What I remember of this fic is a little confusing because I just remember parts of it here and there, but anyway, it's a Post-Chosen fic (maybe Post-NFA) and Spike is feral and I remember this one scene where Spike is holding Buffy and Giles offers to take her to her room and Spike just growls at him and takes her to the basement with him. And I remember an apocalypse that might have Drusilla involved in it.

Happy hunting!

I've already been through all the Feral-Spike recs. But I'll be sure to look over them again. I could have missed it. Thanks!