Hakuouki OVA (2021)

Chizuru Yukimura, who has come to the city of Kyoto in search of her father, has been working with the Shinsengumi since she was saved from a blood-seeking monster. Then, in June of the first year of Keio, the Shinsengumi moved to Nishi Honganji Temple to continue their patrol of Kyoto, and received reports of the frequent appearance of "bandits who assume the name of Shinsengumi. At the same time, Shinsengumi is order to protect the Shogun Iemochi who will visit Kyoto, and Hijikata and the others are in a hurry to solve the case.

Meanwhile, several rasetsu escape from the Shinsengumi post with the help of "a figure resembling Chizuru." In addition, Chizuru, who had gone to the city with Sakai, the treasurer, are drawn into the fray and goes missing. The Satsuma domain receives information of a plot to assassinate the Shogun by Tosa domain's ronin, and Kazama and the others head for Kyoto. Are the various incidents surrounding the Shinsengumi a coincidence? As everything becomes chaotic and the time until the Shogun's arrival in Kyoto approaches, Hijikata and the Shinsengumi must decide...

(Source: Crunchyroll)

Episodes:
Chapter One (第一章), November 13, 2021.
Chapter Two (第二章), December 11, 2021.
Chapter Three (第三章), January 29, 2022.