Unbeknownst to him, Aqua's fraternal twin sister, Ruby Hoshino, is definitely the reincarnation of Sarina Are likely?ji, considered one of Gorou's patients who was a admirer of Ai. Four yrs later, Ai is murdered in front of the twins by the exact same fan who killed Gorou. The supporter later on commits suicide, but Aqua deduces the murderer could