Fever
The fourth round begins off slow with Nodoka winning a small hand, and as play continues, the players continuously keep on getting draws. Eventually, Nodoka is able to get more into the game, and ups her skills like when she is playing online. By the time of the last hand of the first half of the round, only Nodoka has won any hands and has pulled ahead of the other three.
Aired 29/06/2009EP 13 - Fever

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)