Maoujou de Oyasumi
Sleepy Princess in the Demon Castle
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Maoujou de Oyasumi

Alternative Titles

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


Type: Manga
Volumes: Unknown
Chapters: Unknown
Status: Publishing
Published: May 11, 2016 to ?
Genres: Comedy Comedy, Fantasy Fantasy, Slice of Life Slice of Life, Supernatural Supernatural
Demographic: Shounen Shounen
Serialization: Shounen Sunday
Authors: Kumanomata, Kagiji (Story & Art)


Score: 7.941 (scored by 44364,436 users)
1 indicates a weighted score.
Ranked: #8052
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #910
Members: 16,865
Favorites: 470

External Links

Ranked #805Popularity #910Members 16,865
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In a world where humans and demons coexist, Demon Lord Tasogare holds the human empire's princess, Aurora Suya Rhys Kaymin, hostage. He demands humans to give him absolute rule on the world, but humanity refuses to concede without a fight and sends hero Yuusha Akatsuki to save the captive.

Meanwhile, although unharmed, Suya Rhys spends her time locked up in the demon castle, often feeling lethargic. Even so, she has trouble sleeping due to poor hospitality. The princess then begins her amusing adventures as she tries to make herself comfortable and finally get some sleep.

[Written by MAL Rewrite]


Maoujou de Oyasumi has been published in English as Sleepy Princess in the Demon Castle by VIZ Media under the Shonen Sunday imprint since June 12, 2018.

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More reviewsReviews

Dec 6, 2016
Preliminary (30/? chp)
This is a manga where the captured princess is not the damsel in distress. She does what she likes and will do what ever it takes to achieve a good nights sleep. This usually causes trouble for the demons as they have to clean up the mess she has caused.

What about the hero party coming to her rescue? Does the princess even care? The answer is nope. She just wants to sleep.

Every chapter we are presented with a new revolutionary ingenious idea the princess came up to with enhance the quality of her sleep. This involves the theft of items around the castle ...
Nov 21, 2019
Preliminary (142/? chp)
I'm gonna do my best to review this manga with as little bias as possible...which may be difficult. So what is Sleepy Princess in a Demon Castle about you might ask?'s about a Sleepy Princess in a Demon Castle, what you mean? The name literally sums up the synopsis of this whole series. A Princess get's kidnapped by Demon's, and all she wants to do with her time is...find the most random and idiotic ways to help her get to sleep? Hm, interesting...seems like a synopsis like that would get pretty old after a while...heh, you'd think so anyway, but it doesn't. Let's dive ...
Mar 28, 2018
Preliminary (57/? chp)
I love this manga. Just so funny and adorable while also somehow managing to have a horror side it.

The Princess is great in this. Just how oblivious she is to the stuff around her is great. I do kind of wish she had a bit more common sense. But oh well.

I do like how the princess has pretty much made everyone in the Demon Kingdom a subject to her. Like how in the human world everyone adores her and in this everyone really dislikes it when she's gone and it's quite.

I'm glad they're taking the piss out of the ' Hero" I normally ...

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Poll: Maoujou de Oyasumi Chapter 296 Discussion
Kuma - Sep 11
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Sep 25, 5:54 AM
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ReaperCreeper - Sep 11
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Kuma - Aug 12
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Xenocrisi - Jul 2, 2016
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Poll: Maoujou de Oyasumi Chapter 293 Discussion
Atavistic - Aug 8
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