Beginning Author's Note

Akiyama Katsumi is an ex-volleyball player who quit the game after being constantly shut down on the court and losing joy for the sport, until one day when she goes and watches Oikawa Tooru's last middle school game. With a reignited passion for the sport and a new mentor, Katsumi is determined to learn what it takes to gain someone's perfect trust on the court.

(I don't own Haikyuu or its characters)