Saki (咲-Saki-) is an ongoing Japanese manga series written and illustrated by Ritz Kobayashi. The story revolves around a first-year high school girl named Saki Miyanaga who is brought into the competitive world of mahjong by another first-year, Nodoka Haramura. The manga has been serialized in Square Enix's Young Gangan since June 2006 and has been collected into six bound volumes in Japan. An anime adaptation by Gonzo began airing on April 6, 2009 on TV Tokyo.
Plot: Saki Miyanaga, a high school first-year student, hates mahjong because her family would always force her to play it and punish her regardless of the outcome of the game. Due to this, she learned how to keep her score at zero, neither winning nor losing. However, her friend Kyōtarō from middle school convinces her to join the school's mahjong club upon entering into high school. After the club discovers her ability, they recruit her and convince her to win instead of breaking even. She easily does so with her skill, leading the team to enter a mahjong tournament so that its members may reach the national competitions.
(source: Wikipedia)