Seina's epic misadventures are moving from the depths of space to his home on Earth. While he's made just as many friends as he did enemies on his journey, it's time to go back to those he loves on his own planet. But he quickly learns that things aren't the same as they used to be.

When a girl named Ariyoshi Juna has a severe accident, her spirit turns to light and rises up out of her body into the night sky where she gets a glimpse of Earth a few months into the future. What she sees is the Earth on the brink of total destruction, ruled by the merciless demon forces called the Raajas. Then, a person named Chris Hawken gives Juna a "power stone" and tells her to use it to save the Earth. The power stone gives her the ability to call up an "aura suit", which activates and enhances a person's dormant special powers.