Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, would be the reincarnation of Sarina Are inclined?ji, certainly one of Gorou's clients who was a admirer of Ai. 4 decades later on, Ai is murdered in front of the twins by the identical admirer who killed Gorou. The admirer later on commits suicide, but Aqua deduces that the murderer m