It's classic kakegurui. Some of the gambles were not as well designed as those in kakegurui imo, but it still follows the same kind of format, same suspense, same satisfaction at watching these girls overturn seemingly impossible odds. Plus, mary best girl. If you enjoyed the main anime series, and want more of the same taste, then you'll get it here. i would say most of the side characters are quite one-dimension, it has your typical submissive "i-would-give-my-life-to-you" sidekick, but for me it was worth it just to see mary prevail and outwit those that went against her. it was great to see her getto where she was in kakegurui.