In "I Became the Most Popular Girl at School Overnight," the protagonist experiences a sudden and dramatic shift in her social status. After an unexpected event or transformation—like a makeover, a standout performance, or a viral moment—she goes from being relatively unknown to the center of attention. The story delves into her new experiences with popularity, including the challenges of maintaining her image, the dynamics of friendships, and the pressure to fit in. As she navigates her newfound status, she learns important lessons about authenticity, true friendship, and the fleeting nature of popularity.