Having revealed the truth of the Sibyl System to Mika, with her Hue remaining clear, Kasei and Togane, revealed to be an artificially created human, decide to use her for the purpose of turning Akane's Hue black. After eliminating Masuzaki, who knew too much about Kasei's identity, Togane directs Mika to locate Akane's grandmother, Aoi. Meanwhile, Akane and the others learn of an official named Koichi Kuwashima, one of Kamui's childhood friends who escaped the plane accident due to transferring schools shortly before the deadly crash, but suffering intense survivor's guilt as a result...