When fighting a curse, it creates a giant tear in reality that dumps in a few students from MHA, and also turns the teachers of jujutsu high back to their teenage selves- and brings Suguru Geto back to life.
During a fight with a curse, Y/N and the other first-years encounter a warp in reality that brings them some new and chaotic friends from the world of Chainsaw Man :) (Canon compliant +csm)
Y/N doesnโt remember anything, just waking up on a beach surrounded by strange people with the last thing they remember being walking into a school. Now theyโre told that the only way to leave this strange place called Jabberwock Island is to kill someone- and get away with it.