Yes, this is a crossover Yugioh and Cardfight! Vanguard story. However, this is 90% a Yugioh story simply because that's the card game they play in this. Only CFV parts are the characters. CFV Characters in this are just Aichi and Kai. Takes place after the ending of Yugioh GX, and after Link Joker Arc (Season 3 of CFV).