In Penguin Village, humans live alongside talking animals and objects. Senbei Norimaki is one of these humans, and he's an inventor with the lofty dream of creating the world's best robot girl. The product of his efforts is Arale, but depending on your definition of perfect, she's anything but! Not only is Arale severely nearsighted, but she also has no common sense! At least she has super-strength, though that often proves to be a setback as well. Although she means well, Arale only causes trouble for her neighbors in the whimsical Penguin Village!

When Saga—now 15 years old—arrives at her home after a day of errands, her grandmother Regina discovers an old dress in the attic. At this point, Saga recalls the time her elementary class participated in a play titled "Princess and Fairy." She volunteered to play the role of the Princess while her rival Greta played the evil witch. The production of the school play reminded Sugar and the other fairies of the time "The Bear Pianist" played in the town not too long ago.

The war between the Terrans and the Vers Empire of Mars has ended, allowing humanity to blissfully enjoy their lives in a time of peace. Nineteen months later, however, the Vers princess makes a shocking public declaration: "the Terrans are a foolish race that covets resources, destroys nature, and are devoted to the pursuit of pleasure." And so, to protect their precious Earth, she calls upon her knights to take up arms, and the raging battle between the two civilizations reignites. Slaine Troyard has found a place among the Martians, giving Earth a short respite from the war against the Vers Empire. However, a peaceful resolution seems inconceivable. The various people who fought desperately for survival in the past now find themselves in the midst of yet another bloody and chaotic conflict, one that will forever alter the fate of humankind.

Second season of A Day Before Us.