The Dungeon of Black Company
At the center of the story is a slacker named Kinji. It's hard to imagine anyone lazier than him. The main character loves to waste time aimlessly and would probably continue doing so if he hadn't found himself in a fictional world. His carefree life comes to an end when Kinji becomes a slave in a company that mines rare minerals. Kinji will have to fully experience the meaning of grueling physical labor.