Jeff The Killer

i read this manga a long time ago and i forgot the title. It was about a girl that wanted the perfect man. There was a dude called the white prince and he had a best friend called black demon. And then when she went back home her parents said that she will start moving into the dorms there. When she gets there this guy threw some gum in the black demons hair. And the black demon grabs him but the girl protects the guy who threw the gum in the black demons hair. Then she grabs some scissors and cuts off his shoulder length hair. Then when they meet at school he kisses after he saved her from some stupid bully that reminded her of her past. Yep thats all i remember and i forgot the fucking name. grr...i wanna kill myself.