白虎隊　志士異聞記

The protagonist Chisato and her Kendo instructor older brother Chitose are ordered to attend the Aizu clan school Nisshin house.

Boys attending is usual but there is opposition to a girl attending the Nisshin house, but Chisato deepens her friendship with her childhood friend Mineji, the cheerful Matahachi, the serious Gisaburou, and the gunnery instructor Towako.

Then the protagonist meets Koutarou, who owns a fine clothing shop in the castle town, and Narihira, a mysterious youth. A hint of war approaches, and the brief peace continues.