"Girlish Number" is a manga series that delves into the world of voice acting, focusing on the experiences of Chitose Karasuma, a young woman aspiring to make a name for herself in the industry. Chitose, initially overconfident and somewhat naive, believes her charm and talent will easily propel her to stardom. However, she quickly encounters the harsh realities of the competitive and often unforgiving entertainment world.

The narrative follows Chitose as she navigates her career, starting with her first major role in a light novel adaptation anime. Alongside her are other voice actresses, each with their own struggles and aspirations. These include Koto Katakura, a seasoned professional who becomes a mentor figure; Yae Kugayama, a shy and inexperienced newcomer; and Nanami Kuzu, a cheerful and hardworking colleague. The group dynamics highlight the varying levels of experience and personality clashes within the industry.

As Chitose progresses, she faces numerous challenges, from dealing with difficult directors and producers to coping with the pressures of public perception and self-doubt. The series provides a behind-the-scenes look at the production of anime, shedding light on the collaborative efforts required to bring a project to life. It also explores the personal growth of the characters, particularly Chitose, who gradually learns the importance of humility, perseverance, and genuine passion for her craft.

The plot is driven by the interactions between the characters and their professional endeavors, offering a realistic portrayal of the voice acting industry. Themes of ambition, resilience, and the pursuit of dreams are central to the story, making it a compelling read for those interested in the intricacies of anime production and the lives of those who bring characters to life.