A story about a "stand-in" who hustles to extend his lifespan. The protagonist, Li Gouri, is bound to a mysterious system: whenever he successfully cuckolds someone, the person being cuckolded is cured of illness, grows stronger, and gains longevity—while Li Gouri earns a corresponding lifespan reward. The system possesses powerful time-travel abilities, dispatching orders across history, the future, parallel universes, and even alien worlds, but Li Gouri can only accept assignments passively and has no say in choosing them. The series blends a semi-realistic cinematic style with slightly exaggerated expressions, fusing time travel, system-flow, adult comedy, and dark humor. Fast-paced, with each episode standing alone yet tightly interlocking, it tells an absurd fable of a man constantly "selling himself to survive" just to live a few more days.