Miaka, now 18, and Taka have become happily married, and are now expecting their first child. At last, it seems they can live a peaceful life. However, fate will once again test Miaka and Taka, as Mayo Sakaki, a high school girl infatuated with Taka, decides to force her own "happy ending" when none other than the Book of the Universe of the Four Gods falls into her hands. Entering the world as the new Priestess of Suzaku, Mayo rejects the real world - but after Miaka falls into a coma, Taka must now once again enter the world of the Book to get Mayo back.