Not him again (one direction fanfic)

Cat Green grew up in Cheshire, England. Her life was good until she started high school, then it turned into a living hell. Why you might ask, because of him. He bullied her, both physically an mentally, he being Harry Styles. But He was not the same Harry millions of girls swoon over, back. then he was different. For some reason he hated Cat, why, even he doesn't know. But every day he would torment her and everyone followed his lead. But then he left to fallow his dreams and never came back. So what happens when these two people meet again?