In the continuation of Honzuki no Gekokujou, Myne makes a life-altering decision after a difficult encounter with a noble. Renamed as 'Rozemyne,' she starts anew as the archduke's adopted daughter, facing intense noble society expectations and training. Overwhelmed by the pressures, the young girl finds solace when offered access to the temple's book room. With a chance to delve into countless precious books, Rozemyne's love for reading persists in this evolving tale set amidst a growing printing industry. Part 3 unfolds as a captivating journey into a world of books and ambition.