The story focuses on the life of Gou, a wife of the second Tokugawa shogun Hidetada. Gou was the third daughter of the daimyo Azai Nagamasa, who was married to the sister of Oda Nobunaga. One of Gou's older sisters was the wife of Toyotomi Hideyoshi, while the other married the daimyo Kyogoku Takatsugu.
The art is good. The author keeps the story simple, doesn't go too deep into the minor characters' backgrounds and sticks to only giving the necessary details which is a very good thing in a historical story with several concurrent episodes taking place.
Gou is the story of Oeyo, niece of Oda Nobunaga. The manga traces her life and the various upheavals she has to go through (including three political marriages), as she becomes an unwilling pawn of Hideyoshi.
It's a 5 volumes series and while the initial books are okay enough, the story becomes more interesting later on with several new characters and political conflicts. It does gloss over private details of certain characters but those details are hardly relevant to the plot.