Shizoku Hiroka is a young girl, whose goal is to study and get good grades. When she encounters the setter from Kitagawa Daiichi (now, Karasuno), something changes in her.
Hiroka wants to learn how to socialize with other people. She also wants to learn how to play volleyball because she's inspired by that setter to play it. But doing those things was not that easy. Will Hiroka push herself out of the comfort zone and grow to become a better person?