See, this is why the background girls are never attainable in eroge's, cause they're actually one the most complex characters in the game, and it's out of any protagonist's ability to make them fall for him. (Well, aside from Keima, but that's cause he's the capture god.~)
The anime does have this unique charm to it apart from the manga, and it's very reasonably paced. Now if they'd only garuntee a continuation after this season's over. Hopefully it's popularity will be convincing enough. I shall continue to repeat this over and over but this series definitely deserves a multi-season run.~