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 helped you out so much,
and you turned on me in an instant.
Ich hab dir so oft den Arsch gerettet
und als Dank fällst du mir in den Rücken.
Siempre te ayudé
y me traicionas sin dudar.
Siempre te ayudé
y me traicionas sin dudar.
Après tout ce que j’ai fait pour toi,
tu m’as trahie.
Io ti ho sempre aiutato,
e tu ci hai messo mezzo secondo a tradirmi.
Você me trai na primeira oportunidade 
depois de tudo que fiz.
Предательство — вот твоя благодарность 
за всю мою помощь?