Just as peace is beginning to reign in Azusa's home, a young elf named Halkara shows up pleading for her help. Halkara says that an energy drink she made angered a terrifying high demon, Beelzebub, who is now out to kill her. Azusa would prefer to avoid anything that might ruin her slow life, but she can't just leave the poor girl to die, so she reluctantly agrees to shelter her...
Also, flying around in houses 
in the form of a fly
وأيضًا، الطّيران في المنازل وأنا ذبابة
Als Fliege in den Häusern
herumzufliegen ist zudem
E poi, volare in giro nelle case in forma mosca
Além disso, voar pelas casas
na forma de mosca
А ещё летать по домам в форме мухи —