Black Descent

As a child of brightness, Elaine Kamado seemed to bear good fortune. However, when an ancient evil threatens the world, Elaine must fulfill her duty as member of the Demon Slayer Corp and slay it. It seems easy, or so she thinks, especially when a demon sends her back 132 years in time and meets her ancestor: Ciel Phantomhive! Can Ciel help his descendent get back to her own time?