Oritsu Toshokan No Hari Nezumi

Exia is the youngest person to pass the exam to become a “magician,” and is highly respected in the Royal Library as a talented woman. Despite her perfect skills and knowledge, she is told for the second time that she has failed the exam to be promoted to “senior magician”. She is worried because she is told that she lacks the necessary qualities. One day, a man who tries to enter a dangerous area of the library takes a liking to her, and she accepts his offer to guide him. To her surprise, he turns out to be Ivan, the first prince of the country...?

Through her encounter with Ivan, she gradually discovers what she has been missing.