Sebastian temporarily takes on the role of Sullivan's butler to ensure Ciel's recovery. He introduces her to etiquette and English while structuring her daily routine – from morning tea to adapting her clothing to Western fashion. Sullivan shows curious interest in the outside world, but Wolfram remains distrustful.

Meanwhile, Ciel struggles with the effects of the curse: His temporary blindness and psychological trauma only allow him to get close to Finnian, who comforts him and reminds him of their shared past – Ciel once rescued Finnian from a laboratory where he was abused as experiment "S-012."

Sullivan discovers the demonic markings on Ciel's eye and Sebastian's hand. She confronts Sebastian, who hints that Ciel was once the victim of a failed demon summoning ritual. Sullivan promises to keep the secret but emphasizes the dangers of such practices.

While the servants prepare a nutritious feast for Ciel's recovery, Sebastian uses the opportunity to explore the castle. He discovers a hidden room behind a wall, hinting at unresolved secrets. At the same time, it is suggested that the forest's miasma and the "werewolf" attacks are more deeply connected to the history of the Emerald Witch.