Yorimichi has played with Yuni since he was a baby. When he was younger, he wanted to become good at shogi and often went over to his grandfather's house to get lessons. He would also sometimes watch over and play with Kimichika Haijima and Yuni when they were little. As he got older, he became a delinquent and subsequently got abandoned as a lost cause by his relatives, but Yuni knew he had his good points and continued to hang out with him, even when he knew Yorimichi was sponging money off of him.

High school student Kimichika Haijima moves back to his hometown, Fukui, after causing trouble in the Tokyo Junior High School volleyball club. There, he is reunited with his childhood friend, Yunii Kuroba, who possesses outstanding physical abilities, but is vulnerable under pressure. Haijima, with his overwhelming passion and talent for volleyball, forms an ace combination with Kuroba. 

The two enroll at Seiin High School, where they join the volleyball club. Awaiting them are the 163 cm hot-blooded captain Shinichirou Oda, the talented and sharp-tongued vice-captain Misao Aoki and his third-year pair, and second-year students, including Akito Kanno, who is always wearing long sleeves due to his allergy to sunlight. 

The newborn team breaks its former shell of weakness and becomes Fukui's rising star. This is a certain team's journey to victory, with a series of fascinating rivals standing in their way.

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The story centers on Kimichika Haijima, who got into some serious trouble on his middle school volleyball team, and as a result transferred from Tokyo to Fukui prefecture, where he again met with his childhood friend, Yuni Kuroba. Yuni has overwhelming talent at volleyball but is weak to pressure, but together with Kimichika they become the ace combo of their team. But the two have a fight at the final prefecture tournament in middle school. Now in high school at Seiin High School, Kimichika and Yuni have severed their relationship, but both join the volleyball club. Along with the second-year and third-year students in the club, they work to make Seiin High School's volleyball club a rising star in Fukui prefecture.
 
(Source: Anime News Network)

Yorimichi Kuroba