Story follows high school student Saki Miyanaga and her classmates as they become absorbed in the game of mahjong. They target an upcoming national competition.

Yuri Kashiwaga was once known as a genius pianist. One day, she returns to her hometown in Goto Islands from Tokyo. There, she begins to work as a temporary teacher…

Long ago, Japan was home to several navies. The Murakami Navy, said to be the strongest of them all, once defeated even Nobunaga, and refused to join Hideyoshi, choosing to…