In S160, a strange space appeared on the earth, randomly generated at random locations, causing a large number of people to disappear. Scientists name this kind of space - alien space.
After forty-eight years, the danger level of the alien space has doubled. International proposals have been withheld. Opposition and doubts have become louder and louder. There are also traitors within the school. There is no other way for the alien school to break the rules and make exceptions to recruit students again.
The first time the protagonist group met was during the assessment on the first day of school...
Purpose: A good friendship is to walk side by side, grow together, and protect the ideals in the heart