The Super Secret Number Cards Investigation Club face their greatest challenge yet! The members are in turmoil over who will be their Female Mascot, refusing to talk or even look at each other! Unsure of what to do, Yuma looks for a way out along with Rei. At that moment, Gilag hides his identity and appears before Yuma with a suggestion, plotting to steal the "Numbers" from Yuma and Shark. Yuma does as Gilag says, calling out to Shark in order to host a Sports Duel Tournament!