In "No One Knew I Was a Famous Singer," the protagonist leads a double life as a high school student and a renowned singer. She keeps her musical identity a secret to avoid the pressures and expectations that come with fame. While navigating school life, she faces challenges like balancing friendships and academic responsibilities.

Despite her success, she often feels isolated and struggles with the fear of being discovered. As the story unfolds, a series of events lead to her secret being revealed, forcing her to confront the truth about her identity. Ultimately, she learns to embrace both parts of herself and finds a supportive community that celebrates her talent, leading to a more fulfilling life where she can be both a student and a star.