Ep. 3: Katsuki challenges Danji who requires defeating Yu-yu before their match

A mysterious challenger named Katsuki defeats Megumi and issues a challenge to Danji for a cardfight. However, Danji sets a specific condition that must be met before the match can proceed: Katsuki must first defeat Yu-yu. Consequently, this requirement initiates a period of special training for Yu-yu under Danji's guidance. This intensive preparation takes place over the course of one week leading up to the scheduled confrontation. The narrative focuses on the sequence of events where the initial victory by Katsuki leads to the conditional arrangement, setting the stage for Yu-yu's development and the subsequent match dynamics involving the key participants.

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