Bishoujo Janshi Pretty Sailor 18-kin
A mahjongg game involving look-alikes of the Sailormoon characters. You play the Usagi look-alike, challenging the others to games of mahjongg. By claiming a successful mahjongg, you can then force your opponent into humiliating penalties, which can involve stripping, playing with herself, masturbation, or even bondage. Running out of funds simply means Usagi takes her top off. After every successful round, you accumulate power points in a match-the-picture game. Three rounds won moves you on to the next wannabe Sailorsenshi.
Not-Usagi is happy you chose to continue!