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.
I stand atop of the Seven Mortal Sins.
Ich stehe den sieben Todsünden vor.
Estoy sobre
los Siete Pecados Capitales.
Estoy sobre
los Siete Pecados Capitales.
Je suis le chef des péchés capitaux.
Io domino i Sette Vizi Capitali.
Eu lidero os Sete Pecados Capitais.
Я стою во главе семи смертных грехов.