I'm Not a Demon God!

[One female lead + no brainless decisions + thrillingly satisfying + no saintly protagonist + System] The bizarre Demon Abyss has ravaged the human world, and the Twelve Saints have betrayed humanity. As the demon race marches on the city gates, and the sun no longer belongs to humanity... Whose era is this, after all? With the city walls about to fall and humanity on the brink of extinction... Some saw the figure of a youth clad in demonic armor, with a nine-headed black dragon at his side, standing alone atop the ruins of civilization. His blade seemed drenched in blood as he gazed coldly at the gods, demons, and monsters filling the sky. The curtain of a new era slowly rose before him. He raised the tip of his blade and whispered to all living things: “Have you... ever felt death?”