While being a voice actress at a gaming company may seem like a great opportunity, Kanna Aoyagi faces a different reality. Her older sister, Yayoi, requests her to do voiceover work at Blue March, a company that specializes in sexually explicit games, on her 16th birthday. Kanna, who is pure and innocent, finds it hard to cope with the adult content of the games. As Kanna is not sexually experienced, she doubtfully wonders how she can excel in this job. However, she decides to do some research and spends hours playing erotic games. Along with her vivid imagination, Kanna seeks help from her coworkers in unconventional ways. Gradually, Kanna overcomes her reservations and grows more comfortable in her new and unconventional profession.