
S01E01 Go With the Flow, Part 1
In Heartland, Yuma Tsukumo aspires to be the world's best Duelist. Despite this, he is not a good Duelist. When he ends up Dueling, Shark, a student known to have pro-level skills, odd things begin...
After his Duel with Shark, Yuma Duels Tetsuo Takeda without "Numbers" and loses twenty times in a row, with Tetsuo angry because Yuma lied about not using the "Numbers" against Shark. Yuma is scolded by Astral on his immaturity. On the other hand, Shark returns to "his place" where he gets involved in criminal company. Yuma, who knew what was going on with Shark, challenges the two strongest thugs: Rikuo and Kaio, to what Shark proposes to be a 2 on 2 "Tag-Team Duel".
When aspiring duelist Yuma meets Astral, a mysterious visitor from another universe, it seems like destiny. Yuma needs Astral to teach him how to duel, and Astral needs Yuma to help him regain his memories!