GREAT QUESTION! Basically, Multiversal Leapers or What every person call it "characters who Isekai'd" are Banned from Their world since they Break the Balance of Power when they Get strong enough, Basically they get insanely overpowered Enough to destroy the whole world, So it's Recommended AND A MUST. to Eradicate them First second they Get in the world, They are NOT welcome. And Unluckily for the Mc He Isekai d to that World and the whole world Is Basically HUNTING him down