Sleepy Princess in the Demon Castle (Japanese: 魔王城でおやすみ, Hepburn: Maōjō de Oyasumi; lit. 'Good Night at the Demon King's Castle') is a Japanese manga series written and illustrated by Kagiji Kumanomata.. Watch Sleepy Princess in the Demon Castle (English Dub) Sleeping Princess of the Demon Castle, on Crunchyroll. Despite living as a captive in the Demon Realm, the princess writes a letter to Santa.
Community Creation Sleepy Princess in the Demon Castle is a Japanese fantasy comedy manga series, written and illustrated by Kagiji Kumanomata, that follows a captured princess's relentless quest for a good night's sleep inside the castle of her captors.. Sleepy Princess in the Demon Castle (魔王城でおやすみ, Maō-jō de Oyasumi) is an anime TV series based on the manga of same name by Kagiji Umanomata. The anime was announced in the 42nd 2019 issue of Weekly Shonen Sunday, and it premiered on October 6, 2020.