It Is Impossible to Protect the Protagonist

Two worlds in different dimensions originally had no intersection, but one day it was broken. Purple cracks are everywhere, monsters from the abyss, hopeless revenge, until... "Congratulations to the host for completing the mission, now go to the final world! Please don't overload the host!" "???" "Because the host is overloaded, it is looking for a carrier again. Start the ultimate mission to protect the protagonist!"