In 1389 AD, humans, gods, devils, vampires, werewolves, witches, wizards, and mediums signed a great peace contract. Since then, the three realms have been at peace. In the context of peace: the inseparable relationship between the poet Keats and the demon world; a sad history of the werewolf queen; the sweet past of the blood king and queen; the black diamond that the blood princess protected with her life in three realms; Lilith who wanders the world looking for lost children; those counts and dukes devoured by Satan... The people of Dark Satan slowly narrate their stories to you... The goddess of the night, Lilith, opens the door of the inverted cross for you...