Misumi Nagisa is an extremely sporty, popular student who hates studying, and has a very extreme sense of justice, Yukishiro Honoka is a top student who appears to be elegant, but is actually very clumsy. They are both second year students at the Verone Middle School for girls. One night Nagisa and Honoka meet Meppuru and Mippuru, strange creatures falling from the sky.

They have fled to earth because the evil Dotsuku-zone has overcast their homeplanet, Hikari no Sono. Meppuru and Mippuru award Nagisa and Honoka the power to transform so they can fight in order to protect Earth. The two girls, who have totally different interests and personalities, unite their powers and fight against the enemies that are sent out from the Dotsuku-Zone. Will they be able to protect Earth?!