Lu Xuanji travels through the bookshelf dynasty. As a princess from the former dynasty who is very open-minded and feels that the change of dynasties is natural, she has to complete the task of educating the male protagonist, the biggest villain in the book, and drag him back from the evil ways before he can return to the modern era.
She disguised herself as a man and became the teacher of the male protagonist who was still the "puppet emperor", but as she came into contact with him day by day, she developed a secret love for him.
