Bestfriend's Sister [kim mingyu]

Make him Jealous

Three weeks had passed since Mingyu last saw Sera. At first, when he was avoiding her, he'd still catch glimpses of her around campus—a fleeting silhouette in the crowd, her laughter echoing in the distance. But now, it was as if she had vanished into thin air.

Not once did he see her near the library, the canteen, or even the med department corridors.

Mingyu adjusted his bag on his shoulder, glancing around the campus grounds as he walked to class. The familiar buzz of students chatting and rushing past him felt oddly hollow. He shook his head, trying to push the thought away.

"I guess it's for the best," he muttered under his breath, his words lacking the conviction he wanted them to carry.

"Bro, wanna party after class?" Joo Hyuk leaned over, grinning as he nudged Mingyu.

"Nah, I'm fine," Mingyu replied, shaking his head.

"Come on, man," Joo Hyuk pressed, but before he could push further, the professor entered the room, silencing the chatter. Mingyu turned his attention to the front, zoning in on whatever physics the professor was explaining.

When the bell rang, signaling a break, Joo Hyuk was already on his feet. "Oh, finally a break! Come on, let's roam around the campus."

"It's just 15 minutes," Mingyu argued, opening his book. "What's the point of going out?"

Joo Hyuk rolled his eyes. "I'm not hearing all that." Without waiting for another word, he grabbed Mingyu's arm and dragged him out of the classroom.

"Damn, it's sunny," Joo Hyuk groaned, shielding his eyes as they walked toward the canteen. Once inside, he headed straight for the cashier. "Two iced Americanos, please."

While Joo Hyuk waited, Mingyu wandered near the seating area, his eyes scanning the room. He paused mid-step when he saw her. Sera.

"Oppa?" Her familiar voice rang out, accompanied by a bright smile as she moved in his direction. Mingyu froze, his heart skipping a beat.

But just as quickly, reality hit him. Sera walked past him without a second glance. Mingyu blinked, confused, and turned around to see her approaching someone else—a tall guy standing behind him.

"Oppa, can I borrow your biochemistry notes?" Sera asked the tall guy, her tone warm and friendly.

"Sure," the guy, Sera's senior, Jin Sun Ho, replied with a casual smile. "But, Sera, I'm afraid you won't be able to read my handwriting. How about I help you with them in the library?"

Sera laughed lightly. "That sounds great, thanks!" The two walked out of the canteen together, chatting as they left.

Mingyu was still staring after them when Joo Hyuk returned, handing him an iced Americano. "Woah," Joo Hyuk said, watching the pair disappear through the door. "Looks like the med school god and goddess are finally hitting it off."

"What do you mean?" Mingyu asked, his voice unintentionally sharp.

Joo Hyuk raised an eyebrow. "Do you live under a rock? Jin Sun Ho is the med school's god—smart, handsome, and rich. And Sera? She's the goddess. Pretty, brilliant, and, well, rich. Everyone's been saying they'd make the perfect couple."

He sipped his drink, oblivious to the way Mingyu's grip tightened on his cup. Mingyu said nothing, his eyes lingering on the door where Sera and Jin Sun Ho had just left. 

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"Your handwriting isn't that bad, oppa," Sera said with a small smile as she diligently copied down the notes. Her pen moved swiftly across the page while Sun Ho leaned slightly closer, pointing out key terms and concepts.

Sun Ho chuckled softly, resting his chin in his hand as he watched her work. "Maybe you just have extraordinary deciphering skills," he said, a teasing glint in his eyes. "Most people look at my notes and call them hieroglyphics."

Sera laughed, the sound light and genuine. "Well, I guess I have a knack for cracking your code," she replied, glancing up at him briefly before focusing back on the page.

"Or maybe you're just too kind to admit how terrible my handwriting actually is," Sun Ho quipped with a grin, tapping the edge of the notebook.

Sera shook her head, her lips curving into a soft smile. "No, really. It's not bad at all. And your explanations make everything so much clearer," she said earnestly, her brown eyes meeting his.

For a moment, Sun Ho's teasing demeanor softened. "Glad I can help," he said, his tone warm. "Not everyone would put up with my chicken scratch."

"Well, I'm not just anyone," Sera said with a playful shrug, her confidence shining through as she continued writing.

"How about a selfie?" Sun Ho asked suddenly, pulling out his phone with a playful grin.

Sera looked up from the notebook, a mixture of surprise and amusement on her face. "In the library?" she whispered, stifling a giggle.

Sun Ho leaned in closer, angling the camera to fit both of them in the frame. "Relax," he said with a smirk. "No one's going to say a word to me." Without waiting for her response, he snapped the photo, capturing Sera mid-laugh.

"Sun Ho!" she scolded lightly, though her smile betrayed her amusement.

He examined the picture with a satisfied nod. "Perfect. My followers are going to love this," he said as he began typing a caption.

"You're posting it?" Sera's eyes widened in mild disbelief.

"Of course," he replied, his tone casual as if it were the most natural thing in the world. "Why wouldn't I?"

Sera shook her head, unable to suppress a laugh as she returned to her notes. Moments later, Sun Ho's phone buzzed with likes and comments flooding in, his followers reacting to the unexpected post.

On the screen was the caption: "Study buddies" .