▁through ▁a ▁gate ▁to ▁modern ▁Tokyo , ▁Japan . ▁However , ▁due ▁to ▁the ▁lack ▁of ▁magic ▁in ▁the ▁modern ▁contemporary ▁world , ▁both ▁Sat an ▁and ▁Al ci el ▁change ▁into ▁forms ▁representing ▁what ▁they ▁would ▁look ▁like ▁if ▁they ▁were ▁human . ▁In ▁order ▁to ▁surv ive , ▁Sat an ▁ ▁takes ▁a ▁part - time ▁job ▁in ▁a ▁fast ▁food ▁restaurant ▁named ▁M g R on ald , ▁while ▁Al ci el ▁serves ▁as ▁his ▁hous eman . ▁One ▁day , ▁Sat an , ▁who ▁now ▁goes ▁by ▁S ada o ▁Ma ō , ▁meets ▁a ▁girl ▁who ▁is ▁actually ▁Em ilia ▁in ▁the ▁form ▁of ▁E mi ▁Y usa . ▁The ▁story ▁then ▁unf olds ▁and ▁expl ores ▁the ▁personal ities ▁of ▁each ▁of ▁the ▁characters ▁and ▁their ▁moral ▁values . ▁More ▁characters ▁show ▁up ▁from ▁En te ▁Is la ▁and ▁they ▁too ▁face ▁the ▁new ▁world ▁d ile mm as , ▁often ▁com ically . ▁ ▁Char acters ▁ ▁Main ▁characters ▁▁▁ ▁( an ime ) ▁Sat an ▁Jacob ▁is ▁the ▁Dem on ▁Lord ▁from ▁En te ▁Is la . ▁Due ▁to ▁the ▁actions ▁of ▁the ▁Hero ▁Em ilia ▁Just ina ▁and ▁her ▁compan ions , ▁he ▁was ▁transport ed ▁to ▁modern ▁day ▁Japan ▁with ▁Ash i ya ▁and ▁changed ▁into ▁human ▁form . ▁To ▁surv ive ▁in ▁Japan , ▁he ▁adopt s ▁a ▁Japanese ▁name ▁similar ▁to ▁his ▁original ▁name , ▁S ada o ▁Ma ou , ▁and ▁works ▁part - time ▁at ▁a ▁M g R