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...
Well, aren't you the headstrong one?
ألست العنيد هنا؟
Echt ’ne ganz schön harte Nuss!
Resistes más de lo que pensaba.
Resistes más de lo que esperaba.
T’es plutôt tenace !
Você é teimoso, hein?
Ты крепким орешком оказался.