The characteristic of fast travel is that each small copy is fast-paced and does not have detailed descriptions, but it has many reversals and does not drag on.
A catastrophe occurred when the earth was absorbed by a magic weapon from a higher immortality plane. The remaining people on earth had their memories erased and became civilians. The protagonist retains his memory only if he has a system. From then on, he does the fast-travel mission and upgrades, just to make the earth independent. There are many touching stories in Little Mission, which is very beautiful.
The plot of each dungeon is short and concise, the various twists and turns are quite interesting, and the one with the interstellar background is even better.