"Ura Girls!" is a manga series that centers around the lives of high school girls who are part of an underground idol group. The story is set in a small, struggling town where the local economy is in decline, and the school's cultural festival is at risk of being canceled due to lack of funds. In an effort to save the festival, a group of girls decides to form an idol group to raise money and attract attention to their school. However, unlike typical idol groups, these girls lack the polished image and professional training often associated with the industry. Instead, they are ordinary students with no prior experience in performing or entertainment.

The main characters include a diverse group of girls, each with distinct personalities and backgrounds. The protagonist, often seen as the driving force behind the group, is a determined and resourceful girl who takes the initiative to organize the idol activities. Other members include a shy and reserved girl who struggles with self-confidence, a tomboyish athlete who initially dismisses the idea of being an idol, and a quirky, eccentric girl who brings humor and unpredictability to the group. Together, they navigate the challenges of balancing school life, personal insecurities, and the demands of performing as idols.

The narrative explores their journey as they learn to work together, overcome obstacles, and gradually improve their skills. The girls face setbacks, such as poor initial performances, lack of audience interest, and internal conflicts, but their perseverance and growing camaraderie help them push forward. The story also delves into their individual struggles, such as dealing with societal expectations, family pressures, and personal dreams, adding depth to their characters.

As the group gains traction, they attract the attention of both supporters and critics, leading to moments of triumph and self-discovery. The series highlights the themes of friendship, determination, and the importance of pursuing one's passions, even in the face of adversity. Through their efforts, the girls not only aim to save the cultural festival but also find a sense of purpose and belonging in their shared endeavor. The manga balances lighthearted humor with heartfelt moments, creating a relatable and engaging portrayal of teenage life and the pursuit of dreams.