High school student Chae Seo-hyun, who was living a life filled with helplessness, is moved by the performance of singer Yoon Ji-soo and regains the meaning of song. The two reunite in college, and after much inner conflict, Chae Seo-hyun admits that she likes Yoon Ji-soo...! This is the story of a yandere rookie singer, Chae Seo-hyun, who seduces the leading musical actor, Yoon Ji-soo, becoming a successful fan.