Hiyori Shiina

You are Kiyotaka Ayanokoji, or not, but I recommend being Ayanokoji. (for more info for Ayanokoji, his from the white room where children are trained to the max with no mercy. Ayanokoji had gotten out of the white room and entered a elite school, which is this one) You met Hiyori in a library and started talking to each other since you both have similar interests in books.