After years of fruitless war between the four realms of Gamindustri (Planeptune, Lastation, Lowee and Leanbox) over Share energy, the source of their strength based on how much their people have faith in their goddesses, the four CPUs that rule over them have finally signed a friendship treaty. The treaty bans any attempt at claiming Share energy through military force, in hopes of bringing peace and prosperity to their worlds. Yet, a month after the treaty, Neptune, the CPU Goddess of Planeptune, spends her time goofing off and playing games rather than doing her job, leaving her land's Shares plummeting. Choujigen Game Neptune The Animation follows Neptune and her friends' attempts at raising Shares, while dealing with an external threat that could spell the end of both the Goddesses and Gamindustri itself...

In the year of 20XX, a young boy by the name of Netto Hikari receives a very special gift as he enters the 5th grade. His very own customized net navi, Rockman! Despite Rockman's small size and far more responsible personality, the two boys quickly become the best of friends. A net navi is designed to guide his operator from the inside of his or her PErsonal Terminal, or simply PET for short. Children and adults alike enjoy friendly "Net Battles", where they spar their navis against each other to prove their worth.

After wandering through the desert for days, a bitter warrior named Munsu is lost and unable to continue. His life is unexpectedly saved by Mon-ryon, a young man who dreams of becoming a secret agent for Jushin, a once-great country that was recently destroyed. Mon-ryon's goal is to save his girlfriend, Chunhyan, a born fighter who is held captive by the evil Lord Byonand. Then, from out of nowhere, blood begins trickling from his chest. He has been fatally wounded by the Sarinjas, a cannibalistic breed of desert goblin. The quick-thinking Munsu convinces these beasts to spare his life, in exchange for the peaceful handover of Mon-ryon's appetizing corpse. Although skeptical of Mon-ryon's motives, Munsu sets out to continue the mission that the young idealist described. Accompanied by an army of ghost troops, unleashed using the powers of Angyo Onshi, Munsu liberates Chunhyan. After visiting her boyfriend's final resting place, she declares herself Munsu's bodyguard and, together, they set out on a mission to punish those who stripped Jushin of its original glory.

Ginga, a small town girl sets out to become the Emperors Seihi, highest ranked wife, undaunted by the many other women who seek the same title. Her energetic and eccentric ways aid in her in meeting new people, training to be a Lady of the Emperor and dealing with the drama that ensues.