Global Time Control

The United Nations stipulates that the world implements a time control system, with time as the only unit of currency circulation. Everyone is programmed to have only thirty years of time savings at birth. Time savings are consumed when eating, seeing a doctor, buying clothes, riding a car, etc. Once they are used up, they will die. Everyone must work hard to earn time, and the time deposit cannot be zero. Our protagonist, after traveling back in time, caused the time management system to malfunction. So, his story begins.