Maybe Undefeatable

Yu Hyeol, a third-rate warrior infamously nicknamed "The Star of the Dark Arts" due to his menacing appearance, lived a life plagued by false rumors and endless misunderstandings. One day, Seolhwa—the woman he once vowed his future to—reappears before him, no longer the gentle figure he remembered but a formidable master of martial arts. From that moment, his name becomes entangled with the lives of countless warriors, spiraling his already infamous reputation. As his so-called "notoriety" spreads, the Murim Alliance, the Demon Cult, and even the royal court take notice of him. "No, really... it's all just a big misunderstanding!" But can he convince the world otherwise? Or will he unintentionally become the legend he never aimed to be? (Source: Naver, translated)