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...
Katsuki Murayama, 
making an unexpected appearance.
.موراياما كاتسكي في حضور غير متوقّع
Murayama Katsuki ist also hier.
no es otro que Katsuki Murayama.
el mismísimo Katsuki Murayama.
le champion de Noto,
Katsuki Murayama !
Veio nos fazer uma visita,
é, Murayama Katsuki?
Кацки Мураяма
собственной персоной.