Yuga, a fifth grader who attends Goha No. 7 Elementary School, is a master who invents countless roads all day long. Yuga is bored with duels managed by adults, and wants to create new rules that everyone can enjoy. One day, Rook from the next class brings rumors of a "Duel King". The place where Yuga and Rook, who are full of interest, arrive is a mysterious figure who appears in front of a meaningful stone tablet... To be recognized as the Duel King, you must win a duel within a limited time. "The road I came up with, RushDuel, must work!" The story of two boys, Yuga and Rook, changing the boring world with a new duel, is about to begin!