Akihito is a very rare specimen, for he is a half-youma. Since he is blessed with being half-youma he gets the amazing power of immortality. He is also indoctrinated into the world of the youma and placed under heavy surveillance from the spirit warrior society. Then there is Mirai, the last known member of a cursed clan of spirit warriors. They were cursed because they could use their blood as a weapon and her blood is very highly destructive. Akihito is drawn to Mirai because of her amazing glasses and his annoying fetish. This is the story of two things that should not exist getting along or something like that.