Maria is glad she gets to see Lucifer again, believing that she's an angel, and then has her heart stolen by the Demon King. Lucifer forces Maria to follow her and lets her live a life of luxury. Meanwhile, Leviathan, who has strong feelings for Lucifer starts to get jealous over Maria because Lucifer won't pay any attention to her.
Levi is Onee-sama's Number 1, okay?!
Ich bin das Ein und Alles
von meinem Herzen, kapische?!
Soy la número uno, ¿entiendes?
Soy la número uno, ¿entiendes?
C’est moi qu’elle préfère, d’abord !
Sono io la preferita della Mia Signora, chiaro?!
A número um da Onee-sama
 é a Levi aqui, viu?!
Я номер один для сестрицы! Всё поняла?! 
А тебе вообще лучше исчезнуть!