Yume Tenshi ~Takujou Dennou Inmu Yuugi~

Two girls greet you in an entertainment place. They explain the place to you and ask you to pick one of 12 girls to play a virtual situation. To finish each situation, you need to win four majong games or rich-man card games with the girl. If you manage to get all 12 girls, those two will challenge you.

[From Li's Fun House]