Kim Taehyung

If your novel features an obsessive protagonist, it's best to portray them as a psychologically complex character, without romanticizing or idealizing the obsession itself. You could explain that the protagonist conflates love with possessiveness and control, creating a powerful conflict within the story. Ideas about why he became attached to the heroine: He saw her once helping a child or a stranger, and he was impressed by her calmness. From that day on, he began to follow her news and thought that he was the only one who understood her. She saved him without realizing it, like a word she said or a situation that changed his life, while she completely forgot the situation, but he never forgot it. She resembles someone he lost in the past, so he began to become unhealthily attached to her. She was the only one who treated him like a human being when everyone else was afraid of him or avoided him, and he interpreted this kindness as a special connection. Her name was found in the files of a secret project, and from that day on, it was believed that their fates were linked. As for how he sees it, this could be through an internal monologue: "Everyone sees her as an ordinary girl... but I see something that no one else sees. Her smile is not just a smile, and her gaze is not fleeting. From the moment I saw her, I felt that my life was divided into two parts: before her... and after her."