What If Kyosuke Kosaka Had Saber’s Face?

My name is Kyosuke Kosaka. That's right, the guy from the novel, except my life is even more miserable than his. At home, not only does my little sister hate me, but my parents treat me like some kid they picked up off the street. My only friend, Manami, ran off with some handsome guy I don't even know. At school, Yukinoshita, the campus idol, thinks I'm a pervert, and I got suspended for beating up the classmate who slandered me. My life is truly one of a kind. Then, one day, I gained the ability to become Saber.