Totsuka Maria was praying in a chapel at Seiseki Girls' Academy when a black cross comes falling from the sky. On that cross, was a fallen angel, bearing the sin of pride, Lucifer. Maria attempt to tend to the angel, but the floor falls out and she disappears. Lucifer finds herself in the depths of hell, and runs into the Demon Lord of Envy, Leviathan.
Isn't it common courtesy to state your 
own name before asking another's?
Gebietet es die Höflichkeit nicht, erst seinen
Namen zu nennen,  bevor man andere fragt?
¿No es más correcto presentarte primero?
¿No es más correcto presentarte primero?
Avant de me demander ça,
si tu commençais par te présenter ?
Non è forse buona educazione presentarsi,
prima di chiedere a qualcun altro il suo nome?
Não é bons modos dizer o próprio nome 
antes de perguntar o de outro?
Когда спрашиваешь чужое имя, 
принято сперва представиться самой.