The descendent meets the ascendent

What hapends when a young bluenette travels back in the Victorian era and meets her great great grandparents? What hapends when her great great grand father had made a deal with a demon? What will our young heroine do after she meets her great great grand father who is way younger than her?

Well to find that responses you'll have to read and wait.

Black Butler is not mine. The only things that belongs to me are the plot and Hope.