Aboard the Edens Zero, a lonely boy with the ability to control gravity embarks on an adventure to meet the fabled space goddess known as Mother.

God created nine races in the ancient times. Humans were the weakest, most ridiculed race among them. Light, a human boy, was fortunate enough to be invited to join a party of all nine races called the "Assembly of the Races." He was happy being a member for a while, but that was a short dream. His hopes were only to be betrayed by his fellow members at the largest, most heinous dungeon "Abyss." After surviving by himself at the bottom of Abyss, Light learns the true meaning of his gift "Unlimited Gacha." Light will rise from the worst despair to build his own empire of the strongest players.

The story begins the day before the graduation ceremony. Five middle school girls each are preoccupied with their real everyday lives. These girls meet each other in a fantasy world after being sent there through a sudden occurrence. There, they learn about the impending crisis that this world is facing. The way to avert this crisis is for the five to collaborate and bring their five hearts together as one through dance. However, the five cannot come to love the world, and cannot tell their true feelings to one another, so their hearts are unable to unite. The time limit is fast approaching. Can the dance of the five girls save the world? And will they be able to graduate?

Japan, 2019, just before the dawn of a new era. Suddenly, a rift to another dimension appears in the sky, revealing an alternative world "Shinkoku Nippon," with the sky and the earth upside down. This parallel world keeps the former militarism, with its era being Eternal Showa. The military invades the real Japan with giant humanoid robots called "GARANN" and their gas weapons "GENMU", rendering our modern weapons ineffective. "Shinkoku Nippon" instantly seizes the government and achieves de facto conquest of Japan. The new era, "Reiwa," has not arrived for Japan.