Kinji, a layabout in his modern life, finds himself transported to another world, where he's immediately shoved into a terrible job; now enslaved by an evil mining company in a fantasy world, Kinji begins to really learn the meaning of hard work.

Kinji, a layabout in his modern life, finds himself transported to another world, where he's immediately shoved into a terrible job; now enslaved by an evil mining company in a fantasy world, Kinji begins to really learn the meaning of hard work.

Shia is determined to continue being a loyal corporate soldier, despite Kinji's best efforts; however, the company, and the dungeon it manages, seems to have a much more complex plan for her.

Several high-ranking members of the Demon Lord's Army are threatened by Kinji's meteoric rise and decide to take action against him; meanwhile, Ranga is haunted by a secret from his past.