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 lid to the underworld has opened.
Die Tore der Hölle öffnen sich.
Abrió la puerta del inframundo.
Abrió la puerta del inframundo.
Un passage s’ouvre
dans les enfers !
Si è aperto un portale infernale.
O portal para o submundo se abriu.
Врата между мирами отворились.