Shirogane dies <-- No, He is not dead, is only back in the Shadow World;; After finding out that Haruka is actually Ushi-sama, they followed him into Mt. Fuji. Aya and Kengo separate with Akira and Shirogane respectively to deal with any blockages. That doesn't exclude Shirogane himself after an attack from the possessed butler. When Akira found Haruka, he told him everything causing the King of Darkness himself to appear, capturing Haruka. Shirogane came to the rescue but in the end it was Akira who, turned into his Rei form last minute, saved Haruka who cried to be with his nakama...