Here's a couple pics that are semi-related. Apparently (from what I can make out from babelfish) it's from a game about a female knight who ends up semi-possessed by a succubus, so she ends up sharing a body with it (kinda like Grandia 2).
Here's the game for those interested, although I haven't seen the CGs and can't say for certain that the content is relevant to the thread.
http://www.getchu.com/soft.phtml?id=327285
EDIT:
Well, I found the CGs on rapidsearch, and other than the main girl sharing a body with a demon, there's really nothing else relevant in the game.