Ep. 18: Take a Chance

18

On the way to school Tetsuo is helped with an injury by Shark's little sister, Rio. Tetsuo becomes love-struck by Rio's gentleness. Yuma and the Numbers Club are in an uproar over Tetsuo's first love! At first, Tetsuo challenges Shark to a Duel in order to win her brother's permission, but he flat out declines. Remarks from Tokunosuke and Takashi lead to a huge misunderstanding, that results in the worst sibling quarrel in the history of the entire world!! (Source: Yu-Gi-Oh! Wiki)