The Moonlight and Frost Will Shine on You

Fantasy novels. The female protagonist is a little fairy who is not good at Taoism. After meeting the male protagonist, she learns Taoism and works part-time as a maid beside him. When the male protagonist did evil things for his father against his will, it was the female protagonist who used her kindness and purity to pull the male protagonist back from the abyss of degenerating into a demon. In troubled times where disputes arise, the male and female protagonists work together to calm down the troubled times and save the people from misery.