If you want an anime that induces a nosebleed once every ten minutes, Koe de Oshigoto! maybe that show you're looking for (even if it's only an OVA). Just make sure you're watching either: 1) alone 2) with people with the same tastes or 3) knowing how to mute the show in less than one second. Because believe me, if there are people "around" you who doesn't know what you're watching, you might as well be watching hentai (in their mind, at least).
The story's very straight-forward; Kanna just turned 16 and is asked by her older sister to work as a Voice Actress in her company. Sounds fun, right? I mean, who wouldn't like to voice their own character in an anime or visual novel? Unfortunately, it turns out that her sister's company produces eroge, meaning she'll be an erotic voice actress... And for a virgin (I use the term loosely) like Kanna, hilarity ensures. I found the story fresh and funny, though with some reused elements (common schoolgirl who's life changes once she comes of age; can't be helped).
The art is what you'd expect in a 2010 anime, nothing looked old or outdated. The movement of the characters and the scenes are smooth and crisp, so you can tell the quality of the production value. They also applied censoring in a humorous way, think Seitokai Yakuindomo-style (the mose recent anime with this style that I can remember).
The sole reason why I rated the sound value of this OVA a 10 is because it will induce nosebleeds, trust me on this. Or it may lower blood pressure for some people. The Voice Actresses voicing these Voice Actresses (try saying that 10 times over) delivered what I consider an experience rather than a performance (tell me when I'm exaggerating...). If you're careful, or have a really good ear, you'll also detect a little censoring on some ero-words.
Kanna is/was your typical schoolgirl with her life changed once she turned 16, with a sister that's so composed it's almost a crime. And since it is just a one episode OVA, for now, character introduction and development was kept at a minimum. As far as I can remember only the main lead (Kanna) got any substantial introduction followed by her sister and Fumika (another VA working for the same company). Which, again for a single episode OVA, isn't really a bad thing.