Contracting the King of the Underworld from the Start? Are You Kidding Me?

[Apocalypse + Hades + Contracted Ghosts + Homemade Underworld Currency] An unexpected upheaval in the underworld causes its nineteenth level to begin overlapping with the human world. Abandoned by her heartless sister, the kind-hearted heroine accidentally forms a contract with Hades. After enduring countless trials and hardships, she transforms, takes her revenge, and becomes the new ruler of the underworld, mastering the world. (Told from the heroine's perspective (◦˙▽˙◦))

She emerged from the darkness. Her eyes were now blood red, and her snow-white hair had turned black. A terrifying aura rose around her!

Snow, who had once suffered every kind of humiliation, now sat upon a throne revered by all. She gazed coldly at the ghosts below. “Perhaps everything has worked out for the best. Rest assured, Hades, I will carry on your will!”