In the world of professional mahjong, RIO and ゆい are idol-like in their popularity. Of course, both are serious powerhouses. The unstoppable duo hears a rumor. A high-stakes underground mahjong game is held after hours at a personal gym in Tokyo… Even in the pro world, they have rivals. They've prepared 10 million yen and now it's time to settle the score… 【We are streaming unreleased footage added to the amateur floor number INSTC-703.】
