Miyanaga Saki is a high school freshman who dislikes mahjong. Since childhood, she has lost her New Year's gift money during family mahjong games. If she won, her parents would be upset; if she lost, she simply lost. Consequently, she learned to play so that her score always stays at plus/minus zero: not good enough to win, but not bad enough to lose. When we meet her, she is being dragged to her school's mahjong club by an old friend. How will a girl who hates mahjong, yet has become adept at the game due to her upbringing, survive in this environment?