A gal high school student named Leon Kamei has a simple life philosophy: she wants to become everything she could ever dream of being. Her path takes an unexpected turn when the ghost of her late uncle, a former voice actor, suddenly possesses her. This bizarre event forces the two to share Leon’s body and navigate life together. Initially, Leon has no interest in voice acting and no knowledge of the industry, but through her forced interactions with her uncle's ghost, she becomes increasingly fascinated by the craft. The core storyline follows Leon as she decides to aim for a career in voice acting, going from a complete novice to an aspiring professional. The central conflict arises from the huge gap between her flashy gal persona and the demanding, competitive world of voice work, which requires discipline and specific skills she lacks.

The main character is Leon Kamei, a lively and confident gal who is charming but easily distracted. Her uncle, the ghost of a former voice actor, acts as her strict and knowledgeable mentor, though their relationship is filled with humorous bickering due to their clashing personalities. He provides Leon with the technical guidance she needs, while she gives him a second chance to engage with the world of voice acting from a new perspective. The story takes place in modern-day Japan, moving between Leon’s high school, her home, and various voice acting-related locations such as studios and auditions.

The narrative unfolds through several key arcs. The first major arc establishes the premise as Leon and her uncle learn to coexist and communicate. This is followed by a training arc where Leon struggles with the basics of voice modulation, script reading, and emotional expression, often leading to comedic failures. A later arc sees Leon attending her first open auditions for a small role, where she confronts her own inexperience and meets rival characters who are far more trained than she is. The story is driven by these audition challenges, with each new role presenting a unique obstacle that forces Leon to grow both as an actress and as a person. Written by Esaki Kanade, the series focuses on the heartwarming and funny journey of an unlikely duo working toward a single, ambitious dream.