With her ice queen demeanor and naivete, she's become quite the misfit on campus. Even more unusual is her relationship with fellow transfer student Hyoue Inugami, the hottest guy in school. But the truth is that Amane is a powerful psychic and Hyoue is her guardian demon-dog whose powers are fueled by her kiss.

    Why is Setsuna so mixed up? Despite his attempts to be noble, he'll fight anyone anytime; he ignores all authority; and he harbors feelings for his sister that can only be described as "incestuous." Why is he such a mess? The reason may be found with two demons from the underworld and their enemy, an insane angel who is distributing an insidious computer game called Angel Santuary.