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.
but there are times when 
I'm jealous of someone,
Aber manchmal bin ich neidisch
auf andere und frage mich,
pero a veces me dan envidia los demás
pero a veces me dan envidia los demás
mais jalouser les autres
ma a volte anche a me capita
di essere invidiosa di qualcuno,
mas às vezes sinto inveja dos outros,
...но иногда я завидую другим... и сожалею о том, 
что не встретила того, кто бы выбрал меня.