Thirteen years after Raio Nishijima vanished from Kyoto, his former seventeen-year-old mentee Anna Kawashima has rebuilt her life as the geiko Kikutae in Miyagawachō. When her crystal orb violently reacts, Raio is rescued from a Yokohama compound where he was held captive and subjected to horrifying experiments. His return forces Kikutae to confront what happened to him, and why the orb is responding.