It promises more of Darkness in aristocratic trappings, plus a mystery girl who shows up calling her “mama!”
Rather than the regular creators, this one is writtem by Kuma Hiru (author of Reincarnated Into a Vending Machine) and illustrated by Hagure Yuki (who generally does ero work).
This one focuses on Dust, a character who has hardly been in the anime, but who the author has talked up.