A warrior from a post-apocalyptic future travels to 1997 to protect an AI scientist being hunted by an unfeeling — and indestructible — cyborg.

Tsubasa, a Tokyo schoolboy, gets transferred to the town of Hokkaido in northern Japan, and meets beautiful girls there.

Before eradicating humankind from the world, the gods give them one last chance to prove themselves worthy of survival. Let the Ragnarok battles begin!