Principles and Practices of Lovemaking

After suffering a genital injury during sex, the character ‘Sungjae’ is suddenly transported to the Joseon Dynasty. There, Sungjae is quite surprised by the sexual openness of the society at that time and feels relatively satisfied. However, he soon decides to find a way to return to his modern world. To achieve that goal, Sungjae begins to take on two important tasks. The first is to carry out the mission of saving the heir to the throne of the court. The second is to write a guidebook called ‘Principles and Practices of Sexuality’ to encourage childbirth and increase the population of this dynasty.