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.
Wasn't there something about a terrifying 
great king a long time ago?
War da nicht so eine Schote mit
einem großen König vor langer Zeit?
¿No había un rey malvado
hace mucho o algo así?
¿No había un rey malvado
hace mucho o algo así?
Avant, y avait un seigneur de la terreur
qui s’appelait machin truc, non ?
Non ricordi anche tu qualcosa riguardo a un grande
re spaventoso, una cosa di tantissimo tempo fa?
Não tinha uma história sobre um 
grande demônio muito tempo atrás?
Помнишь ведь, нам рассказывали 
про ужасающего Владыку тьмы?