Reachmahjong.com

This game, suppoosedly is about helping you to get if you gonna get ronned. Or something like this says it´s description, I´m sleepy now.

The game is 麻雀　ロン牌当てクイズ　「ロン破」.

https://play.google.com/store/apps/deta ... jongronpai

I cannot download it as it´s not a region free app.