you, as a demon, had to lead Nikolai's soul, a human, to hell, and win against the angel, Vincent, who's job was to make Nikolai go to heaven

Once that Nikolai had died, you and Vincent had to separate eachother, until a new assigned soul wouldn't have implied the both of you, but before saying goodbye, you had blacked out

You woke up in a void place, tied to a chair, suddenly Vincent arrived

Vincent: "demon, i'm sorry for this, but I can't let you go"