第 3 集: 勝己挑戰丹治，後者須在對決前擊敗優優
2021年4月17日 播出
The mysterious challenger Katsuki defeats Megumi and challenges Danji to a match, but Danji has a condition: to defeat Yu-yu first. And that's how Yu-yu started his special training with Danji for the cardfight one week later... (Source: Funimation)