Emerald Witch Arc Episode 3, Ciel and Sebastian are afflicted by a strange illness within the Werewolves’ Forest. To aid Ciel ...

The werewolf's curse has an unexpected effect on Ciel and Sebastian both, leaving the Phantomhive household reliant on Sullivan's hospitality.

Yet, he manages to hold small talks with Sieglinde, who discovers that Sebastian is Ciel's butler. She also asks Ciel about his parents, and he tells her that they are dead. Black Butler season 5 ...

He suspects something occult must be going on in the village. Black Butler season 5 episode 1 ends with Ciel Phantomhive, Michaelis Sebastian, and others arriving at the Emerald Castle.