Nymph summary: Hayun, who was struggling on his own, rescued a Persian cat who was almost hit by a car. It was a good deed without any meaning, but the cat brought a long-haired woman lying naked in front of her house as if she were boeun. Hayun misunderstood her as a fan and tried to kick her out. However, she insisted that she was a guardian angel and persisted around Hayun. She speaks and acts very differently compared to ordinary people. When the situation is twisted, Hayun is forced to hire her as a manager and live together. Habi is the cat that brought her along. But the more I look at this woman, the more difficult it is. Is she really… an angel?