This is a world where demons attack humans mercilessly, and a place where the few remnants of humanity are able to resist them. The story tells us about young Leah, who does not remember five years of her past, and about the mysterious Kimi, her new friend, whom the heroine meets in an orphanage. As fate would have it, they are tested for their abilities as demon hunters and end up in a special class at the elite Academy. This story is about them. About their abilities, life and past, and especially about feelings. Are two opposites destined to love each other? What curse is placed on their love? Who are they really?