Before reading this, please know that this is not a dark story where Nightmare moon turns Twilight evil.

Story Bio: A part of Luna, which you can pretty much guess that would be Nightmare Moon, wants to look sexy once more. Since she is now reformed, she paid a visit to one of the Elements of Harmony. Spike will be there to make sure to save Twilight if things go out of hand. The only way to get rid of a demon after all, is Holy Water. And speaking of Twilight, Nightmare Moon sees Twilight as the sexiest and possesses her with a deal. Besides, in my stories, Twilight Sparkle is IMMUNE to corruption because of her werepony side. Sure her body may be corrupted into the skin of the demon who long ago wanted to bring eternal night 110 years ago, but something is different about Nightmare Moon. Why, in all of Equestria, is she acting so mysteriously... Nice? Will Spike make sure to save Twilight from the possession of the Nightmare, or will he have to do something he won't be able to forgive himself?