Half angels: Individuals cursed because of their impure lineage. Tsukimiya is a Vampire Half Angel, and with her companion-of-convenience Hinata, with whom she shares a strained relationship at best, and an antagonistic one at worst, she is on a search for "God's Book of Prophecy." The book harbors immense power, and is supposedly the only thing capable of removing the half-blood curse that Tsukimiya and Hinata share. <br /><br />The problem is that nobody knows if the book's power is enough to save two people, and neither is willing to share with the other.