I said I would time

"If I could go back a year, there must have been some major disaster. It needs to be reported to the national authorities so they can prepare in advance...",Just then, with a light crack, the front door of the classroom swung open.,“I don't know either, it seems like some kind of temporal disturbance happened, affecting the location where the door opens. Wait... there's someone there, he encountered the natives of the mirror world.”。