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...
So, why would the absolute reigning 
champion of Noto fight incognito?!
لِمَ قد يقاتل حامل اللّقب المطلق 
في نوتو متخفّيًّا؟
Und warum versteckst du dein Gesicht,
wenn du der Champion von Noto bist?
Pourquoi un champion choisirait-il
de combattre incognito ?
Por que o campeão soberano de Noto
batalhou escondendo sua identidade?
И почему действующий чемпион
Ното сражается инкогнито?