Since Zhao Youyue had finally decided to sacrifice a high popularity character card this time, she was, of course, extremely intent on creating an iconic character. To securely succeed in creating an iconic literary female character, she certainly needed a template to refer to.
This template was the character in another world called "Amano Tooko." She was the heroine of "Book Girl"[1].
However, because no extended anime versions of "Book Girl" had ever been released, and there was only the animated film and OVA available, it was not widely known. The differences between an anime and a novel are really quite vast.
Tonicquill: On the other hand, Dr. Jekyll and Mr. Hyde was written in FOUR days (differs by sources, but general consensus was that it took mere days) by a cocaine-fueled Robert Louis Stevenson while sick with tuberculosis and suffering from recent lung hemorrhaging – selling 40,000 copies in six months and 250,000 pirated copies being produced at the same time.