After the two lived happily in the original world for a period of time, they died due to some reasons and were selected by the system. They traveled to 4 worlds, lost their memories, fell in love and died together, restored their memories before death, and died completely in the last world and returned to the original world. (The characters in the book are all my own OCs. Please forgive me if there are any duplicate names.)
Intention: The two of them can live peacefully in various worlds and be at ease wherever they go.