Sho liked MTB very much and he always practiced at the practice field, “X-Zone”, with his friends, Takumi and Makoto. Takumi was a good mechanic and Makoto was a competitive girl rider. One day, he was challenged by a MTB team, “Shark Tooth”, of Samejima brothers’ betting the X-Zone. For Sho, X-Zone was a memorable place where he had spent days with his dead father, and he couldn’t lose the game. The day came, and during the race with the leader of Shark Tooth, black smoke suddenly covered around, and they were sent to another world. When he came to, he found Kakeru, Makoto, and his MTB, “Flame Caesar”, were also there. While they were wondering what had happened, MTB riders came. They challenged Sho to a MTB bout. They said Sho had to collect 10 pieces of emblems by winning MTB bout, “Idaten Battle”. This is how Sho came down to compete in Idaten Battle at various courses, such as, volcanos, ruins, deserts, snowy montains, and grave yards. Whether will show win the race to come back to his world?

As a young child, Aizawa Yuuichi had often visited his cousin in the city; however, something drastic happened to keep him away for seven long years. Now, Yuuichi returns, his memories of those days are simply gone. Settling into the wintry town, Yuuichi comes across several young girls, all of whom are connected to his past. As he befriends them and continues to interact with them, the long forgotten memories from his childhood begin to resurface... [Written by MAL Rewrite]

The franchise's story is set in a world over a decade after futsal has skyrocketed in global popularity. Protagonist Haru Yamato watches the championship of the U-18 world cup and is inspired by a Japanese player named Tokinari Tenōji. He joins the Koyo Academy High School's futsal team with the goal of becoming a player like Tenōji. There, he finds friends, and together they face their rivals.

With their school's pool opening the next day, Iria schemes up the idea to hold a swimsuit contest. With Lisara, Mina, Quele, and Iria herself all participating in the event.