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.
The place where the
Seven Mortal Sins that rule Hell gather.
Hier versammeln sich die sieben Todsünden, die gemeinsam über die Hölle herrschen.
Donde los Siete Pecados Capitales
que gobiernan el Infierno se reúnen.
Donde los Siete Pecados Capitales
que gobiernan el Infierno se reúnen.
Ici résident les sept péchés capitaux
qui gouvernent les enfers.
Qui si radunano i Sette Vizi Capitali
che governano l'Inferno.
É onde se reúnem os Sete Pecados Capitais 
que dominam o Inferno.
Место, откуда семь смертных грехов 
правят всем адом.