Transfer student Takisawa Noboru quickly learns that all disputes at his new school are settled in the boxing ring. Now he finds himself in a series of showdowns with the local top dog, Ibuki Saburo, for the love and respect of the beautiful Yukari. (Source: ANN)

Constantly outperformed by the girls' club, the boys' soft tennis club faces disbandment due to their poor skills and lack of positive results in matches. In desperate need of members, Touma Shinjou is looking to recruit capable players, but he fails to scout anyone. Enter Maki Katsuragi, a new transfer student who demonstrates great reflexes when he catches a stray cat in his classroom, instantly capturing Touma's attention. With his interest piqued, Touma ambitiously asks Maki to join the boys' team but is quickly rejected, as Maki doesn't wish to join any clubs. Touma refuses to back down and ends up persuading Maki—only under the condition that Touma will pay him for his participation and cover other club expenses. Maki joins the team, and his incredible form and quick learning allow him to immediately outshine the rest of the team. Although this gives rise to conflict among the boys, Maki challenges and pushes his fellow team members to not only keep up with his seemingly natural talent, but also drive them to devote themselves to the game they once neglected. As the members of the boys' soft tennis club discover their own capabilities, they endure personal hardships and deal with the darker side of growing up in middle school.

As the younger brother of Japanese soccer star Seisuke Kanou, Kyousuke was always expected to grow as a soccer player at the same pace his brother did—an expectation that proved too difficult to meet. Having fallen behind, he now lives in the shadow of his brother's success. Entering his freshman year at Jouyou Akanegaoka High School, Kyousuke vows never to play soccer again. However, Miki Tsujiwaki, the captain of the girls' soccer team, and Mori Kazuto, the manager of the boys' team, recognize Kyousuke's potential and want to see his return to the game for their own reasons. With an opportunity to play soccer again, Kyousuke must either remain steadfast in his decision to abandon the sport he once loved, or allow himself to reignite that flame to become the best striker in the world.

During a race, mountain bike (MTB) enthusiast Shou Yamato is mysteriously dragged into another world alongside his friends, Kakeru and Makoto. Soon, the group discovers that this world known as X-Zone revolves around Idaten battles—MTB races characterized by special courses, rules, and hidden powers lying dormant within the bikes. The only way to return home is to win and obtain the MTB emblems from the defeated challengers. Despite being perplexed and terrified of the bizarre world, Shou is surprisingly excited. He has the opportunity to compete with fellow MTB riders, make new friends and rivals, and also unearth the X-Zone's hidden truths that may dramatically change his fate. Shou and his friends must make it through an arduous journey, one rife with conspiracies against them, in order to safely return home together.