Awakening in another world meant inheriting another life—specifically the powerless body of Dominic Nocturne von Morningstar, a cursed demon prince. A childhood betrothal to the Seven Daughters of the Seven Satans had drained him entirely: through forbidden contract magic, every ounce of his innate talent and sin affinity flowed into seven supposedly weak girls. Now those seven command absolute power over Wrath, Greed, Lust, Gluttony, Sloth, Envy, and Pride respectively. All seven are dangerously, obsessively devoted to me. What they don't know: I am not Dominic. Within this cursed frame lies an unexpected advantage—the Lucifer System. A cheat that promises reclaimed strength, rewritten fate, and the power to challenge the Satanic order itself. My survival depends on a razor-thin lie. Master the system. Deceive seven demon wives hungry for my attention. Survive the hellish trials that await. Endure a world determined to erase me. All without revealing what I truly am. Because if they ever learn the truth—if the mask slips even once—paradise becomes an eternal prison of my own making.