by Dark Blade (흑도)•Art by Mist Studio
Allen was a revered holy knight who fell deeply in love with a gentle young maiden, only to discover on their wedding night that she was in fact Carmilla, the terrifying Supreme Demon Queen who orchestrates the downfall of human realms. Betrayed, poisoned with demonic miasma, and stripped of his holy authority, Allen is left to die in the deepest subterranean abyss while Carmilla launches a devastating crusade against his homeland. However, his unyielding hatred burns through the miasma, awakening a dormant abyssal sovereign lineage within his soul. Surviving against eldritch abominations at the bottom of the underworld, Allen refines his sacred blade arts with forbidden demonic devastation, forging a lethal dual-affinity swordsmanship. Swearing absolute vengeance upon the woman who deceived his heart and destroyed his comrades, the fallen knight rises from the abyss to dismantle Carmilla's empire piece by piece. In a ruthless clash of love, betrayal, and dark sorcery, the vengeful husband marches toward the demon queen's throne to settle the score once and for all.
by Dark Blade (흑도)•Art by Mist Studio
Allen was a revered holy knight who fell deeply in love with a gentle young maiden, only to discover on their wedding night that she was in fact Carmilla, the terrifying Supreme Demon Queen who orchestrates the downfall of human realms. Betrayed, poisoned with demonic miasma, and stripped of his holy authority, Allen is left to die in the deepest subterranean abyss while Carmilla launches a devastating crusade against his homeland. However, his unyielding hatred burns through the miasma, awakening a dormant abyssal sovereign lineage within his soul. Surviving against eldritch abominations at the bottom of the underworld, Allen refines his sacred blade arts with forbidden demonic devastation, forging a lethal dual-affinity swordsmanship. Swearing absolute vengeance upon the woman who deceived his heart and destroyed his comrades, the fallen knight rises from the abyss to dismantle Carmilla's empire piece by piece. In a ruthless clash of love, betrayal, and dark sorcery, the vengeful husband marches toward the demon queen's throne to settle the score once and for all.
The world of The Man Who Vowed Revenge On His Demon Wife is a grim, aristocratic dark fantasy realm dominated by demonic hierarchies, ancient bloodline clans, and subjugated human populations. Spanning sprawling ancestral demon territories, subterranean abyss dungeons, and grand estate banquet halls, political power is deeply entwined with physiological and racial supremacy. High-tier demon lineages rule with absolute authority, treating human adventurers as lower-caste expendables or collateral in their cutthroat political maneuvers. The power system revolves around innate racial biology, external mana saturation, and esoteric lifeforce contracts. Pure-blooded demons such as the Oni possess overwhelming baseline physical power and regenerative capabilities, which can be further augmented through external conduits like National Mana Crystals - relics capable of amplifying magical energy and bodily reinforcement to devastating heights. Above ordinary mana mastery lies forbidden blood magic and life-binding contracts. Through rites such as the "Pact of the Strong Arm," entities trade their vital essence and remaining lifespan for instantaneous, exponential physical strength, bare-handed destructive capacity, and vampiric resilience. Power dynamics are commanded by three major power blocs:. 1. The Kuki Clan: An elite, high-demon patrician family led by patriarch Kuki Taigen, known for its strategic ruthlessness, political machinations, and monopoly over state mana crystals. 2. The Kamiki Clan: An aggressive Oni lineage seeking elevated status through arranged alliances, military prestige, and domestic purges. 3. The Ancient Vampiric Bloodlines: Reclusive, dungeon-dwelling immortals like Eliana, who operate outside demon-human societal structures and wield ancient pact-making authority. Universal laws govern this realm through biological contracts and information warfare. Blood pacts demand a direct exchange of life years for monstrous combat output, while parasitic organisms - such as the flesh-burrowing "Praying Mantis" worms - are used in conjunction with psychological torture, aphrodisiacs, and crystal recordings to shatter an opponent's soul, extract confessions, and enforce absolute subjugation.
Formerly an earnest human adventurer who believed in his marriage to the Oni noblewoman Ruka, Seishiro is transformed into a cold, calculating avenger after Ruka slaughters their young daughter Marika and leaves him to rot in an abyss dungeon. Stripping away his former mercy, Seishiro embraces Machiavellian pragmatism, employing psychological torture, blackmail, and unbridled violence to annihilate the high demon nobility from the inside out. Combat abilities and traits: Enhanced by the "Pact of the Strong Arm" forged with Eliana; wields monstrous bare-handed physical strength capable of pulverizing elite demon warriors; can consume vampiric blood for temporary combat surges; highly skilled in psychological warfare, tactical interrogation, and hand-to-hand brutalization.
Chapter 1The haughty and ambitious heiress of the Kamiki Oni clan. Driven by an insatiable desire to climb the demon nobility ladder, she heartlessly murdered her half-human daughter Marika and framed Seishiro to finalize an alliance with the prestigious Kuki family. Her narcissistic pride crumbles into sheer panic when Seishiro resurfaces with recorded proof of her crimes, reducing her to a terrified political puppet. Combat abilities and traits: Pure Oni physiology granting natural superhuman resilience, enhanced muscle density, and high-level demon martial arts; commands the Kamiki clan's household guard and political assets.
Chapter 1An enigmatic, ancient vampire noble residing in the depths of the subterranean dungeon. Unbound by the social squabbles of the demon aristocracy, she takes an amused interest in Seishiro's bottomless thirst for vengeance. She acts as both his supernatural benefactor and dark mentor, providing the power he requires while claiming his lifespan as payment. Combat abilities and traits: Progenitor-level vampiric blood manipulation; ability to forge life-binding contracts such as the "Pact of the Strong Arm"; immense baseline magical presence and immortality.
Chapter 1The arrogant 26-year-old heir of the esteemed Kuki clan. Shishio orchestrated the seduction of Ruka and facilitated the murder of Marika as a means to expand his clan's dominion. Despite his outward veneer of noble supremacy, his bravado instantly shatters under physical agony and the threat of harm to his family. Combat abilities and traits: High-demon elite combat arts; mana manipulation enhanced directly by national mana crystals; superior physical speed and armored magical defenses.
Chapter 1The sadistic younger sister of Shishio Kuki. Possessing a deep-seated contempt for humans and hybrids, she actively abused and tormented young Marika before the child's execution. Her cruelty is matched only by her cowardice when captured and weaponized as psychological leverage against her brother. Combat abilities and traits: Aristocratic demonic sorcery; high-society influence; command of low-level clan retainers.
Chapter 6The grand patriarch of the Kuki family and the overarching architect behind the conspiracy that destroyed Seishiro's life. Cold, calculating, and purely utilitarian, Taigen demanded Marika's death merely as a loyalty test to ensure Ruka possessed the heartlessness required to marry into the Kuki bloodline. Combat abilities and traits: Mastermind-level political authority; supreme commander of the Kuki clan's private armies; access to national strategic mana vaults and high-tier ancient relics.
Chapter 9The gentle, innocent daughter of Seishiro and Ruka. Caught between human blood and Oni lineage, she suffered relentless abuse from both her mother and the Kuki siblings before being murdered in cold blood. Her hidden diary serves as the emotional foundation and guiding evidence for Seishiro's revenge campaign. Combat abilities and traits: Non-combatant; possessed latent hybrid physiology.
Chapter 1A formidable ogre enforcer initially tasked with executing Ruka's violent mandates. After attempting to assassinate the resurfaced Seishiro and being effortlessly overpowered, he is caught in an inescapable web of blackmail and coerced into acting as an unwilling double agent within the Kamiki household. Combat abilities and traits: Ogre-tier brute strength; heavy bludgeoning combat style; dense muscle armor capable of shrugging off standard physical blows.
Chapter 2Ch. 1 - 3
Following the brutal murder of his daughter Marika and a near-fatal betrayal by his wife Ruka, human adventurer Seishiro Kanki is cast into the abyss where he enters a soul-binding "Pact of the Strong Arm" with the ancient vampire Eliana. Empowered with monstrous bare-handed strength at the expense of his lifespan, Seishiro infiltrates Ruka’s high-society memorial banquet and effortlessly decimates her elite guard detail. The battle marks the public return of the presumed-dead husband, who openly establishes a reign of psychological and physical terror over the Kamiki household.
Ch. 4 - 5
Pivoting from direct slaughter to calculated ruin, Seishiro unleashes recorded audio evidence proving that Ruka orchestrated Marika’s murder to secure political standing with the demon nobility. By orchestrating compromising, aphrodisiac-fueled scenarios, he completely shatters the pride and resolve of both Ruka and her top ogre enforcer, Amatsugawa. The confrontation concludes with the Kamiki heiress thoroughly subjugated and reduced to an obedient political asset under threat of total social and physical execution.
Ch. 6 - 9
Seishiro expands his vendetta toward the true architects of his misery by ambushing the elite heir Shishio Kuki, matching the noble's crystal-enhanced mana strength with raw vampiric blood boosts. After capturing Shishio’s sadistic sister Satori to dismantle the heir's mental defenses, Seishiro subjects Shishio to gruesome "Praying Mantis" parasitic worm torture in the dungeon depths. The interrogation breaks Shishio entirely, exposing grand patriarch Kuki Taigen as the mastermind who ordered Marika's death as a loyalty test and setting the stage for a total war against the Kuki Clan.
