"Wake Up, Girls! Shin Shō" serves as a sequel to the original "Wake Up, Girls!" series, continuing the journey of the idol group Wake Up, Girls! as they navigate the challenges of the entertainment industry. The story picks up after the events of the first season and the movie, with the group striving to establish themselves as legitimate idols while facing internal and external pressures. The narrative explores their growth as performers and individuals, emphasizing themes of perseverance, teamwork, and self-discovery.

The series delves into the personal struggles of each member, highlighting their unique personalities and backgrounds. Mayu Shimada, the group's center, grapples with her insecurities and the weight of leadership. Airi Hayashida faces the challenge of balancing her idol career with her academic responsibilities, while Miyu Okamoto struggles with her shyness and lack of confidence. Nanami Hisami, the group's youngest member, continues to mature and find her place within the group. The dynamics between the members are central to the story, showcasing their camaraderie and occasional conflicts as they work toward a common goal.

External challenges also play a significant role in the narrative. The group faces stiff competition from rival idol groups, industry politics, and the ever-present threat of disbandment due to financial difficulties. The series portrays the harsh realities of the idol industry, including the pressure to maintain public image, the demands of rigorous training, and the emotional toll of constant scrutiny. Despite these obstacles, the members of Wake Up, Girls! remain determined to succeed, driven by their passion for performing and their desire to bring joy to their fans.

The plot is structured around key events such as live performances, auditions, and promotional activities, which serve as milestones in the group's journey. These events are interspersed with moments of introspection and character development, providing a balanced narrative that combines action with emotional depth. The series also introduces new characters, including industry professionals and rival idols, who add complexity to the story and influence the group's trajectory.

"Wake Up, Girls! Shin Shō" maintains a focus on the group's artistic growth, showcasing their evolving performances and the creative process behind their music. The series emphasizes the importance of authenticity and staying true to oneself, even in the face of adversity. Through its exploration of the idol industry and the personal journeys of its characters, the series offers a compelling and realistic portrayal of the challenges and rewards of pursuing a dream.