Yashahime: Princess Half-Demon (2020)

S1E30 Hisui the Demon Slayer

Setsuna finds herself abducted by Princess Aiya, the deputy shogun's daughter. Eager to avoid her lessons, Princess Aiya pleads with Setsuna to act as her body double for a day. However, things take a twist when her newly appointed tutor is revealed to be Hisui, disguised as his elder sister Kin’u!