Imouto de Ikou!

The characters look nice enough and the artstyle is alright. Genitalia are drawn kind of blandly in most angles, but look quite alright in the close-ups at least. Sex scenes are all pretty worthwhile, but they're not very long and there's not many of them.

The story is garbage. It has some pointless melodrama and those scenes are so bad they are laughable. The story's conflict is resolved without the characters even doing anything themselves. It just gets resolved on its own, behind the scenes. And the finale is just stupid after the melodrama.

All in all it's an average hentai anime that's only redeeming quality ... are the ocassional sex scenes itself. I'd score it 6 or even 7 if there was more sex.