MONOGATARI SERIES: OFF & MONSTER SEASON - A CRUEL FAIRY TALE: THE BEAUTIFUL PRINCESS

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) — Description from AniList community (anilist.co).