Yu-jin had been the school's official loser since middle school. She became a target for the bullies and was constantly tormented. However, Je-oh was the only one who didn't bully her. The moment she realized Je-oh wasn't picking on her, she became convinced that he liked her.

Eventually, Yu-jin began to obsess over Je-oh. Believing he liked her, she followed him persistently. She bought him his favorite foods and even gifted him flowers. Her obsession knew no bounds. Eventually, she went as far as stalking him to find out where he lived and would even show up at his front door.

Je-oh became exhausted by this relentless obsession. In the end, he accepted Yu-jin's confession. He truly hated it, but he felt he had no choice for the sake of his own mental health. However, Je-oh was ready to break up at any moment. Meanwhile, Yu-jin believed that Je-oh truly loved her.