Wang Qingyu delivered packages for two years, spending almost all his salary on Anna, only to finally receive word that she had fallen for someone else again. When he was heartbroken and disillusioned, the Love-Brain Cash-Back System suddenly bound to him: as long as he spent money on love-brain behaviors, it would be doubled and refunded. He simply let go of his obsession, replanned his life, treated Fu Ya's family to dinner, and bought live-streaming equipment for Zhang Jia. The numbers in his account kept rising, and his net worth soared. That poor courier who had been mocked appeared driving a Maybach in the blink of an eye, the salesperson's expression changed on the spot, and his classmates stared with wide eyes. Yet he gradually understood that money could change a situation, but true relationships still relied on sincere hearts.