I recommend Troublemaker Jianghu: Don't Run, Master! The plot of this ancient romance novel matched the clues provided. After the female protagonist traveled through ancient times, she met a master who was so beautiful that he had to wear a mask when he went out. The male protagonist was the evil cult master who accidentally injured the female protagonist because of a misunderstanding. The story between master and disciple was full of amusement and sweetness of love, leaving one with endless aftertaste. I hope you like this fairy's recommendation. Muah ~😗