In a world where humans are designated as an endangered species by the dominant race of Chimeras, the propagation of mankind is managed by well-intentioned breeding programs. So it is in the case of a certain young human girl, who is raised in luxury and ease so that she may one day serve her role in the conservation of her kind-but when new feelings begin to bloom in the heart of the Chimera boy who works as her caretaker, the stage is set for an incident that will go down in history...