Ep. 1: Fallen Angel Lucifer Falls from Sky and Meets Demon Lord Leviathan

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Maria Totsuka prays in a chapel at Seiseki Girls' Academy when a black cross descends from the sky, carrying Lucifer, a fallen angel burdened by the sin of pride. Maria attempts to care for the angel, but the floor collapses beneath them, causing both to vanish. Lucifer awakens in the depths of hell, where she encounters Leviathan, the Demon Lord of Envy. This sequence marks the initial arrival of the prideful angel in the underworld and her first interaction with one of the seven demon lords. The narrative focuses on the sudden transition from the academy chapel to the infernal realm, highlighting the immediate consequences of the cross's descent and the subsequent meeting between the fallen angel and the envious demon lord.