The Ruthless Killer's Revenge

Lee Hyun, the deadliest assassin ever produced by the Valley of Villains, blessed with unparalleled talent. As the final trial of his training, his master Gwi-hee sends five lethal beauties to hunt him down with murderous intent—but Lee Hyun, having already reached the realm of "absolute heartlessness," subdues them without a moment's hesitation and earns his master's approval. Reborn as the Valley's strongest killer, Lee Hyun steps into the outside world and crosses paths with the poisoned Yuk Si-eun, who is being hunted by Black Dragon Clan ninjas. Even as she begs desperately for help, he coldly turns away—until the ninjas' provocation draws a chilling killing intent from him, his gaze seizing the room like the edge of a blade.