In the world of Cardfighting, a tale of a regular middle schooler named Chrono Shindou unfolds. Despite his intimidating appearance, he possesses a gentle spirit that endears him to children. One fateful day, Chrono stumbles upon a mysterious Cardfight deck, the Gear Chronicle, hidden in his locker. Curiosity piqued, he ventures to Card Capital 2, where he encounters the experienced player Kamui Katsuragi. Under Kamui's guidance, Chrono delves into the game, embarking on a journey that leads him to forge lasting bonds and friendly rivalries. Among his newfound companions are Shion Kiba and Tokoha Anjou, who join him on his quest for camaraderie and excitement.