"Boogiepop Phantom" is set one month later and revolves around the consequences of the pillar of light. Echoes' light inadvertently allowed the memories of that night to continue as holograms, giving rise to a mixed reality where past and present co-exist, and forced the evolution of the citizens, including those who were administered the Towa drug by Dr Kisugi. The series is concerned with these evolved individuals, how evolution affected their lives, and their disappearance after meeting Boogiepop Phantom. The Phantom explains it hid them below the city to save them, and that although their bodies no longer function, their nerves extend across the city so they will keep dreaming until the day the rest of humanity catches up to them.