3화: 카츠키가 유유를 먼저 물리쳐야 하는 단지와 맞서다
2021년 4월 17일 방영
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)