Dorei Gaeshi no Hangyaku Maou ~Saijaku Shuzoku no Akuma ga Kindan Harem wo Kizuku made~

A century ago, the devastating war between humans and demons concluded with humanity’s decisive triumph. Under the divine protection of the Goddess, human forces overwhelmed the defeated demon race, driving their population to the brink of extinction. Since that era, every demon has been condemned to slavery from birth, spending their entire existence subjugated to human masters. Liebe, a young man who perished in an accident after enduring relentless bullying, found himself reincarnated into this harsh world as a member of the weakest demon race. Bound by an unbreakable slave contract, Liebe was forced into servitude as the personal pet of a frontier nobleman’s daughter. Though he desperately wished to rebel against his cruel circumstances, the magical chains of his enslavement rendered him completely powerless. However, Liebe possessed a unique gift: special eyes capable of perceiving the hidden weaknesses of his opponents. By fusing this extraordinary vision with magic, he successfully engineered a spell that could temporarily nullify his binding contract. Empowered by his newfound freedom and determined to change the fate of his oppressed people, Liebe resolved to become the beacon of hope for all demons—and rise as the most powerful Demon King the world had ever known.