With the era of peace continuing throughout the world of Gamindustri, Neptune, the ruling Console Patron Unit (CPU) and Nepgear, her sister and CPU Candidate of the nation of Planeptune (Sega) resume their lives of laziness despite warnings from their Oracle, Histoire, that the world is entering the ‘CPU Shift Period’ where the public will attempt to discredit and oust their CPUs in favor of newcomers.