Maou Gakuen no Hangyakusha: Jinrui Hatsu no Maou Kouho, Kenzoku Shoujo to Ouza wo Mezashite Nariagaru

To demons, humans are nothing more than livestock. Morioka Yuuto, an ordinary high school boy, is suddenly chosen as a candidate for the next Demon King. Enrolled at Ginsei Academy—a school for demons—he is met with nothing but contempt from his fellow students. That all changes when he crosses paths with Himekami Rizeru, a beautiful demon girl who makes him an unexpected offer: "I will make you the Demon King. In return… make me your kin." From that moment on, Yuuto's world is turned upside down.