followed her seductive rear view. And that ass... was right in front of me now. Held in my hands.

Slowly massaging, I kneaded her ass with both palms. Below it, her legs were neatly gathered as she knelt. I was kneeling too, with Kang Dahyun's calves between my legs.

"Su... Sujung..."

Even after being mocked by me, Kang Dahyun still hadn't given up, continuing to call for help. Meanwhile, my cock had grown rock-hard again, swelling massively like before. And right in front of it was Kang Dahyun's pussy.

The once vibrant pink labia were now covered in thick white semen from when I'd come earlier. Especially while I'd flipped her over and lifted her ass, more cum had spilled out and trickled down her thighs. My cock was also slick with lubricant and semen, completely different from when I'd first taken it out. Just looking at it, there was no resistance to insertion at all.

Hoo...

Letting out a heated breath, I glanced to the side. Sujung was still watching TV. And from below came Kang Dahyun's pitiful voice calling for her friend. Savoring that voice, I thrust my cock back into her pussy.

"Sujung... help... hnn!"

-Squish.