Set hundreds of years after the original, Yamato 2520 chronicles the adventures of the eighteenth starship to bear the name, and its battle against the Seiren Federation. On a planet harshly ruled by the Serien Federation, a group of earth teenagers discover the ancient hulk of the Earth Federation Battleship Yamato. By stealing it's data disk the teens are able to use the Serien's own automated ship yards to construct a new Yamato. (Source: Wikipedia)

The show starts with the tale of Chitose Fujinomiya, a girl who goes from riches to rags and back and remains a snob despite it all. When her wealthy father dies, remaining debts leave Chitose almost broke, and she is kicked out of the affluent Tokai no Gakuen, or City Academy. She is left with nothing in the world but the clothes on her back and one pink goldfish named Gyopi-chan, the only memento she has of her father. Wandering lost, she collapses on the grounds of the poor-but-happy Inaka no Chugakko (Country Jr. High School), where the students are rough if friendly, and farm animals regularly roam the school grounds and even attend class. Recovering, she enters into the school but is repelled by its air of poverty, to which she is unaccustomed. (Source: AnimeNfo)

In the Kagami household, the old Western palm-sized mirror has been passed from from generations to generations. Akko-chan has been taught about the importance of the mirror and when she finally receives it from her mother, she cherishes it with all her might. One day, in the midst of a disturbance made by Taishou and his gang, Akko-chan accidentally broke the mirror. She made a grave and buried the broken pieces in the backyard. That night, Akko-chan was awakened by a flash of light and a kind voice which belongs to the Queen of the Mirror Kingdom. The Queen expresses her gratitude to Akko-chan for valuing the mirror so much and offers her a gift—a magical compact mirror. Whenever Akko-chan sings the magical words, she will transform into anything she wants. (Source: ANN)

During Sally's coronation ceremony in the magic world, she hears her human friends back on Earth are in trouble. Despite the warnings from her parents, she escapes to Earth to help her friends. Because she was caught using magic in front of humans, she had to erase her friends' memories. Now Sally will remain on Earth so she can regain Sumire and Yoshiko's friendship while helping other humans in trouble. This is a sequel and reboot of the original series.