Forbidden SIREN

Siren Maniacs - Hidden Message


A message hidden behind the book's cover.



Interpretation
You can assume the mentioned flower to be a Midnight Pimpernel and the item "sleeping beneath the earth", "cradled in the roots" of the flower to be the Mana medal, like in Risa's Tabori stage. The hanakotoba associated with the pimpernel is a hidden religion, and it blooms only at midnight.