Hataraku Maō-sama! (はたらく魔王さま!?) is a Japanese light novel series written by Satoshi Wagahara, with illustrations by Oniku. The first volume was published in February 2011, and seven volumes have been released as of February 2013.
There have been two manga adaptations published by ASCII Media Works in Dengeki Daioh and Dengeki Maoh.
The animation studio White Fox is producing an anime television adaption that will premiere in 2013.
"In another dimension the Devil King Sadao is only one step away from conquering the world when he is beaten by Hero Emilia and forced to drift to the other world: modern-day Tokyo. As "conquering the world" are the only skills the Devil King possesses - and are obviously unnecessary in his new situation - he must work as a freeter to pay for his living expenses."