I Can Easily Defeat SSS Ranks... This World Is Already Mine

In a world teetering on the brink of collapse, humanity receives an ominous email—the Aegis Mandate—triggering a catastrophic psychic event that fractures society into three factions: Law, Neutral, and Chaos. With birth rates plummeting and hope dwindling, cities transform into chaotic battlegrounds where ordinary people either become monstrous threats or relentless hunters. Ragnar Vhagar, once a solitary university student, finds himself unexpectedly thrust into the role of a Demon King, surrounded by goblins and haunted by a glowing soul crystal. His mission? To build a formidable domain and fend off invading heroes, all while navigating a perilous new reality.