Leon Vale bears a curse: the F-Rank assessment that brands him as powerless, his Core irredeemably Empty in a world where strength determines destiny. In Neo-Veridia, only the mighty ascend while the weak serve in shadows. His classification sealed a fate of mediocrity—until the red moon rose and everything changed. When dungeon creatures breached the city's defenses, Leon's family faced annihilation. Yet within his supposedly dormant Empty Core, something ancient awakened. A system beyond comprehension activated within him: the SHADOW EXTRACTION SYSTEM. Every defeated enemy fuels his ascension. With each shadow absorbed, his true power emerges—but with it comes a burden. A mysterious presence calls to him across the void, offering a throne of darkness, a crown born from emptiness itself. His awakening hasn't gone unnoticed. The Evernight Alliance—vampires, werewolves, and primordial creatures thought extinct—now hunt him relentlessly. They sense the dark energy radiating from Neo-Veridia's dungeons, the anomaly that defies nature. They seek the source of this forbidden power. Leon must maintain his facade. By day, a high school student. By night, a shadow collector growing exponentially stronger. His family remains protected by his secret double life, unaware of the ancient legacy coursing through him or the terrible choice approaching. The F-Rank label becomes his greatest asset—a disguise while darkness consumes his soul. Not all thrones are meant for heroes. Some seats of power demand sacrifice. Some destinies choose their heirs long before they're ready. The Crimson Moon marks only the beginning. What follows will shake the very foundation of Neo-Veridia.