Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, may be the reincarnation of Sarina Are inclined?ji, one of Gorou's individuals who was a supporter of Ai. 4 decades later, Ai is murdered before the twins by the identical enthusiast who killed Gorou. The supporter later commits suicide, but Aqua deduces the murderer may have had his a