Harukanaru Toki no Naka de: Ajisai Yumegatari

Whisked away to the land of Kyou, Akane learns that she is the Ryuujin no Miko, and meets the Hachiyou, her protectors. They must defeat Akuram, a demon who wants to destroy Kyou using the power of Azusa, a woman who has the power to absorb human energy. If Akane and the Hachiyou cannot defeat Akuram and bring peace to Kyou, Azusa'a power will destroy the humans.

(Source: Anime News Network)