Meikyuu Black Company

Meikyuu Black Company (迷宮ブラックカンパニー) is a manga series by Youhei Yasumura. It is serialized in MAGCOMI. It has been licensed in English as The Dungeon of Black Company by Seven Seas Entertainment.

Plot
Kinji, who lacks any kind of work ethic, is a layabout in his modern life. One day, he finds himself transported to another world—but not in a grand fantasy of a hero welcomed with open arms. He's immediately shoved into a terrible job! Now enslaved by an evil mining company in a fantasy world, Kinji's about to really learn the meaning of hard work!