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...
I'm sure there's another 
unforgettable night yet to come!
!أنا واثق أنّ هنالك ليلة أخرى لا تنسى في انتظارنا
Es kommt sicher eine Nacht,
die unvergesslich sein wird!
¡Llegará una noche
que no podremos olvidar!
¡Llegará una noche
que no podremos olvidar!
D’autres nuits inoubliables
comme celle-ci !
Tenho certeza de que outras
noites inesquecíveis virão!
Будет ещё одна незабываемая ночь!