[DeepL Translation - needs review] Introduction to Volume 1: Sueto Sumihara loses a lot of blood and is losing consciousness as a result of a bus accident.
As he is dying, a passenger takes a video of him.
He wakes up in a cave he has never seen before, in a different world.
In this world, it seems that people earn their living by mining magical ore.
Steptoe tries to mine, but is unable to dig out any ore at all.
A girl of the sheep tribe appeared in front of him in impatience.
That was his ...
