Based on a seinen manga by Konno Azure serialised in Comic Gum.
The story is about Aoyagi Kanna, a 16-year-old girl, who was asked to become an eroge seiyuu (voice actress for erotic games) on her 16th birthday by her 28-year-old sister, Yayoi, at her eroge company. She disagreed at first, but after thinking about all the things her sister did for her she finally agreed. But as a high school student, knowing nothing about eroge, is this actually the right job for her?