Love in the Moonlight season 1 is available in: Korean [Original] on Netflix Thailand
구르미 그린 달빛
Hong Ra On, disguises herself as a man and counsels men on dating. Due to a love letter she wrote for a client, she meets Lee Young - future Crown Prince Hyomyeong. Hong Ra On is unaware that he is the Crown Prince and Lee Young is unaware that Hong Ra On is a woman. The Crown Prince becomes interested in Hong Ra On. His eunuchs become aware of this and attempt to get Hong Ra On to become one of them.
A young Joseon woman who's lived her whole life as a man ends up as a eunuch in the royal palace, where she begins to bond with the crown prince.