Following years of unproductive conflict among Gamindustri"s four kingdoms—Planeptune, Lastation, Lowee, and Leanbox—over Share energy, the very power drawn from their citizens" devotion to their goddesses, the four ruling CPUs have finally agreed to a pact of friendship. The accord prohibits any attempt to seize Share energy by force, aiming to usher in harmony and growth across their realms. However, a month after the agreement, Neptune—the CPU Goddess of Planeptune—spends her days idling and gaming instead of fulfilling her duties, causing her realm"s Shares to tumble. Choujigen Game Neptune: The Animation chronicles Neptune and her companions as they strive to boost Shares, confronting an external menace that threatens the very existence of both the Goddesses and Gamindustri.