😋I recommend "Reborn Prince Seductive" to you. The female protagonist was the daughter of a wealthy family. Because of a conspiracy, she jumped off a cliff and committed suicide. She was reborn in ancient times and became the concubine of the Crown Prince. At the same time, she also had modern medical knowledge. There is a scene in the plot that is similar to what you described. The male protagonist will give the female protagonist a "tonic" every night. The female protagonist is unconscious, and the male protagonist enters her room every night. However, this plot is only a part of the story. The entire novel has a rich plot and detailed descriptions. It's worth reading ~ I hope you like this fairy's recommendation. Muah ~😗