Enlightenment
The final's first round starts when Ryūmonbuchi representative Jun Inoue accidentally eats Yūki's only taco. The latter cries and causes a commotion, but Mihoko shares her lunch box with her. As the game progresses, Jun starts to win many hands and pressures Yūki who is gradually losing her confidence. Mihoko opens her right eye and uses her power to read the game's flow in order to help Yūki gain her points back from Jun. Jun gets irritated over the two teaming up against her while Yūki thinks Mihoko is her ally. However, Mihoko surprises everyone with her continuous winning, and both Jun and Yūki finally realizes that she is the true enemy. The first round ends with Mihoko completely dominating the game points for the Kazekoshi team.
Aired 01/06/2009EP 9 - Enlightenment

Saki
Miyanaga Saki is a first year high school girl whose family would get angry if she won the family mahjong games. But losing would also have its consequences. Because of this she develops a new way of playing that allows her to stay on the thin line between winning and losing, the plus/minus zero score, an almost impossible score. In a game that relies mainly on luck, the plus/minus zero score is harder than winning, but Saki can achieve this every time.
Having always hated the game, her friend from middle school, Suga Kyotoro, forces her to play in the schools mahjong club. Her developed skill and superhuman luck has made her a worthy mahjong opponent, even to the middle school's national mahjong champion.
(Source: Anime News Network, edited)