In the year 3000, mankind confirmed through "space-time string theory" that all space and time are not linearly connected in series, but parallel universes that exist independently like quantum foam. If the "historical node figures" of each time and space die due to accidents, conspiracy, or the limitations of the times, the time and space in which they are located will fall into partial collapse (such as civilization stagnation and frequent wars). In order to repair these "regretful time and space", a group of time travelers called "Redeemers" came into being. They use "time anchors" to locate the turning point of a specific character's fate, rewrite the ending with minimal intervention, and protect the self-consistency of time and space.
