The Devil is a Part-Timer!

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. The story is about a demon king named Satan who is about to conquer his own world when he is suddenly transported to Tokyo of our world and ends up working part-time at a fast food restaurant. 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.

Plot
Devil King Satan Jacob 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 adopt the name Sadao Maou and work as a freeter to pay for his living expenses!