It’s the not-too-distant future, and a metropolis flourishes in the crash site of an alien spacecraft. A-ko, a teenager growing up in this city, enjoys the life of an ordinary schoolgirl… along with incredible superhuman strength! But her carefree days are numbered. Her school rival, B-ko, is not content to live in the shadows any longer. A-ko’s superpowers and good fashion sense may not be a match for B-ko’s evil genius and Mega-Powered Fighting Robots of Doom!
Sixteen years have passed since a mysterious alien ship crashed on Earth. Graviton City, once leveled by the ship’s crash, is now a bustling metropolis. Within the city’s high school, superhuman high school student A-Ko Magami dukes it out with the diabolical genius B-Ko Daitokuji, who will stop at nothing to win the friendship of A-Ko’s buddy C-Ko Kotobuki. Meanwhile, in outer space, another alien ship is on course towards Earth to find its planet’s lost princess.
A-ko is the brawn, B-ko is the brains, and C-ko is, well, C-ko. They’d make a great team, but A-ko and B-ko are rivals for C-ko’s friendship, and if that wasn’t confusing enough, there’s an army of extra-planetary forces gunning for her too. The battle begins, though not without some comedy!