In 2014 AD, cosmic observers discovered a parallel world. After six years of research, they finally figured out how to enter the parallel world. On November 17, 2020, after numerous screenings, it was finally decided that four experimenters would conduct the first parallel world travel operation, codenamed-aespa. After the four members traveled to a parallel world, they turned back and were attacked by a giant black snake. The seriously injured captain Katarina was found by team member Winter. Their team member Giselle and team member Ning completely lost contact. K and W helped each other out of the small desert, only to find that all humans in this world seemed to have disappeared...
Intention: How to continue human civilization in the end of the world