After ten years of practice, the cat demon Yan Ning barely takes human form and arrives in the human world, only to find it drastically changed. The apocalypse has come, and zombies roam. She just wants to cuddle with her caretaker. But as they get closer, his gaze towards her becomes increasingly strange. "Yan Ning, once more, please?" the man's voice is hoarse. Yan Ning's eyes are red at the corners, her eyes moist: "... As promised, for the last time."Qin Yu accidentally finds a cat demon among the zombies. She has terrifying combat strength and various magical abilities, becoming an object of admiration in all safe zones. Only Qin Yu knows she's not human. One day, Yan Ning suddenly disappears. Everyone thinks Qin Yu is just a pretty face favored by Yan Ning. After her disappearance, Qin Yu no longer hides his strength and becomes the strongest in the world. He searches everywhere but finds nothing. As his aura turns dark, Yan Ning returns, clinging to him as before. "Are you angry?" Everyone trembles, thinking the great demon lord is about to erupt, but he just smiles gently and pats her head. "I'm not angry, it's good you're back."