Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, could be the reincarnation of Sarina Are inclined?ji, among Gorou's individuals who was a admirer of Ai. Four a long time afterwards, Ai is murdered before the twins by precisely the same admirer who killed Gorou. The fan later commits suicide, but Aqua deduces that the murderer can ha