"We make a deal. You tell me your story and I give you a dream. However, after giving the dream to you, I will take some of your memories in return."
On the streets of London, there is a shop called "Fifteen Nights" that sells dreams. The shop owner is a devil named Deya.
The lonely Madam Butterfly, the God of Death who hopes he can make a mistake once, the clown who helps others store their dreams... These are not only fifteen dreams, but also the sighs of fifteen souls deep in their hearts.
(Although she is the original heroine, I think it is more about interpreting the character in Black Butler in my mind from another angle...)