In the world of Ente Isla, the Demon Lord Satan has attempted to conquer humanity using an enormous army of demons. But when he almost succeeds, mankind's champion, Hero Emilia, thwarts his plans, forcing him to retreat into a portal that leads to a world unbeknownst to him—Earth.
Along with his faithful servant Alsiel, Satan stumbles upon the modern-day city of Tokyo without any knowledge of the world itself. Completely out of their depth, they gain some information from a police officer, but Satan still has one more problem—money. In order to survive with his greatly diminished powers, he guises himself as a human named Sadao Maou, lives in an apartment, and becomes a part-timer at the fast food restaurant MgRonald's. Determined not only to conquer Ente Isla but also Earth, Sadao strives to become a full-time employee in his job, as he believes that it would be a step forward in his conquests.
Things begin looking up for the once all-powerful demon as he ventures through his everyday life—his job, his home, and his relationships. However, a major setback pops up when Emilia, the hero who drove him out of Ente Isla, suddenly appears...
In the modern world, Its not easy to live a decent life. You don't get a good life.... you earn it yourself .And having a good job is not an option but a necessity . No matter who you are.. a middle aged man, a young man,a boy, or even the demon king..you need money or you are done for. And our friend Maou here is no exception either ... After escaping the battlefield of a war in his world and accidentally stumbling upon earth ,and after loosing most of his powers He now needs to work as employ in a burger joint to pay
his living expenses.
As i mentioned before the story is about Maou , the devil king, who after escaping the battle grounds of an ongoing war in his world against the heroes , reaches earth along with his partner and finds out he has lost most of his powers . He then decides to work at a fast food joint to earn his living and also find a way to reach his home. He also meets Emi, who was the hero and the sworn enemy of the devil, and finds that she reached earth by following maou and cannot go back as she has lost her powers too. We then follow the life of maou who now has accepted his new life and now wants to serve humans rather than killing them and conquer the restaurant as the best employ .
I would really like to say that its one of the most funniest and interesting concept for a novel i have ever seen. The book has a good story, but it's strongest point is its interesting cast. It shows how the most common thing can cause big dilemmas.... in a comical way. The jokes are also really good and even the common ones feel kind of new on these characters.The art in the novel is done really well. It has one of the finest art and character design u can ever seen in a light novel .
Now I like to divide this series in 2 parts , Pre volume 12 and post volume 12.. because from volume 12, we see a lot of changes in series . For the first 11 volumes, there is verry little development for maou and other characters. The pace of the story is also very slow. But from volume 12, we see a lot of plot twists, character development and improvement in the relationships (Yes, i am talking about maou and emi).
In conclusion ..its a great story with interesting and charming cast of characters . Even if you watched the anime adaptation I would still highly recommend you to read this ... you will not regret it.