When you entered university, you were prepared for sleepless nights, impossible exams, and a future built on discipline and sacrifice.

You weren't prepared to fall in love.

Lee Minho was your mathematics professor—respected, feared, admired. A man known for his precision, in numbers and in life. He never wasted words, never lingered longer than necessary, and never allowed emotions to cloud his judgment. His lectures were immaculate, his logic flawless, his presence commanding in a way that silenced rooms with ease.

From the very first lecture, you noticed him.

The way his handwriting slanted when he wrote equations. The calm authority in his voice when students struggled. The quiet intensity behind his eyes—focused, distant, guarded. He wasn’t warm, but he wasn’t cruel either. He was controlled.

And somehow, that made him irresistible.

At first, you told yourself it was admiration. Respect. But admiration turned into anticipation—you found yourself looking forward to his lectures more than any other. Sitting closer to the front. Listening more carefully than ever before.

Eventually, you started staying behind after class.

You asked genuine questions at first—clarifications, alternative methods, theoretical curiosities. He always answered patiently, professionally, never once crossing a line. When conversations stretched a little too long, he would step back, fold his hands, and politely end them.

“I’m your professor,” he would remind you, his tone firm but not unkind. “I can’t accept invitations like that.”

You invited him for coffee once. Then again, months later. A campus event. A study conference dinner.

Every time, the answer was the same.

No.

And yet… he never told you to stop coming.

Months passed. Your feelings grew quietly, patiently. You learned his routines. His habits. You learned that he stayed late in his office most nights, that he preferred black tea over coffee, that he hated inefficiency but secretly admired persistence.

You hoped.

Then one day, you got tired.

Not angry. Not bitter.

Just… tired.

You stopped waiting after class. Stopped trying to catch his attention. You began sitting with Seungmin instead—a classmate who was kind, easy to talk to, uncomplicated. You laughed more. You studied together. Your focus shifted naturally, as if you were finally choosing yourself.

Minho noticed immediately.

At first, he told himself it was nothing. That this was good—necessary, even. He should feel relieved.

But relief didn’t tighten his chest when he entered the lecture hall and didn’t see you near the front anymore.

Relief didn’t make his eyes linger when you smiled at someone else.

Relief didn’t burn.

The first time he saw Seungmin lean close to you, something sharp twisted inside him. The second time, he found himself watching you more than the board. The third time, jealousy settled in his chest like a weight he couldn’t ignore.

He didn’t understand it.

He had done everything right. He had rejected you to protect both of you. He had kept his distance, maintained professionalism, buried whatever feelings tried to surface.

So why did it hurt?

That day, his lecture was tense. His explanations clipped. His patience thin. When he turned to write on the board, the chalk cracked beneath his grip.

He turned suddenly, eyes locking onto you for the first time that class.

“Solve this exercise,” he said sharply, pointing at the board. “Now.”

The room fell silent.

You looked up, surprised, meeting his gaze.

His expression was cold. Controlled. Professional.

But beneath it—hidden poorly behind discipline—you saw it.

Jealousy. Frustration. Something dangerously close to regret.

As you walked toward the board, Minho felt something break inside him.

For the first time since meeting you, he realized the truth he had been avoiding for months:

He hadn’t rejected you because he felt nothing. He rejected you because he felt too much.

And now, watching you drift away from him—toward someone else—he wasn't sure numbers, logic, or discipline would ever be enough to fix what he'd done.