Honnouji no Musume: Sengoku Ichi Fukou na Hime ni Tensei Shimashita

Kei is a rookie actress involved in an accident on set during a filming of a period drama. When she wakes up, she realizes she has been transported to the actual Warring States period as the daughter of Akechi Mitsuhide.

(Source: natalie.mu, translated)