Ws is a card game. There are about a dozen bags on sale. Flash card is a rare card in it. Flash card package is more expensive than ordinary package, but flash cards must be issued.
BanGDream, one of WS's popular war series, sells flash packages. All cards contained in the flash card package have flash card versions, and each card package must be accompanied by a special specification supplementary package of 1 flash card, which is of great collection value. The theme of this "BanGDream" flash package is "_ バンンン" Live of two bands, which includes all the membership cards of two bands at one time.