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Kinta Tokumaru is a young swimmer who wants to join the prestigious Ochiai High School swimming club. However, on his way to the club, he is caught up in Ultra's wild behavior and realizes that the team doesn't even practice. Frustrated, Kinta challenges Ultra to a match in order to train together, but is defeated by Ultra's swimming ability. Kinta is at a loss, but he learns that the swimming club's activities have only been suspended, and all the members have a strong passion for swimming. At that moment, Ultra, who had seen through Kinta's qualities, invites him with a promise: "Let's go to the Olympics together."
Tochino Arashi, who is treated as a heel sumo wrestler due to his arrogant personality, continues to win consecutive victories and is finally promoted to yokozuna. However, that night, he suddenly switches with a boy named Makoto Akagi, who threw himself off the bridge because of the bullying. Although Tochino has become frail, he learns the joy of confronting a formidable opponent by being hit by the rough seas of the Hanayama High School, where Makoto used to go to.
The sequel to Fukujirou Yokoi's famous series *Fushigi na Kuni Puchar*. After Yokoi's untimely death from tuberculosis in 1948, the series was completed by Tetsuo Ogawa.
