In the city, a group of people with special powers (called CS) were gathered together to form CST. Overtly, they were ordinary people who could disappear when they blended in with the crowd, but secretly, they were X people with extraordinary lives. There are also levels in CST, "Yuan". The "old level" refers to the people who first created CST, or those whose abilities are absolutely rare. The following are "souls" that are made into special functions after death. The production success rate is less than 8.4%. The rest are human CS, who have not completely escaped from the world.
In CST, there are sensors, time controllers, memories, etc. They are responsible for their own tasks. It is already strange enough, but things still happen that you can't expect...