Professor Kim's Special Assignment

"What's going on?" "Why... are you using honorifics?"

When I tilted my head in confusion and asked the question, another question came flying back at me. Only then did I realize I should match the professor's tone.

"Ahem. It's nothing... really. What brings you here, Cha Eunyung?"

At my question, Cha Eunyung fidgeted awkwardly, lowered her head slightly, and answered.

"I came because of what you mentioned last time."

"What was that again?"

"The... personal assignment you talked about."

'Personal assignment?'

I heard the answer, but I couldn't quite grasp the situation. The term didn't ring any bells. While I just stared at her blankly without responding, she spoke again, her cheeks faintly flushed.

"You said that if I let you do anal sex just once... you'd give me an A+ in every class I take from you from now on..."

'...What?'

I froze for a moment before finally understanding what was happening. I also realized what kind of "assignment" needed checking. Afraid she might change her mind, I answered immediately.

"W-Well, of course! If you're willing, Eunyung, I'll definitely keep my promise."

Even though I answered firmly, she showed no reaction for a while. Then she slowly lifted her head and spoke.

"Really... just this once. I only have to do it with my butt this one time, right...?"

"...Huh? Y-Yeah. That's right. Don't worry."

I was momentarily flustered by the word "butt," but I answered as calmly as possible. It seemed Professor Kim Byung-yoon had demanded anal sex from Cha Eunyung. Whether it was his personal fetish or some kind of compromise, I didn't care.

'No... no way!'

I was cheering inside. It felt like a dream. Anal sex with a beautiful mixed-heritage college girl...

"I did what you told me last time."

"What did you do?"

"...An enema."

'Hup!'

I understood what she meant and accidentally sucked in a sharp breath. Right. I vaguely remembered that you were supposed to do an enema before anal sex.

'When... did she do it?'

I couldn't stop the strange curiosity from rising. 'Did she do it in the school bathroom? No, she probably did it at home. She must have cleaned herself out so she could have anal sex. Did she... wipe that place with her fingers...?'

While all sorts of thoughts ran through my head, Cha Eunyung spoke again.

"Are we doing it here?"

'...Here?'

Now that I thought about it, leaving campus sounded like a hassle anyway, and the quest time was limited. This place seemed perfect.

"Someone might see us if we go out together, so this is better. Yeah. Come here and take your clothes off."

"...Okay."

I couldn't hide my pounding heart. She walked past the sofa and came to the right side of the professor's desk where I was sitting. Then she turned her back to me.

"...Could you unzip the back for me?"

With her back to me and her head slightly lowered, Cha Eunyung asked me to unzip her dress. Her beautiful figure was right in front of my eyes. The tight dress showed off her slender body without any exaggeration. If anything, the fact that the dress was still covering her made her look even more beautiful.

Looking at her, I decided there was no need to take the dress all the way off. I stood up and pulled down my pants and underwear. My cock was already hard from the moment she started talking about the personal assignment. Without waiting, I grabbed the hem of her dress and yanked it up to her waist.

"Aah!"

Cha Eunyung, who had been facing away from me, let out a surprised yelp at the sudden action, but she didn't say anything more. I grabbed her waist, turned her toward the desk, and made her bend over. She placed her forearms on the desk and bent at nearly a ninety-degree angle while I held her waist from behind, my back to the window.

Under the raised dress, her pale waist, hips, and beautiful legs were exposed. She was wearing polka-dot panties. They looked somewhat cute, unlike the elegant impression she usually gave off.

'Cuter panties than I expected.'

Cha Eunyung waited with her head lowered in that position. With a racing heart, I pulled her panties down to her pale thighs. Soon, her anus and pussy came into view.

'We agreed on anal sex, but...'

Honestly, with her pussy right in front of me, I wondered if it would be okay to just use that instead. Pretending not to know any better, I tried to push my cock into her pussy. When I thrust my hips forward, I felt her pubic hair brush against my glans. As I pushed a little further, the plump mound and the slit between it touched my tip.

That was when Cha Eunyung's body jerked violently in resistance. With a stiff expression, she said,

"Ah... no!"

"Whoa..."

While I hesitated at the sudden quest notification, Eunyung spoke again.

"You said... only from behind. If not, I'm leaving."

"Ahem. Got it."

'No need to ruin this chance with unnecessary greed.'

I erased any lingering desire for her pussy and decided to stick to what we agreed on—only her back hole.

"Ahem."

After she fidgeted back into position and lowered her head again, I tried to push my cock into her anus. But it was too tight and wouldn't go in. Then I remembered Professor Kim Byung-yoon's lubricant.

'No, this should be even better...'

I immediately reached into my pants pocket—actually the quest inventory—and pulled out the 'Perfect Lubricant' I had received as a reward last time.

'Hmm.'

I squeezed some onto my left hand.

-Squirt.

It felt incredibly slippery when I touched it, yet it didn't run off my hand. The viscosity was impressive.

'It has this really sticky, stretchy feel to it... not bad.'

It reminded me of the first time I used body wash after always using bar soap as a kid. The slipperiness was beyond imagination and clung stubbornly, refusing to disappear.

"Wait a moment."

I began carefully spreading the lubricant over my cock. While I slowly coated myself, Cha Eunyung lay bent over the desk, her snow-white hips and thighs exposed. Once I finished applying it, I pressed the tip against her anus.

-Squelch!

"Ahn!"

The slippery lubricant did its job. Cha Eunyung's anus clenched tightly in surprise at the sudden intrusion, but thanks to the lubricant, my cock slid in smoothly, as if being sucked inside.

I grabbed her slim waist firmly with both hands and began thrusting in and out of her. My left hand, covered in lubricant, gripped her waist, naturally smearing some onto the dress hugging her narrow midsection. The curve of her waist and her pale hips excited me even more.

-Thwack. Thwack. Thwack. Thwack.

-Squelch. Squelch. Squelch. Squelch.

Her ass was ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠elastic. Every time I thrust in, it slapped against my body with a sharp sound. Along with that, the sticky, slippery lubricant made wet squelching noises as it stuck and pulled between my cock and her ass.

The lubricant created an obscene slickness on her hips. The constant "squelch, squelch" sounds weren't exactly pleasant on their own, but combined with the stimulation of thrusting into her anus and the sight of her snow-white skin right in front of me, even those noises started to sound arousing.

-Thwack. Thwack. Thwack. Thwack.

-Squelch. Squelch. Squelch. Squelch.

"Ahn... wait... it feels... strange..."

Cha Eunyung's flustered voice reached me. I knew why. This was clearly her first time having anal sex. From ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠the moment I first pushed in, I could feel her anus instinctively clenching whenever she got flustered. Every time she tightened around me, the lubricant turned her resistance into a pleasurable squeeze. My cock slid in and out of her anus without any resistance, and whenever she clenched, it gripped me deliciously.

Cha Eunyung was clearly flustered by the unexpected slickness and stimulation. Only now did I understand why Professor Kim Byung-yoon had the lubricant.

'But it was already half-empty... has he used it before?'

The more pleasure I felt, the more strength gathered in my hips.

-Jingle. Jingle. Jingle. Jingle.

That was when a familiar sound reached my ears. It came from the bracelet on her wrist. The small bell attached to it rang with each movement, reminding me of the scene earlier when she and her boyfriend had been giggling together.

-Thwack. Thwack. Thwack. Thwack.

-Jingle. Jingle. Jingle. Jingle.

"Hah... haah... haa..."

Now she was moaning with her head lowered, back still facing me. Every time I thrust hard into her anus, the bell on her wrist jingled along with the motion. It sounded completely different from when I'd heard it in the lecture hall.

'So it can make such a nice sound?'

I finally understood why that guy had given it to her. The clear, ringing bell suited her flawless skin perfectly. Using the bell as background music, I moved my hips even more vigorously.

-Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack.

-Jingle. Jingle. ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠Jingle. Jingle. Jingle. Jingle. Jingle. Jingle.

"Ahn... haa... hah..."

Cha Eunyung's moans grew louder. She had started letting out involuntary sounds from the strange sensations of the lubricant and my cock in her anus.

'Good... so good...'

Every time I drove into her, I could see her pale ass jiggling. It was the same ass I'd been secretly staring at in the lecture hall. Looking down at her body from above, I suddenly wanted to see her face too. But from this position, it was impossible.

Then my eyes landed on a small desk mirror sitting on the left side of the professor's desk. I reached out with my left hand, picked it up, and placed it in front of her. But she kept her head lowered, so all I could see was her hair swaying.

-Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack.

-Jingle. Jingle. Jingle. Jingle. Jingle. Jingle. Jingle. Jingle.

"Hah... Eunyung... ha... lift your head..."

"Haah... hah... haa..."

She didn't respond to my words and just kept moaning with her head down. I deliberately grabbed her messy hair with my lubricant-covered left hand and slowly pulled it upward. Gradually, she lifted her head until, at last, her face appeared in the mirror.

-Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack.

-Jingle. Jingle. Jingle. Jingle. Jingle. Jingle. Jingle. Jingle.

"Ahn... ah..."

Snow-white skin, luminous blue eyes, and those pink lips that had smiled at her boyfriend earlier—all of it was visible now. Her lips were slightly parted, letting out endless moans. Her face was flushed red, and her blue eyes looked like they held an entire ocean. Those beautiful eyes met their own reflection in the mirror.

Her gaze stayed fixed on her own face. It seemed like she was seeing her own aroused expression for the first time and couldn't look away. Cha Eunyung was now admiring her own flushed face through the mirror. And while I was also watching her face in the reflection...

Our eyes met.

"Kyaa!"

A startled scream, completely different from her previous moans, burst out. She had just realized that I had been watching her lewd expression. Her blue eyes widened in shock for a moment before she squeezed them shut tightly, clearly embarrassed that her aroused face had been seen. She pressed her lips together, but it didn't last long before they parted again and more moans escaped.

-Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack. Thwack.

-Jingle. Jingle. Jingle. Jingle. Jingle. Jingle. Jingle. Jingle.

"Haa... hah... haa..."

When I lowered my head again, I could see her pale ass jiggling wildly with every thrust. The thought that I was spanking her ass with my hips made me even more excited. Without thinking, I roughly yanked the hand gripping her hair. She winced at the sudden pain and lifted her head, her body twitching in surprise. In that moment, her anus clenched tightly around my cock. The intense squeeze shot straight up my shaft, and I couldn't hold back any longer—I came.

-Spurt.

"Haa... ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠haa... haa..."

I slowly pulled out and stepped back unsteadily. As soon as I did, my semen gushed out of her anus and began running down her pale thighs.

"Huff... huff..."

I caught my breath and sat down on the chair beside me. The cushioned seat welcomed me.

"Hah... hah... Eunyung, your grip is no joke."

"D-Don't say things like that..."

Despite my compliment, Cha Eunyung didn't look particularly pleased. More semen spilled from her anus. It seemed like not everything had come out earlier. She straightened up, grabbed some tissues from the side, and began wiping the cum dripping from her ass. Her face was flushed red, and her hair was messily stuck together from when I'd grabbed it with my lubricant-covered hand. There were also sticky stains on the waist of her dress where I'd held her.

As she wiped the semen from her legs, I could see those beautiful blue eyes again.

"It's over now, right?"

"No, we can't finish this quickly."

"W-What do you mean? You said just once!"

She raised her voice slightly toward me.

"When did I ever say it would end after I came once? Of course it continues until I'm satisfied. Did you really think getting an A+ in all my classes would be that easy? Everyone else studies hard, you know?"

Come to think of it, Professor Kim Byung-yoon was famous for giving out low grades. I'd always wondered how anyone managed to get good marks in his classes... Now I understood. Occasionally I'd seen students who got A+, and they were all pretty girls.

"B-But..."

Cha Eunyung trailed off, unable to finish. It looked like I could keep having sex with her. With a slightly frightened expression, she kept her dress bunched up under her chest to avoid getting semen on it while wiping herself with tissues in one hand.

"Let's have something to drink first."

I took off my pants and underwear completely. With my lower body exposed and my cock hanging out, I walked over to the small refrigerator on the left side of the office entrance and opened it. Inside were vitamin drinks. I grabbed two, came back, and handed one to her.

While I walked around the office with my cock dangling, she stood awkwardly in place, her lower body completely bare and pale. I savored the sight like a hunter admiring prey caught in a trap. I also watched closely as she drank the vitamin drink I gave her, gulping it down. The way she drank while showing off her elegant neckline reminded me of a deer drinking from a spring.

'She's gorgeous... that waistline is killer... her neck is beautiful too... her skin is unreal... and most importantly, I can bend her over and fuck her again whenever I want. That's the best part.'

I gazed at Cha Eunyung's snow-white body with deep satisfaction.