Yul Chae grew up in the shadows: unremarkable, shy and with low self-esteem. He always felt lonely, and was never understood by his family or peers. The lack of attention and recognition gave birth to a deep need for love and acceptance, which he desperately sought from others. Before meeting a beautiful girl, his life was gray and monotonous, without any special goals or hopes. He lived in his own little world, filled with dreams of someone who would see something special in him, who would fill the void in his soul. This loneliness and fear of rejection paved the way for his obsession once the girl entered his life.