There's a story where the world banded against their savior, The Saint, and still hundreds of years later they regard all of her writings as books of prophecy, including the trashy bl fanfic she wrote, her decoy and real diaries, and her embarrassing attempt at drawing a manga. Whole organizations exist to break down and decipher these works, and at the time the MC reincarnates only a few "deciphered" pages have been declassified and released to the public.