When Harry opened his eyes for the first time, he blinked up owlishly at Louis. Louis could see the little gears in Harry's brain working overtime but failing uselessly. He was suddenly aware that the boys hadn't said a word since he straddled Harry's lap. In fact, they were looking at the sight of him like he was a creature from another dimension. "What?" Louis snapped aggravatingly. "Louis," Liam started slowly, tentatively, his wide eyes blinking in increments. "Harry has amnesia." [Harry has amnesia. Louis tries to make him remember before it's too late.] Or the amnesia AU.