Andrew, in the distant future, an old man in some retirement home for Watchers. Or maybe just in his own apartment, but an easy person to find for people with good intentions.
He has a visitor - someone who wants to know about Buffy and Faith and all the others. And Andrew, the eternal storyteller, jumps at the chance. This time, he tries to stick to the strict truth, but may not always manage it. The fic is just him telling his visitor the story.
Sound good to people?