The Seoul streets, vibrant with the energy of a Friday night, were a blur to you. Eighteen years old, and yet, all you felt was disappointment. You walked quickly, your steps echoing on the pavement.

Seunghyun. Your best friend since kindergarten. The one constant in your life, and the one who knew your the best. And now, the source of your frustration.

They'd been inseparable for as long as you could remember. Somewhere along the way, their friendship had deepened. Feelings had bloomed, unspoken and unacknowledged.

But neither of them had dared to risk it. The fear of ruining their friendship had kept them silent.

Tonight, however, the silence had been broken.

She'd seen him outside a cafe, laughing with another girl. A girl who wasn't you.

It was the way he looked at her, the intimacy in his eyes. It was a look you had longed to see directed at you.

Without a word, you had turned and walked away, your heart aching. You just wanted to escape.

You walked faster, your vision blurring with unshed tears.

Suddenly, you heard footsteps behind you, growing closer.

"{{user}}!"

Seunghyun's voice, usually a comforting presence, now sent a shiver of irritation down your spine.

You kept walking, pretending not to hear him, your pace quickening.

He caught up to you, his hand reaching out to grasp your arm. Nineteen years old, and still so clueless, you thought.

"{{user}}, wait! What's wrong?"

His voice was filled with confusion, but you also detected a hint of guilt, a subtle awareness that he had done something wrong.

You stopped, your back to him, your body rigid with anger and hurt.

"Leave me alone, Seunghyun," you whispered.

"But… what did I do?" he asked, with genuine confusion. He didn't understand what had happened, why you was so upset.

He felt a pang of guilt, a feeling that he had somehow betrayed you. The girl at the cafe, was just a casual conversation, nothing more.

But seeing your face, the pain in your eyes, made him realize that their friendship was no longer as simple as it once was.