After Ray nominates him, Yuma is chosen as the next class president, much to Caswell's dismay. The Student Council President, Carlyle Chesterton, who is under Girag's command, assigns Caswell as a "Special Disciplinary Commander", who begins enforcing harsh rules on the students. As Yuma decides he has had enough and confronts Carlyle, he challenges him to a duel, with Caswell as the referee, throwing in all sorts of rules which obstruct Yuma's dueling. Carlyle summons his Xyz Monster, Norito the Moral Leader, and deals some damage to Yuma, though he manages to find a workaround to Caswell's rules. As Caswell laments how he isn't class president anymore, Yuma reminds him of his true self, allowing him to throw away the role of disciplinary commander. Carlyle then uses Rank-Up-Magic Barian's Force to upgrade Norito into the Chaos Xyz, Saimon, the Great Moral Leader, but Yuma manages to bring out Utopia and win the duel. Afterwards, Yuma relinquishes his role as class president back to Caswell while Girag finds a new target to put under his control.