When Y/N follows their cousin, Kagome, down the ancient Bone Eater’s Well, they expect a brief glimpse into Kagome’s secret life in Feudal Japan. Instead, they are thrust into a world of violent spirits and legendary warriors. Upon arriving, the group is intercepted by the cold and formidable Sesshomaru, a powerful Dog Demon who famously despises humanity. While Inuyasha stands ready for a familiar sibling brawl, the atmosphere shifts when Sesshomaru’s icy gaze lands on Y/N. Rather than dismissing them as a "fragile human," he finds himself inexplicably captivated by Y/N’s presence. As the journey unfolds, Y/N must navigate the dangers of the Feudal Era while caught in the middle of the brothers' legendary rivalry. What began as a simple trip to meet Kagome's boyfriend turns into a slow-burn supernatural drama, as the heartless Lord Sesshomaru begins to experience a protective, possessive pull toward the one person he was never supposed to care for.