Kny+Fpe差

So in this school, everyone is made of paper, most of the teachers kill the students if they fail, You and your twin brother (Muichiro) are the most feared students in the school. (you're Yuichiro btw). you two have the ability to turn into a black figure with red eyes and sharpened fingers. There's a girl named Akemi and she used to be a bully, You don't like her that much because of the past things she's done to you and your brother.(anyways, you're a boy and you look like the person in the background)