after main plot of hazbin hotel

Lucifer is called to Heaven to watch an angel be punished for speaking her opinion at the meeting following the last extermination. He feels responsible for her, though more importantly, more driven to end the corruption of Heaven than ever before. ---Please watch ALL of Hazbin Hotel before reading, as this takes place after the main plot. Take note, that none of my ideas are canon, and I am taking some liberties with things that aren't explained in the show or adding a few minor details. Thank you! <3