Short story
"When the way to save civilization is to let the moss continue to lie - will you expose this six-thousand-year-old twilight deception?"
"Listen... The whale is saying... Long-short-long... This is the rhythm of 'destruction'..."
In the seventh millennium of the post-human era, the earth has entered the [Eternal Night] in the [Long Twilight Era].
An ocean planet where symbiotic moss covers 80% of the land, and civilization exists in units of "whale fall city-states".
All written records suddenly expired, and the only remaining information carrier was the luminous moss parasitic on the backs of the mechanical whales.
Intention: the meaning of self in life