I recommend I am the CEO's Secretary to you. The female protagonist of this book was the CEO's chief secretary. She had to face her own persistence because she was deeply immersed in the male protagonist. The male protagonist originally liked the secretary's mother and had a mother fetish. Later, he fell in love with the female protagonist. This is a short story. If you want to read more of this kind of fast novels, you can read the completed "Dressed as a 90's Spoiled Wife" or "The White Moonlight of a Tyrant". I hope you like my recommendation.