Kuro takes Shizuno and Ako to meet her older sister, Yü, who becomes the fourth mahjong club member. The next day, Kuro asks her classmate, Arata Sagimori, a fan of Harue during her prime, and she joins as the fifth member. During the winter, Harue's company mahjong team had become defunct, leaving Harue downhearted. As she visits Achiga for some nostalgia, she is surprised to find Shizuno and the others playing. Wanting to experience the inter-high nationals once more, Harue decides to become the club's advisor and coach...