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 Kyotaro 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.
This story has the part which was created by referencing Wikipedia, so the licence of GFDL is applied to this story.