Shinemon studies for his entrance examination despite the Christmas season. However, the business of Card Capital is booming thanks to the presence of a super popular idol, Hitomi Kouzouji!? What will happen to his studies!?

Shinemon is now a 4th-year university student. He`s supposed to enter the deciding match with his teammates as representatives of Japan, but Rive starts using a new deck with a clan he has never seen before in the tournament.