Minazuki-ka no Iinazuke: Juuroku-sai no Tanjoubi, Honke no Toushu ga Mukae ni Kimashita

Rikka Minazuki, a young girl who lost her father to an unusual illness, is left without a family. Her life changes when a man arrives, claiming to be from the Minazuki family and revealing a surprising engagement between them. She had no knowledge of the arranged marriage or her father’s background. The Minazuki family is tied to a legend involving the "descendant of the celestial maiden" and the "robe of feathers." Rikka is unfamiliar with the family’s traditions and her own connection to them.