Kang Yise's Happy Ending

In a world where the celestial and infernal coexist, Kang Yise is an anomaly—an immortal being who has drifted through centuries, untouched by time. Choosing to carve out a quiet existence among humans, he operates a modest detective agency under a borrowed name. By day, he pieces together lost truths for ordinary clients; by night, he wrestles with the hollow weight of his endless life, hiding his true nature behind a calm and measured demeanor. But his careful anonymity shatters when a new client walks through the door. Kwak Rowan is a fallen angel, exuding an unsettling tranquility that belies the violence in his heart. His request is chillingly simple: he needs to locate a man named Kang Yise, a target he is determined to eliminate. For Yise, the shock is profound. He does not recognize his would-be assassin, nor can he fathom the grudge that could spark such a mission—especially against someone who cannot be killed. Despite the apparent futility of Rowan’s goal, Yise senses a deeper, more dangerous motive lurking beneath the surface. Bound by his own curiosity and the instinct to protect his fragile sanctuary, he decides to take on the case himself, becoming the detective searching for his own murderer. As he plays a careful game of deception, every interaction with Rowan becomes a tightrope walk. The question haunts him: can he keep his true identity hidden long enough to unravel the mystery, or will the fallen angel discover the truth and force a confrontation that even an immortal may not be prepared for?