HANAYAKA NARI, WAGA ICHIZOKU: KINETOGRAPH

Set during Japan's Taishou era (1912-1926), a girl named Haru Asagi works as a maid of the Miyanomori family, which is headed by one of Japan's most powerful magnates. However, the family head suddenly announces that he is retiring, so one of his six sons must assume control of the family. — Description from AniList community (anilist.co).