Postdiluvian: The Ancient Chronicle:

Long before the destruction of the antediluvian world, a band of humans fled Earth to live among the stars. They are the Nanyanin, and now, thousands of years after the ancient deluge, their descendants are spread throughout the galaxy. Yet Earth remains solely the domain of the Thalanin, the children of those saved from death in the flooding of the world. Though ignorant of their stellar kindred, they are watched over by the Itarlavon, a Nanyan family tasked with guarding the Earth and its...