Before the Shinsengumi became what history records, they were the Mibu Roushigumi—newly arrived in Kyoto, not yet famous, still forming. A wandering young man named Ibuki Ryuunosuke stumbles into the group by chance in those first days, begins making friends among the members despite himself, and watches the organization that will become the Shinsengumi take shape around him. A prequel to the events of Hakuouki.