Monogatari Series: Off & Monster Season - Zankoku Douwa: Utsukushi-hime

Episode 6.5 of Monogatari Series: Off & Monster Season, adapting the short story "Utsukushi-hime/The Princess Beauty"
Once upon a time, there was a true story that happened about 600 years ago. It's a story of a very beautiful girl who lived in a country that no longer exists.

(Source: Crunchyroll)