Yukimura Chizuru arrives in Kyoto from Edo searching for her missing father and is caught in a night attack that draws the Shinsengumi to her side. Vice Commander Hijikata Toshizo takes her in as the group investigates the Rasetsu, demon-strength warriors created by an elixir called ochimizu, tracing the trail back toward her father's research. This manga adapts the Hakuouki otome game.