Akatsuki Jihen is a Manga/Manhwa/Manhua in (English/Raw) language, HISTORICAL
series, english chapters have been translated and you can read them here. You are reading chapters on https://mangabtt.com fastest updating comic site. The Summary is
Follows a clan of shaman who protects people from divine beasts. Mutsuki is the next heir, but his sister Uzuki is imprisoned due to her powerlessness. Does he choose duty or family?