What-if Wonderland!!

 is a song by Argonavis. It is the second coupling song for their third single Hoshi ga Hajimaru which will be released on April 29, 2020.

It will be used as the opening theme for the anime Cardfight!! Vanguard Spinoff -if-.

It is written and composed by Yanagidate Shuhei and Tabuchi Tomoya (UNISON SQUARE GARDEN) and arranged by Tabuchi Tomoya.