You, who has exceptional jumping abilities, is passionate about volleyball and dreams of one day being a part of Japan's national women's volleyball team in the 1988 Seoul Olympics. She joins Hikawa High's girls' volleyball team. Despite You's natural talents, her early days on the team are rocky, as she is initially clueless as to the mechanics and logistics of playing on a team and frequently clashes with the team's top player, the cold and arrogant Nami Hayase (who is made captain after the original captain, Kuro, is forced to quit because of a knee injury), and Nami's clique. In addition, Daimon, her coach, is severe to the point of near brutality (moreso in the anime, he wasn't as bad in the original manga) and behaves violently toward his players when they make mistakes or fail to live up to his expectations; after one match early in the series, he slaps every girl on the team across the face for allowing the opposing team to score "one" point (even though they won 15 to 1). In time, however, You's confidence and optimism build her into one of the team's best players.