Yuni Kuroba

Yuni Kuroba is a first-year student at Seiin High School and a member of the boys' volleyball team who serves as an outside hitter and their ace

Yuni is a semi-cheerful boy. He becomes passionate about volleyball, wanting to be the ace of the team. According to his cousin, he gets too cocky when he gets complimented

Yuni and Hajima used to be childhood friends before Hajima moved away to Tokyo. During middle school, Hajima moves back and reunites with Yuni.