A 2006 mahjong manga by Kobayashi Ritz, serialized in Square Enix's Young Gangan, and adapted into a 2009 anime by Gonzo.
The franchise is well known for having lots of yuri subtext and girl pairings, as well as the busts of most of the female cast steadily ballooning into gigantic breasts over the course of the story.
A spinoff, entitled Saki: Achiga-hen episode of side A, started serialization in 2011, which was adapted into an anime in 2012.
