dupe of https://mangapark.io/title/427567-en-the-queen-s-secret-lessons-mature-official

Boasting a kempt appearance and brains to boot, Yaha seemed to have everything required to become the queen. But she lacked one very important skill - the one required upon nightfall in his majesty’s chambers. After being ignored by the king on their first night as a married couple, Yaha’s anxieties multiply amongst rumors that the gorgeous court lady Seo-kyung has been reappointed. In order to overcome this challenge, Yaha summons a famous “novelist” to the palace for some private lessons. It’s clear that Yaha has much to learn, but just how far will they take these lessons…?