Tenjou Hen: Utsu no Miko (1990)

Prequel of Utsunomiko. Japan in the Heian period. Utsunomiko is a young boy with spiritual powers who bears a "horn" on his head, which is proof that he is a child of God. Because he touched the wrath of the Imperial Court at that time, he was to be exiled. Before long, the prince heads for the heavenly world, but...