Got another find from ExHentai, looks like a kitsune who has sex with a human and then mysteriously age regresses. I'm thinking maybe she absorbed to much energy or something?
She does get pretty young, so if your squeamish, go ahead and avoid.
If anyone else has an explanation for her regression, let me know below.
http://www.mediafire.com/download/p1...cchatteruu.zip
So quick edit to this, I was able to translate part of this to figure out what happened. Apparently her power is sucked out of her because of a barrier that was put on the room by the young man.