Self-Deletion

In the future, the dead can be "downloaded" into new bodies, and memories can be extracted, bought, sold, or deleted. Everyone relies on "deleting pain" to find happiness. Lin Su alone refuses to erase the pain of his younger sister becoming a stranger. He follows the flow of time backward to find her, only to discover a blank space in his mind sealed by a "divine oracle". And the person ruling this city is the same person as him.