unlike previous "hyperdimension neptunia" games, "gekishin black heart" is not set within the world of , but instead within a similar but separate world known as . the goddesses of each of the four nations battle against one another for hegemony over the world day by day, however just as noire is one step away from complete domination, the goddesses' powers are robbed by an unknown force. in order to save the world from destruction, the four goddesses cooperate with one another with the aim of unifying gamarket.