S1·E20 Roots of the Problem

Yuma safely recovers "Number 96: Black Mist" from a man. Tetsuo, who witnessed the Duel, takes note that Yuma seems suddenly more brutal in his strategy, and ends up in a fight with him. Not having reconciled in over 2 days, suddenly Number 96 swallows Yuma and Astral up!! To rescue Yuma and Astral from Number 96, Tetsuo fights the Numbers for the first time!