Why Him? {brother!Oikawa x Reader x Kageyama}

(Y/N)'s last few months of junior high were nothing more than a disappointment. Her first few months at Karasuno were no different. With a dysfunctional team, an emotionally unavailable boy, and a childish older brother (bonus points since the boy and the brother despise each other) (Y/N) can't seem to catch a break...