Feb 17 2010 02:11 AM If you guys haven't noticed by now, this anime is targeted at "specific types" of otaku
The "success" (if we can even call it that) of this "anime" is due to it being priced much lower than conventional anime DVD/BD, so it is the perfect "psychological food/snack" for the otaku.
Also, Mai Kadowaki voicing Hinako somewhat helps contribute to the sales as well...as a collection item to her fans, seiyuu-suki and the likes
Otaku can use their power of delusion, imaging that they are "sleeping" with other anime characters which they like, such as lolicon imagining they are "sleeping" with Illya of Fate/Stay Night (who's also voiced by Mai Kadowaki)