Flightless - Yandere!Karasuno x Male Reader fanfic

When y/n Oikawa moves up into high school, he's finally ready to step out of his brothers shadow and become the best Spiker there is. On his first day at Karasuno High, he encounters the men's volleyball team, and they instantly take him in! Although y/n's main goal is to excel in volleyball, it seems that over time...