Kannazuki no Miko

Himeko is shy and fond of Chikane, a striking and composed student at their private boarding school. Both were preparing to celebrate their sixteenth birthdays together when a shrine suddenly appears in the sky and giant robots attack the school. Himeko learns she is the reborn Solar Priestess, and Chikane is revealed to be the reborn Lunar Priestess. As more hidden truths emerge, it becomes evident that their lives are about to change dramatically.