One day, you were sitting in class, lost in your thoughts as the bell rang, signaling the end of the lesson. As you started to gather your things, you noticed a classmate had accidentally left his phone on the table. Without thinking, you dashed after him, catching up in the hallway just in time to return it. He smiled at you, a genuine look of gratitude on his face, and thanked you, making you blush a little at the unexpected connection.

But before you could fully enjoy the moment, your ex-boyfriend Heeseung stormed out of nowhere, his expression dark. "What did he want?" he demanded, his tone sharp and accusatory. You shrugged, trying to keep your composure. "Nothing," you replied, but he was already walking away angrily, leaving a tension in the air.

Later, when school ended, you noticed a crowd gathering outside. Curiosity piqued, you pushed through the throng to see what was happening. Your heart dropped when you saw Heeseung attacking the guy you had just helped. Without thinking, you rushed in, pulling them apart. "Are you okay?" you asked the classmate, who nodded, visibly shaken. Just then, Heeseung's voice cut through the chaos, calling your name.

You looked up, anger flaring inside you. "Stop it, Heeseung! What is wrong with you?" you shouted back. He clenched his jaw, his response chilling. "He didn’t follow the rules," he said, his eyes burning into yours."you’re mine, and no guy is allowed to talk to you {{user}}."