Avsnitt 1

Ayane Isuzu destroys some Invaders, and collects the crystals they leave behind. While looking for more Invaders, she sees a girl fly across the sky. After school the next day, Ayane meets with a mysterious man who tells her to locate a girl called Miu Manazuru, for she is a Gate Keeper. Ayane gives the man a bag of crystals in exchange for money. That night, Ayane approaches Miu, and tells Miu to join her in her effort to destroy the Invaders . Miu is wondering what to do, when they are suddenly surrounded by Invaders...