Saki

Synopsis

The mahjong club goes to a mountain retreat for mahjong training camp, spending the first day having fun. The next day, Hisa puts each of the players through special regimes, having Saki learn how to play mahjong online whilst training Nodoka to work with actual tiles and Yuki works with her math skills. As the players put their training to practice, Hisa explains how she was once the sole member of the mahjong club, patiently waiting until new members joined her. The next day, Yūki, Nodoka and Saki go to see the nearby waterfall.

(Source: Wikipedia)