He took a moment to collect himself. He first glanced at his phone, then searched the web, and finally just stared blankly at the image of himself on the screen for a while, until he confirmed one thing.,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.”。