Shiori comes and tells Kakeru and Misuzu everything about the Red Night and about the Black Knights, revealing herself to be a young magician and librarian of a secret magical organization called the Index. In her explanation, she shows several key facts, starting with the girl in the crystal, Lisette. Lisette is actually the mirror image of a wicked witch named Liselotte, who seeks to destroy the world to fulfill her lover, a man named Verard's, dying wish. 64 years prior, Liselotte was sealed away by Index using a forbidden spell. However, by doing so, the various members that accomplished it turned into hideous creatures who are now called the Black Knights, who guard Liselotte's seal...