At the school Gao goes to, cases of people having their decks stolen starts to happen. As a Young Buddy Cop, Gao goes there to investigate, but he's led to a fighting stage in a different dimension by a dark power. A mysterious Buddyfighter named ‘Death Shido’ has the Hundred Demon, ‘Ice Prison Emperor, Cocytus Greed’ as his Buddy. He challenges Gao to a fight.