The Girlfriend's Best Friend's Temptation

The phone rang in the dead of night.

On the screen, the name Seonyeong glowed.

"Hello?"

"Yeonwoo oppa? It's Seonyeong. Hye-na... she's really drunk. Could you come pick her up?"

Yeonwoo sat up immediately.

"Where are you? I'm on my way."

Seonyeong gave him the address. He hung up, threw on clothes, and left the apartment.

At the bar, he found Hye-na sprawled across the table, Seonyeong watching her with worried eyes. Empty soju bottles lay scattered everywhere.

"Hye-na."

Yeonwoo approached and gently shook her shoulder.

She turned her head toward him.

"...Oppa...?"

Her eyes focused for a moment, then blurred again.

"What happened to her? How much did she drink?"

Seonyeong sighed and began explaining in a low voice.

"Today... an anonymous post appeared on the school bulletin board. Titled 'Inappropriate Relationship Between Art Professor Yeon Jeong-ho and Student Kang Hye-na, and Allegations of Favoritism'..."

"What?"

Yeonwoo's gaze sharpened.

"The content..."

Seonyeong hesitated before continuing.

"It claimed Hye-na used her inappropriate relationship with the professor to monopolize scholarships, was unfairly selected for a highly competitive overseas study program, and even received good grades through improper means..."

Glancing at Hye-na, Seonyeong continued.

"Hye-na... she was really upset after seeing that post. She didn't say anything, just left and started drinking. I tried to stop her, but she wouldn't listen."

Yeonwoo stared at Hye-na, lips pressed tight.

Her status window appeared.

Negative? Can the value actually go that low?

Damn...

According to the system's explanation, this wasn't just drunkenness. The number revealed how deep a hole she'd fallen into.

Yeonwoo couldn't tear his eyes away from Hye-na. Her slumped shoulders, hair falling messily, fingertips trembling without consciousness.

"Who posted that?" he asked.

"I don't know," Seonyeong shook her head. "It's anonymous. But... they knew the details very precisely. Scholarship names, the timing of the overseas program..."

She stopped.

"I see. Thank you, Seonyeong. Let's take Hye-na to my place. Can you help me?"

Yeonwoo lifted Hye-na's body. She leaned weakly against him, her body limp and heavy.

"Okay."

He supported her as they left the bar. After getting out of the taxi, Yeonwoo and Seonyeong struggled to carry Hye-na up to his studio apartment.

Once inside, Yeonwoo laid Hye-na on the bed, covered her with a blanket, and removed her shoes. She remained unconscious.

Seonyeong collapsed onto the sofa, panting.

"Haa... she's so heavy, Hye-na..."

"Thanks for your help."

Yeonwoo poured her a glass of water and set it down. Sitting on the sofa beside her, he naturally checked her status window.

Huh? 38?

Yeonwoo was surprised by the number. Seonyeong, whom he often encountered during dates with Hye-na. Each time, he'd gently raised her emotion value between 30 and 40 to soften the atmosphere and eliminate unnecessary barriers, keeping her in a favorable disposition toward him.

But now...

He hadn't done anything. No intentional intervention, no manipulation.

And yet the value remained near 40.

Could... Seonyeong also like me?

The thought flickered through his mind.

"It's good you're here, oppa."

Seonyeong took a sip of water. Her gaze drifted to Hye-na on the bed. She sighed with sympathy.

"Hye-na... she must be going through so much. With that post on the school board... how will she face school life from now on?"

"We'll see."

Yeonwoo answered briefly.

"But, oppa..."

Seonyeong's voice shifted slightly. She wasn't looking at Yeonwoo, still staring at Hye-na.

"If... if that post were true... what would you do?"

"Huh? If it were true? Do you... know something?"

"No... I'm just asking hypothetically."

Yeonwoo listened silently.

"Actually, Hye-na... she gets a lot of jealousy. She's pretty, talented, has scholarships and overseas opportunities... more than others..."

"Someone blinded by jealousy probably posted that... but just in case... if it were true... I wondered how you'd feel."

Seonyeong turned to look at Yeonwoo. Her eyes were complicated.

"You only see Hye-na in such a good light, oppa."

Her eyes glistened as she looked at him.

"Why... do you only look at Hye-na?"

"Huh? What do you mean?"

"It's just... you're so foolish."

Yeonwoo stared at her.

"Seonyeong."

The moment he said her name—

Seonyeong suddenly leaned forward.

Short distance. No time to dodge—

Her lips touched his.

Yeonwoo jerked back in surprise. His hand instinctively pushed Seonyeong's shoulder away.

"What are you doing, Seonyeong?!"

His voice rose, mixed with shock and confusion.

Seonyeong stumbled back, barely steadying herself. Her eyes were already wet, breath trembling.

"Oppa..."

Her voice shook.

"I... I think I like you."

"Wh-what are you talking about?"

"Really... I tried so hard to sort it out alone, to hold back... because you're Hye-na's boyfriend..."

Seonyeong swallowed before continuing.

"But..."

A tear fell to the floor.

"When I'm with you... I keep falling apart."

Seonyeong lowered her head.

"Everything... falls apart."

Another tear dropped from her eyes. Then she moved forward again.

This time more desperately, wet lips seeking ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠his mouth.

This time, Yeonwoo...

didn't pull away.

As her lips touched him again, countless thoughts raced through Yeonwoo's mind.

Is this a side effect?

Or... did I use this system too casually?

The value he'd manipulated carelessly, for convenience, without thinking. He'd assumed it was just a tool to create a "good atmosphere."

But emotions are like water—once they start flowing, they lose direction and carve their own path.

Because of that value I raised without thinking... Seonyeong has somehow come to like me.

He'd misused the system, turning Seonyeong into a woman clinging to him in tears.

But for now, he decided not to think about it.

The feel of her breasts in his hands stopped Yeonwoo from thinking at all.

Yeonwoo accepted her kiss, one hand gently wrapping around her back.

He didn't dislike this situation. A woman throwing herself at him, saying she liked him. There was no falsehood in her eyes.

Even if it was created by the system's misuse, her emotions in this moment were real.

Unrequited love—the purest, most fiery emotion a young woman could feel.

Moreover, Seonyeong was a completely different type from Hye-na. Confident, self-assured...

Sexy.

It would be hard to reject such a woman...

Yeonwoo was still young. Or rather, how much would he need to grow to reject such an aggressive advance?

Yeonwoo...

accepted Seonyeong.

His lips began to move. His tongue slipped between her lips, seeking hers. Their kiss grew deeper, more intense.

One hand stroked up and down her back, the other cradled her head, pressing her closer.

Encouraged by his response, Seonyeong became even more active, as if a forbidden seal had been broken. She clung to Yeonwoo, kissing him desperately.

"Oppa... I... I like you so much."

Yeonwoo held her and laid her back on the sofa. Their bodies overlapped, breasts pressing against each other, legs tangling naturally. They stuck together without a single gap.

Their lips continued sucking each other's, hands exploring each other's bodies.

Now their hands began removing each other's clothes.

Yeonwoo pulled Seonyeong's t-shirt up in one motion. The thin fabric slipped away, revealing her plump breasts wrapped in a white bra. The bra straps dug slightly into her shoulders, pushing flesh upward, making it even more lewd.

Yeonwoo caressed her breasts over the soft bra more densely than before.

Seonyeong didn't hold back, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠unbuttoning Yeonwoo's shirt one by one. Her palm slid down his bare skin after removing the shirt, then covered the firm bulge above his pants.

"Haaah... oppa... I... feel so strange. Ahhh..."

Seonyeong moaned, rubbing harder. The heat and twitching she felt through the pants zipper made her breath even more ragged.

"Seonyeong... what are you doing..."

"I don't know. I don't know what to do either."

Yeonwoo couldn't hold back either.

Fuck... am I really trash? My girlfriend is collapsed from being upset, and...

‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠

But his gaze was already fixed on Seonyeong's deep cleavage. Every time flesh swayed between her breasts, his mind went blank.

I want to take it off. Tear this thin fabric... bite and suck those breasts hidden inside.

He looked into Seonyeong's eyes again. Her large eyes were wet, looking up at him like a puppy desperate to be held.

Refusal? That was already impossible.

Yeonwoo reached back, feeling for the bra hook. Finding the small ring, he snapped it open in one motion. The elastic straps snapped! as the bra loosened.

He slowly, very slowly, lifted the bra up.

Pop.

Her full breasts sprang free, protruding. The rounded shape was artistic, nipples already flushed red and standing erect.

Seonyeong's breath caught. Her face turned bright red with shame, but as she felt Yeonwoo's gaze hotly licking over her breasts, her lower body grew wetter.

She gathered her courage, took Yeonwoo's hand, and placed it on one breast.

"Touch me, oppa... I... how pretty my body is..."

Yeonwoo's fingers slowly brushed the nipple. Pinching slightly, a sweet moan burst from Seonyeong's lips.

"Haaah...! Oppa... there...!"

"Y-yeah... really pretty. Fuck, so pretty it's driving me crazy."

His hand gripped her entire breast. Soft flesh bulged between his fingers. Rubbing the nipple hard with his thumb, Seonyeong's thighs trembled.

"More... touch me more. I'm prettier than Hye-na..."

"Yeah... I'm touching you. Really... pretty. Your body... damn beautiful, Seonyeong."

Yeonwoo whispered in her ear. He wrapped his entire palm around her breast. The right elasticity and soft skin texture transmitted to his hand. He squeezed and released gently, marveling at how the shape changed.

"Ah... oppa..."

Seonyeong buried her face in his shoulder, moaning.

Yeonwoo lightly twisted the nipple in circles, pinching slightly. Each touch made Seonyeong's body jerk, her breathing growing rougher.

"I... I'm happy. Because oppa is touching me like this..."

Seonyeong lowered her head.

"I know you only look at Hye-na... but I thought someday... you'd look at me too."

"We... we shouldn't be doing this, right?"

"Why not? Hye-na is..."

"Hye-na is what?"

Seonyeong nearly made a slip of the tongue, quickly closing her mouth. She'd almost mentioned Professor Yeon.

"No... idiot."

"I didn't know. That you liked me..."

"I know. I didn't know either."

Yeonwoo lifted her chin, lightly kissing her lips. Then his mouth moved to one of her breasts.

He brushed the nipple with his lips...

tickled it with his tongue.

"Hhh~ oppa..."

A thin moan flowed from Seonyeong's lips. It stimulated Yeonwoo further.

Her nipple entered Yeonwoo's mouth, that hardened little protrusion. He gently sucked it with his lips, tongue delicately licking the firm bud. Sometimes lightly, sometimes biting hard.

"Aah...! There... oppa... so... so good..."

Seonyeong threw her head back, spilling moans. Her hand gripped his hair, unconsciously pushing her breast deeper into his mouth.

"Oppa... show me too... I want... to know your body..."

Her hands explored his body. Their bare skin touched.

Then—

"Huh... hmm..."

From the nearby bed, Hye-na moaned in her sleep, tossing her body.

Their movements paused at the sound. They turned to look at the bed.

Hye-na was still deep in sleep.

In that moment—

Seonyeong's ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠eyes flickered slightly. Guilt.

Yeonwoo felt it in her expression too.

"Should we... stop?"

Guilt flashed in Seonyeong's eyes, but she soon pulled Yeonwoo's head closer.

"No... I don't want to. Don't worry... just look at me now. Hye-na... is sleeping, right?"

Seonyeong met Yeonwoo's eyes.

"Do you... want to stop, oppa?"

"Shouldn't we...?"

"You're wrong. You made me like this..."

"Really... are you okay?"

Seonyeong nodded clearly.

"I want... to do it with you."

She unbuttoned Yeonwoo's pants and lowered the zipper. Yeonwoo grabbed the waistband of her short skirt, pulling it down slightly.

The skirt slid down her smooth thighs, falling to the floor.