Lin Jian and Zhou Mo were dragged into a cruel system called "Happiness Optimization" to survive in seven twisted worlds. Every world is a morbid mirror of reality, and every mission tortures the bottom line of human nature. They fell in love with each other in the cracks of the rules with a slight resistance, and finally discovered the deepest horror: the system itself had long since collapsed, and the creator civilization had long since destroyed itself due to the same experiment. This is a struggle about memory, definition and existence, and the only victory is the first to admit that some things cannot be optimized and can only be destroyed.
Purpose: Survival between cracks