Gravity Threshold

In the future, humans have cracked the ultimate secret of consciousness: memory, which has physical quality. The pain, ecstasy, regret, and love you experience form the "weight" of your soul. The more unforgettable the memory, the greater the mass, the stronger the gravity you will experience; on the contrary, if your mind goes blank, you will float directly into the stratosphere like a balloon that has lost its weight. In this world, being "down to earth" is the ultimate privilege of the powerful. Rich people pay high prices for other people's pain and unforgettable love, just so that they can walk steadily on the marble floor. What about the poor? In order to exchange for food and survival resources, they were forced to enter the "Memory Pawn Shop" and slowly remove the most precious fragments from their minds. They became lighter and lighter, began to float when walking, and needed to wear heavy lead shoes. Until one day, they sold the last memory of their mother, and the lead shoes could no longer hold them back. They would scream in the streets and slowly rise into the air. If you look up at the sky in this world, you will see that the earth has a "ring" like Saturn. Those are not meteorites, but billions of "weightless people" who have completely lost their memory. They wander around the outer reaches of the atmosphere like transparent jellyfish, never coming down.