NMB48のカジュアルパーティー is a free game app developed by StuDeepl Inc for iPhone users. It is a game that allows you to play mahjong and Old Maid with members of the NMB48 idol group.

One of the main features of the game is that you can nurture your favorite idol member card through mahjong and Old Maid games. As the idol member card grows, the card image changes. The app is designed for intuitive gameplay, with easy-to-use controls and idol member guides that even beginners can enjoy.

The game also offers online multiplayer matches where you can play against other players or even members of the idol group. By playing online, you can participate in ranking events and earn rewards like limited edition cards and coins.

It is worth noting that the game offers a Gold Pass, a monthly subscription that provides automatic heart recovery every 30 minutes. The Gold Pass costs 480 yen per month and can be purchased through iTunes. The subscription will automatically renew, but can be canceled at any time.

Overall, NMB48のカジュアルパーティー is a fun game for fans of the NMB48 idol group who enjoy mahjong and Old Maid games.