After an accident during the Interhigh, Hinata Shouyou, a girl as cheerful as the sun, has no other option but to leave the female voleyball team for two months. As she became depressed, her coach encourages her to become a temporal manager for the male team in order to clear her head. There she will make strong bonds with everyone, especially with the stoic Kageyama Tobio, who teaches her what he can and also learns from her: will it evolve into something more than friendship?