Sherenina, a Soviet Union volleyball player, stands as a prominent rival to protagonist Kozue Ayuhara in international competitions. Their initial confrontation follows Kozue's team Fujimi securing the All-Japan championship title. In this first match, Kozue's stress and anxiety compromise her performance, resulting in her team's defeat. Post-victory, Sherenina insists on a rematch against Kozue at her peak performance, underscoring her competitive drive and commitment to a fair, challenging contest against a top-tier opponent.