Hinomaru Ushio es un joven aficionado al sumo que se dirige hacia su nueva preparatoria, bien conocida por el gran nivel de su club de sumo. Por un incidente en el tren acaba bajándose del mismo una parada antes de su destino y se pierde, pero con un poco de paciencia encuentra su nueva escuela y a un joven luchador de sumo entrenando fuera. ¿O no es a donde quería llegar?

Llega el día en que los clubes intentan reclutar nuevos miembros y el club de sumo está decidido a conseguir ser cinco para poder participar en competencias. Entre los interesados por el sumo estará un famoso miembro del club de lucha, quien verá a Hinomaru como un rival.

La preparatoria Dachi enfrentará al famoso Bachillerato Eiga en un combate de práctica preparado por Kirihito, quien aparece para ofrecerse como supervisor del club y parece conocer a Hinomaru.

Con Kirihito como entrenador, el resto del equipo se pregunta si no va a luchar con ellos. Él quiere que sea Kei quien complete el equipo, y tiene sus motivos.

Kirihito prepara un entrenamiento especial a cada uno de los miembros del club de sumo para que estos superen sus debilidades, pero les prepara por sorpresa una visita a la Preparatoria Privada Ishigami, un lugar muy duro con un club de sumo de otro nivel.

Ushio acude a practicar al establo Shibakiyama, repleto de profesionales, y quienes al principio lo acogen con un poco de recelo al ver su tamaño, pero su maestro no tarda en reconocer su valía.

Da comienzo el inicio del torneo nacional de sumo de preparatoria con los preliminares de la prefectura de Chiba, donde los miembros del club de sumo de Odachi se preparan para mostrar lo aprendido en las últimas semanas y a darlo todo por ganar.

Dachi sigue enfrentando a los luchadores de Ishi, y en esta ocasión es el turno de Yuma y el presidente.

Llega el enfrentamiento entre los dos tesoros nacionales, el combate que decidirá si es Ishi o Dachi el equipo que gana las preliminares.

Dentro de un mismo equipo tus compañeros pueden ser tus mejores amigos, pero en el ring, pueden ser tus rivales. ¿Cómo enfrentarán a Ushio sus propios compañeros?

Los protagonistas celebran su victoria con una barbacoa y conoce a una nueva chica que se ofrece a ser su asistente. Los sentimientos de todos con respecto a los últimos acontecimientos comienzan a aflorar.

Estando ya en Nagoya, los protagonistas se preparan para disfrutar un poco de la zona antes de su duro entrenamiento, pero Hinomaru acaba practicando sumo contra alguien muy particular que parece destrozar su técnica, lo que hunde su espíritu.

Reina and Hinomaru are at former yokozuna Shunkai's dojo. He orders them to prepare curry for thirty people with 100 yen. Hinomaru and Reina try various approaches, but all fail. Training time is limited until they can find the answer, when suddenly Tenma comes to the training hall. He demands that Shunkai take him as an apprentice instead of Hinomaru. With the apprentiship on the line, their battle begins anew!

Chihiro takes Ozeki and Hori to spy on Kanazawa Kita High in order to test Ozeki's courage. Kita High's captain Aizawa refuses to pay any attention to them, criticisizing Dachi High for lacking tradition and history. Ozeki is shocked. Meanwhile, after training with Master Shibakiyama, Kei gives his opinion on what Kirihito can do to help.

Chihiro takes Ozeki and Hori to spy on Kanazawa Kita High in order to test Ozeki's courage. Kita High's captain Aizawa refuses to pay any attention to them, criticisizing Dachi High for lacking tradition and history. Ozeki is shocked. Meanwhile, after training with Master Shibakiyama, Kei gives his opinion on what Kirihito can do to help.

Shibakiyama takes Hinomaru to a clinic he trusts to treat his arm. The clinic's Dr. Kanie initially refuses, saying that urgent treatment won't help because Dachi High won't beat a powerhouse like Kanazawa Kita High. Hinomaru tells the doctor how he feels about the team and convinces Dr. Kanie to begin treatment. Meanwhile, Dachi High must face Kanazawa Kita High, the third-ranked school in the country.

Following the first day of the team tournament, Dachi High heads to thee practice area. The Ishi High team, including Sada, comes to see them. Sada suggests having Ishi High stand in for Tottori Hakuro. Meanwhile, in the individual tournament, the yet-undefeateed Kuze wages battle against the experienced reigning champion Tennoji.

Kei has been practicing the reverse, which some consider a dishonorable technique. Hinomaru fights head-on, and Kei worries that he'll stain it. Even so, he wants to get one win for the team, and faces an opponent far larger than himself. Knowing that his reverse will be anticipated, Kei unveils a new strategy.

Chihiro will face the Hakuro sumo club’s #2, Kano. Chihiro was having trouble with his powerful sumo, but then counters with his characteristic fighting sense. But being cornered brings out Kano’s fighting spirit and he grabs Chihiro’s belt with both hands!

In the match against Hakuro, the fifth bout is about to begin. After losing to Kuze, Tennoji thinks of himself as a challenger and works to live up to his teammates’ expectations and become a yokozuna again. Hinomaru, supported by his teammates and the other high school teams that have helped him, rises to the challenge. Having both lost bouts, their battle begins with the contenders anticipating each other’s moves and the advantage trading sides.

Kirihito enters the sumo ring. He’s supported the team as a trainer, but shouldering the injured Kei’s strong emotions, he now rises as a competitor. He uses numerous techniques against Eiga High’s Sawai, but the opponent’s skill draws out the bout beyond Kirihito’s twenty-second limit.

It’s the fourth bout of the Inter-High team championship. Though they were born and raised completely differently, Daniel and Ozeki both joined sumo due to their admiration for yokozuna Yamatokuni. They challenge each other’s love of sumo head-on. Then the fifth bout. The greatest sumo rivalry, Hinomaru and Kuze, is about to ignite.

Kuze and Hinomaru are evenly matched in battle. Kuze practiced sumo in isolation from a young age, while Hinomaru’s physique was a handicap he had to overcome. Through the battle, they acknowledge each other’s strength, and give all of themselves to achieve victory.