Evan Froth lives his life from a distance.

Born in a peasant family, he has no desire to do anything besides what was ordained to him. However, everything changes when his village is attacked by demons. He manages to avoid being eaten, but when he wakes up, he and others find themselves in the dungeon of the very demon responsible for attacking his village.

"When I come back, I will accept anyone who's still alive," the demon announces.

And thus, Evan is thrown into a cruel experiment with no hope of escape other than death.