Hell's Angel: Orion

Kojiro Orion is a 17-year old high school student living by himself.After having countless dreams about his past, one night while walking home he is confronted by 2 odd girls, Narumi, a white winged angel and Kurenai, black winged demon. They both state they are to be his empress when he "Claims his throne." Freaked out and confused as to what they are saying he ignores them only to realize they have followed him home. He then learns that they are demon and angel and he himself isn't human. He is then told that his destiny is to claim the throne to heaven and hell...