Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, is the reincarnation of Sarina Have a tendency?ji, one among Gorou's clients who was a lover of Ai. 4 decades afterwards, Ai is murdered before the twins by a similar enthusiast who killed Gorou. The fan afterwards commits suicide, but Aqua deduces which the murderer can have experienc