Hell hath no fury like Satan on fries. After being soundly thrashed by the hero Emilia, the Devil King and his general beat a hasty retreat to a parallel universe, only to land plop in the middle of bustling, modern-day Tokyo! Lacking the magic necessary to return home, the two are forced to assume human identities and live average human lives until they can find a better solution. And to make ends meet, Satan finds gainful employment at a nearby fast food joint! With his devilish mind set on working his way up the management food chain, what will become of his thirst for conquest?
Hell hath no fury like Satan on fries! Sadao Maou, the Devil King, has finally been promoted to store manager! And who should move next door to his fortress (actually a tiny studio apartment in a dingy walk-up) but a lovely kimono-wearing lass. But the former devil-crushing hero Emi Yusa is none too pleased with this turn of events, to say nothing of high-schooler Chiho Sasaki, who's still nursing a terrible crush on the Devil King. Meanwhile, a Sentucky Fried Chicken has opened up right across the street from Sadao's beloved MgRonald! It's the first real test of his managerial prowess, and he's facing a pay cut unless he can top SFC's sales! Between the two new neighbors, the Devil King's troubles are anything but part-time!
A portal opens in the courtyard of the Devil's Castle (a tiny walk-up). From it emerges a little girl who calls the Devil King 'Papa' and the Hero 'Mama.' Ashiya and Chiho are shocked to discover that Maou and Emi had that kind of relationship, but nobody's more surprised than the two new 'parents.' Will Maou the breadwinner be able to make the grade when it comes to child rearing? And will this spell the end of the starry-eyed Emi's romantic ambitions?
Hell hath no fury like Satan on fries! With his beloved MgRonald closed for renovations, the Devil King's out of work! Worse, the apartment he shares at Villa Rosa Sasazuka has gotten damaged thanks to his fight with Gabriel, which means the household has to temporarily vacate the premises. Having lost both his title and his vast land holdings, the Devil King takes a part-time job at his landlady's niece's beach house - and, of course, Chiho and Emi insist on coming along. It's summertime at the beach, but the Devil's still got work to do!
Urushihara's been scammed by a corrupt door to door salesman! Maou goes to their office to get back his money but what will fortune have in store? On his way back, Maou ends up bringing home an abandoned silver cat. As they search for its owner, this silver feline beings to get them into all sorts of trouble. The Maou crew heads out to buy Alas Ramus proper bedding to sleep in as they are joined by Emi in an apparently feel-good family outing that has her holding her head in disbelief. Then high school girl Chiho reminisces about the time she started first working her part time job at MgRonald and first met Maou, the time when she was still just a normal school girl like any other.
Emi's going to Ente Isla with Alas Ramus! Still in Japan, Maou decides to get his driver's license for his work at MgRonald, but he can't help worrying when the Emi's return date passes without her arrival. After his apprehension causes him to bomb his exam, the Devil King meets a strange pair strangely unsuited to Japan... Could they know something about Emi?!
