Unable to withstand his sisters' teasing any longer, Yu-yu ran away from home and was brought to an abandoned amusement park by a member of Team Blackout. And that is also where Danji is aiming to get his 20th consecutive win, with Tohya standing in his way for that record.

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.