On a splendid morning, an effervescently cheerful teenaged schoolgirl named A-ko sets off for school with her delightfully ditzy friend, C-ko. The duo are students in a marvelous futuristic city, but A-ko is about to run afoul of the wealthy and powerful B-ko, a young lady used to getting everything she wants—and what she wants is C-ko! Also, a vast and powerful alien fleet is about to touch down in Graviton City, and they're after something, too. Fortunately for us, A-ko’s no ordinary schoolgirl—she’s got super powers of her own!