High school student Hyogo Kato (Kato Hyogo) suddenly woke up in an unfamiliar apartment room. Not understanding the situation, he left the room, and before his eyes lay a desolate landscape of Japan.

Kato, aimlessly wandering through the ruined cityscape, is repeatedly attacked by gigantic creatures he's never seen before and abnormally evolved wild animals.

Kato flees for his life from the vicious creatures.

Amidst this, he encounters a man.

The man's name is Saeki.

He was a traveler who made a living as an adventurer in this desolate world.

Kato, whose life was saved by Saeki, asks about the desolate cityscape and the mysteriously vicious animals.

What he hears in return are astonishing words!

That twenty years have passed in this desolate world since the era Kato lived in.

That occasionally, individuals like Kato appear in this post-apocalyptic world, having transcended time.

And that those who appear having transcended time are called "Awakened Ones" and all uniformly possess special "abilities."

Why did Kato wake up in a ruined future?!

What exactly happened during these 20 years, and why did the world perish?!

And who exactly is he, suddenly awakened in this post-apocalyptic era?!

The truth of the post-apocalyptic world is gradually revealed...

An adventure story begins, where boys and girls use their special powers to journey through a ruined Japan.