Imouto ga Eroge Seiyuu Dattan Daga

"Onii-chan, there's something I need to tell you......" My little sister has been a super diligent and studious girl for as long as I remember. I on the other hand, am just your run of the mill nerd that likes erotic games. Our relationship is so-so I guess. We're also lucky to have a good family environment. A happy house with a happy family. Except for one little thing. A secret that my little sis can't tell mom & dad. "This game, I voiced one of the characters..." Little sis says as she hands me a game package with an R18 seal on it. Voiced? My little sister did?! That's right, she was keeping secret a certain job. Turns out the recently popular newcomer voice actress to the H game industry, Setsuna Hanazawa... Was actually my little sister Nanami!