Maou-jou de Oyasumi

Sleepy Princess in the Demon Castle

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Alternative Titles

Synonyms: Sleeping in Devil's Castle
Japanese: 魔王城でおやすみ
English: Sleepy Princess in the Demon Castle
German: Sleepy Princess in the Demon Castle
French: Sleepy Princess in the Demon Castle
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Oct 6, 2020 to Dec 22, 2020
Premiered: Fall 2020
Broadcast: Tuesdays at 02:00 (JST)
Producers: Lantis
Licensors: Funimation
Studios: Doga Kobo
Source: Manga
Genres: ComedyComedy, FantasyFantasy
Theme: MythologyMythology
Demographic: ShounenShounen
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.981 (scored by 9021590,215 users)
1 indicates a weighted score.
Ranked: #6122
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #1124
Members: 196,775
Favorites: 2,128

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Ranked #612Popularity #1124Members 196,775
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The Demon Lord Tasogare's castle is a dark and frightening place, filled to the brim with various monsters. Any soul unfortunate enough to be imprisoned here is sure to be terrified by the horrors within. However, the human princess Aurora Suya Rhys "Syalis" Kaymin is a different case. Rather indifferent to her situation, Syalis worries about one thing and one thing only—sleep. Ever since the demon lord kidnapped her from her kingdom, she has not had a single good night's rest.

To alleviate her dozen dozing issues, the princess makes do with what she can find in the castle. Whether it be the fur of fluffy demonic teddy bears or the silky, blanket-like bodies of ghost shrouds, everything is but a means to ensure a peaceful slumber. With so many potential materials to craft items that can help her sleep at her disposal, nothing will stop the sleepy princess—not even death.

[Written by MAL Rewrite]


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Episode Videos

Related Anime

Characters & Voice Actors


Cook, Justin
Kamata, Hajime
Iizuka, Aya
Wada, Kaoru


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Kaimin! Anmin! Suya Rhyst Seikatsu (快眠!安眠!スヤリスト生活)" by Aurora Suya Rhys Kaymin (Inori Minase)

Ending Theme

"Gimmme!" by ORESAMA

Dec 22, 2020
'If you got kidnapped and imprisoned by the demons, what should you do?'

Well obviously in this situation, you will always try to find a way to escape from their prisoner. But for this anime, Princess Syalis is the most unique one. She rather sleeps in her prison bed despite the panicking situation that is happening in her homeland.

But there's one problem! The demons only give her nothing but a low quality bed sheet and pillow. Dissatisfied, Hime-sama decides to go out and create the best quality for her to sleep even if it means murdering demons and destroying useful items. What makes the story even ...
Dec 21, 2020
(Quiet please, our princess is sleeping right now)

How far would you go for THE perfect sleep? It has been scientifically proven that a good sleep is very important for our body, but how can we achieve that? This is the most important thought of our princess Aurora Suya Rhys (or let's just say Suyaaaaa~), she goes all out to get this achievement.

In a time when humans and demons were still hostile, our princess was captured by the demon king Tasogare. He locked her up and just gave her an old mattress and sheet to sleep on. How is our princess supposed to have a restful ...
Dec 21, 2020
‘I love sleep. My life has the tendency to fall apart when I am awake, you know?’

Once upon a time, people lived happily in the kingdom of Sleepland. A jealous demon king appeared, wishing to destroy the kingdom. He kidnapped the princess and said, ‘I am kidnapping your Princess and if she is dear to you, you will give all your lands to the demons.’ So, just like in any typical fairy tale: an evil and insidious demon king, in order to show these mongrels, who are called humans, who the real king is, kidnaps a young maiden and imprisons her in a cell in ...

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