On Neri's first day at Kokuyodani High School, she finds herself surrounded by a very odd bunch in the volleyball club. Each of her fellow first-years has their own set of peculiarities, and her sempai have the reputation of being witches. Then, the club's customary initiation ritual gets Neri's blood pumping. She sees the overwhelming force with which these witches can spike, and she wants a piece of it. Neri's entering a new chapter of her life at the high school her late sister attended, and with that, the Kokuyodani High arc begins!