In a world where magic is the birthright of women, men are relegated to servitude or obsolescence. The kingdom of Orthea is ruled by a powerful sorceress-queen, and its society is strictly matriarchal, with magical ability determining one's caste. The protagonist, a young man named Ciel, possesses a rare and forbidden trait: he is immune to all forms of magic. This anomaly makes him a target for the state, which views magicless males as either threats or tools for dangerous experiments. To survive, Ciel hides his immunity while working as a lowly record-keeper in the royal archives. His quiet existence shatters when he inadvertently disrupts a high-ranking witch's spell during a public ceremony, exposing his nature to the court. Rather than executing him, the queen herself intervenes, revealing that Ciel’s immunity is the key to a cataclysmic prophecy: a magical blight is slowly consuming the outer provinces, erasing spells and draining witches of their power. The blight originates from a sealed, ancient male sorcerer known as the First King, who was defeated and imprisoned centuries ago. Ciel is the only being who can enter the blight’s epicenter without being unmade, making him both a weapon and a scapegoat in the queen’s political games.

The central conflict unfolds as Ciel is forced to join a royal expedition to the blighted lands, led by the queen’s stern and prodigious granddaughter, Princess Euphemia. Euphemia is a prodigy who loathes Ciel’s existence, as his immunity undermines the very foundation of her world’s order. Their journey introduces a cast of witches with varying motivations: a cynical battle-mage who lost her coven to the blight, a young novice whose faith in the matriarchy is shaken, and a court alchemist who secretly experiments on male magic-users. As they venture deeper, they discover that the blight is not a curse but a sentient force, a remnant of the First King’s consciousness that seeks to invert the world’s magical hierarchy. Ciel finds himself empathizing with the ancient sorcerer’s rage, understanding that the current kingdom was built on his betrayal and erasure. Simultaneously, Euphemia begins to question her grandmother’s rule when she uncovers that the royal family has been using the blight to eliminate political rivals, sacrificing outer towns to consolidate power.

The narrative arcs pivot around Ciel’s internal struggle between his survival instincts and his growing role as a symbol of rebellion, whether he wants it or not. A key arc follows the expedition’s collapse, where the party is split, forcing Ciel and Euphemia to rely on each other in the blight’s heart, leading to a fragile alliance built on mutual need. Another major thread involves the court alchemist’s betrayal, as he attempts to harvest Ciel’s immunity to create a synthetic magic that would allow men to cast spells, sparking a civil war. The climax does not resolve the kingdom’s tyranny but instead pivots to Ciel choosing not to destroy the First King or the queen, but to shatter the metaphysical barrier that separates male and female magic. This act unleashes chaos, as magic becomes unpredictable and accessible to all genders for the first time, leaving the kingdom in a power vacuum. The final arcs shift to a reconstruction phase, where former enemies must decide whether to forge a new society or repeat the old cycles of oppression, with Ciel and Euphemia now reluctant co-leaders of a fractured land.