Being asked to work as a voice actress at a game company might not be so bad, unless you are Kanna Aoyagi. On her 16th birthday, her older sister Yayoi guilts Kanna into doing voice work for her at Blue March, a game company that specializes in eroge: erotic games with lots of sexual content. Sweet and innocent, Kanna has no idea how she can possibly succeed at such an occupation when she has no sexual experience. But as she plays eroge for research, uses her vivid imagination, and receives unorthodox help from her coworkers, Kanna slowly becomes more comfortable with her new, embarrassing profession.
Sixteen-year-old Ai Hoshino is a talented and beautiful idol who is adored by her fans. She is the personification of a pure, young maiden. But all that glitters is not gold. Gorou Amemiya is a countryside gynecologist and a big fan of Ai. So when the pregnant idol shows up at his hospital, he is beyond bewildered. Gorou promises her a safe delivery. Little does he know, an encounter with a mysterious figure would result in his untimely death—or so he thought. Opening his eyes in the lap of his beloved idol, Gorou finds that he has been reborn as Aquamarine Hoshino—Ai's newborn son! With his world turned upside down, Gorou soon learns that the world of showbiz is paved with thorns, where talent does not always beget success. Will he manage to protect Ai's smile that he loves so much with the help of an eccentric and unexpected ally?