"VF" means to battle with the card game "Vanguard", in other words, to "fight". The criminal's demand is to call the strongest adult vanguard fighter, and to fight him against three games.

Vanguard (TV 2018) as Katsumi Morikawa Cardfight!! Vanguard G GIRS Crisis (TV) as Katsumi Morikawa (ep 14) Cardfight!! Vanguard G NEXT (TV) as Katsumi Morikawa (ep 26) Cardfight!! Vanguard Gaiden ...