Classroom Thrill
Wearing comfortable clothes, I headed to the university lecture hall. It had been a while since I'd attended a college class, so I felt a bit nervous as I opened the door and stepped inside. From somewhere, a familiar male voice called out to me.
“Hey, Kim Hyunjin! Over here!”
I turned toward the voice and saw my college friend—the one who'd synced his schedule with mine—already settled in his seat. Glad to see him after so long, I called his name and took the spot beside him.
“Long time no see, Park Seunghoon.”
“Yeah, it has been. You should come out for soccer during break so I can actually see your face.”
“Sorry, I was busy.”
There was a noticeable gap between his “long time no see” and mine. The friend I hadn't seen in ten years started chattering away, looking much the same as before. While we were talking, a sharp-looking female student walked in sipping coffee. Park Seunghoon leaned in and whispered just loud enough for me to hear.
“Whoa, Kim Eunha still looks as haughty and pretty as ever.”
“Isn't that less 'haughty' and more 'no manners'?”
“Do you know the difference between haughty and no manners? If she's pretty, it's haughty. If she's not, it's no manners. Since she's pretty, it's haughty.”
I wanted to argue, but nothing came to mind. Once Kim Eunha sat down, two more women entered the lecture hall together. Park Seunghoon's eyes immediately went their way.
“Damn, Choi Seunga just keeps getting more charming. Who's that next to her? I heard there's a freshman this year who's as pretty as a celebrity—maybe her? Wait, this is an upperclassman lecture. Is she a returning student or someone who transferred majors?”
The woman beside Choi Seunga met my eyes and gave a small smile, lightly waving her hand. Park Seunghoon looked startled and turned to me.
“Huh? What? You know her?”
“She's my junior, Lee Yujin.”
“That's Lee Yujin? She does look similar, but was she always that pretty?”
Until last year, Lee Yujin had worn plain clothes and kept her bangs down like a curtain over her face. Today, though, she'd taken off her glasses and was wearing a beige skirt and sweater. With her long black hair and neat outfit, she stood out more than any other woman in the lecture hall.
“Wow, that's a serious image change.”
My friend couldn't hide his surprise at Lee Yujin's transformation. Knowing she'd changed her look to catch my eye made me feel oddly proud. Soon the professor arrived and class began. Since it was the first week, attendance was called but not actually checked. After a brief overview of the syllabus, the lecture ended.
Park Seunghoon spoke up as soon as class was over.
“I heard this professor was strict, so I figured he'd check attendance, but he just let it slide. Next class is Human Resource Management—bet that professor won't check either. I'm gonna skip and go play soccer. What about you?”
“I'm heading to the next lecture.”
“Yeah? If you catch anything important, let me know.”
Park Seunghoon left after saying that. On my way to the next classroom, I spotted Lee Yujin standing alone—Choi Seunga was nowhere in sight. I walked over to her.
“Where'd Choi Seunga go?”
“She said she had student council stuff and left.”
“Really? Want to head to class together, then?”
“Yes, senior.”
Lee Yujin nodded with a small smile. As we walked to the next lecture hall, chatting about this and that, I noticed she spoke much more calmly and demurely in person than she did over text, where she tended to be bolder and more playful. Walking beside her, I could feel the stares from the male students around us—mostly directed at her, though a few shot envious glances my way.
We found an empty spot at the very back by the window in the tiered lecture hall and sat down side by side. A pleasant scent drifted from the seat next to me. The Human Resource Management professor entered and began the lecture. He was the relaxed type who didn't care if students dozed off, played on their phones, or did whatever else, as long as they didn't cause trouble. Several students were already slumped over or scrolling, but the professor paid them no mind and simply read through the syllabus.
Lee Yujin, ever the model student, diligently took notes on everything the professor said. I leaned forward, resting my head on the desk like I was going to sleep, when her pale thighs caught my eye. I glanced around—no one was looking this way. The professor's eyes were on the board. My hand drifted down toward her thigh.
“Wait, senior?!”
“Don't want to?”
“It's not that I don't want to, but what if someone sees...”
“It's fine. They won't.”
I slowly stroked her thigh. When my hand touched her smooth skin, her body twitched. Channeling Sex Power into my fingers as I kneaded her thigh, a small moan escaped her lips.
“Hnn...”
Before anyone could hear, I quickly cast Silence. An invisible barrier formed around us, trapping all sound inside.
My hand grew bolder, sliding further up the inside of her thigh. Lee Yujin glanced at me briefly but didn't stop me. Instead, as if giving silent permission, she slowly parted her neatly closed legs.
Does that mean I can go further?
—Isn't this too risky?
Seria's voice echoed in my mind.
It's fine. That professor won't notice as long as we don't make a scene.
I'd originally planned to just tease her thighs, but I changed my mind. My hand traveled up her thigh and between her legs. I felt the black panties I'd seen in the photo earlier. I tugged them down just enough for my fingers to slip inside. Carefully, I rubbed my thumb over her slightly swollen clit.
Even that light touch drew an immediate reaction—her face flushed and her breathing grew ragged.
“Haa, haa...”
Despite the risk of being caught, Lee Yujin didn't tell me to stop. Maybe after living as a model student her whole life, she secretly craved this kind of transgression. The thrill of doing something forbidden in a sacred place of learning only heightened our excitement.
I spread her slick folds with two fingers and slowly pushed my middle finger into her entrance. Her inner walls clenched tightly around it. With each knuckle that disappeared inside her, her pussy twitched. Once my finger was fully buried, Lee Yujin could no longer hold back her moans. She stopped taking notes and covered her mouth with her hand.
“Hnn, mmph, hnn!”
As I began stirring my finger inside her, wet sounds echoed from below. I looked at her face—she was flushed with arousal, hand clamped over her mouth. Not realizing the sound couldn't escape, she eventually buried her face in her arms on the desk like she was sleeping, desperately swallowing her moans.
Squelch— squelch—
Every movement of my finger made more of her juices drip out, producing obscene sounds. I could have pushed her over the edge quickly with stronger thrusts, but I deliberately kept the pace teasing, varying the pressure.
“Hnn!”
She shot me a desperate, pleading look, as if she might come any second. At that exact moment, the professor announced the end of class.
“That concludes today's lecture.”
I turned to Lee Yujin, who was still breathing heavily.
“Want to go to an empty classroom?”
“Yes... senior.”
Having sex in an empty classroom was one of every college student's fantasies. But people usually hesitated because of the risk of being heard. Thanks to the Silence skill, though, I could do it without worry. I led Lee Yujin to a secluded empty classroom in the corner of the building. After confirming no one was around, I locked the door and moved to a spot hidden from outside view.
“What if someone comes in?”
“I locked it. It's fine.”
Even as she voiced her concern, excitement was clear on her face. The thought of doing something she'd never dared imagine before seemed to thrill her. I lifted her onto a desk, removed her skirt and panties. Her pussy, already warmed up from earlier, twitched as if begging to be filled.
Before entering her, I gave her a light kiss and gently stroked her hair. I pulled out my cock and pressed forward into her depths. She was already so wet that I slid in easily.
“Hnn... haaang!”
Once I was fully inside, her body trembled. I began thrusting in earnest, pistoning my hips.
“How's that? Feel good?”
“Y-yes... I was really looking forward to doing this with you today, senior. Hnn!”
She tried to stifle her moans, worried someone might hear. I licked her neck and whispered,
“You don't have to hold back your moans.”
“B-but what if someone hears...”
“It's fine. No one will. Trust me?”
Believing my words, she let the moans she'd been holding back fill the classroom. Thanks to the skill, the sounds stayed trapped inside, so I moved even more vigorously.
“Ahh... s-senior! Haaang!”
Despite her usually demure personality, her moans were surprisingly loud. I smiled in satisfaction at the sight. Leaving kiss marks on her collarbone, we moved as one.
Just as we were approaching climax, we heard the sound of someone trying the door from outside.
—Huh? Why's it locked?
A male student's voice came from the hallway. He tugged at the door, apparently needing something from the classroom. Lee Yujin looked at me in alarm.
“S-senior.”
“Don't worry. I locked it. He can't get in. Want to keep going?”
“What? W-wait... haaang!”
She didn't know the sounds couldn't escape. The fear that someone might hear her moans and come in seemed to make her tighten even more. Lee Yujin desperately covered her mouth with both hands. I grabbed her thighs and thrust deeper. Her inner walls clenched harder, and her juices flowed more freely. I felt my own climax building.
—Ah, damn. Gotta find another empty room.
After a few more tugs, the male student gave up and walked away. The moment the tension left her, Lee Yujin reached her peak in an instant. Her body shuddered violently as her juices overflowed. Still catching her breath, she looked at me.
“Haa, haa... Do you think anyone heard us?”
“I told you. No one will. Just trust me.”
“I'll trust you, senior. Then... we can do it one more time, right?”
The fear of being caught had transformed into a thrilling excitement. Lee Yujin gazed at me with eyes that made it clear once wouldn't be enough. We tangled our bodies together once more.