Yashahime: Princess Half-Demon - The Second Act ‒ Episode 6

By most measures, this is a Hisui episode, because he's been duped into being the etiquette teacher in his older sister Kin'u's stead.

source https://www.animenewsnetwork.com/review/yashahime-princess-half-demon-the-second-act/episode-6/.179300