Chitose Karasuma, a young adult striving for excitement, avoids dull tasks at all costs. In a bold move, she invades a voice acting training facility and lands a job at "Number One Produce," her elder brother Gojou's seiyuu agency. Despite her high expectations, Chitose is dismayed to only receive minor roles. As she competes with her peers at the agency, including a cunning airhead and a girl with a Kansai dialect, Chitose realizes that achieving greatness in this fiercely competitive industry entails more than she anticipated.