Koe de Oshigoto!

Koe de Oshigoto! is a story about Kanna Aoyagi, a 16 year-old girl who was asked to become an eroge voice actress on her 16th birthday by her 28 year-old sister. She disagreed at first, but after she thought about all of the things her sister did for her when she was growing up, she finally agreed. But being a high school student and knowing nothing about eroge, can she do the job properly?