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

Alternative Titles

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


Type: Manga
Volumes: Unknown
Chapters: Unknown
Status: Publishing
Published: May 11, 2016 to ?
Genres: ComedyComedy, FantasyFantasy, MagicMagic, ShounenShounen, Slice of LifeSlice of Life, SupernaturalSupernatural
Authors: Kumanomata, Kagiji (Story & Art)
Serialization: Shounen Sunday


Score: 7.751 (scored by 23212,321 users)
1 indicates a weighted score.
Ranked: #13102
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #1393
Members: 8,393
Favorites: 190
Ranked #1310Popularity #1393Members 8,393
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Sshhh! Princess Syalis is trying to get a good night's sleep. Some shut-eye. Forty winks. Catch some Z's. Long ago in olden times when people and demons lived together in—well, disharmony, really—a demon king kidnaps a human princess and imprisons her in his castle. Bereft, the princess's subjects beat their chests in anguish…until a hero arises to spearhead Project Rescue Our Princess! While waiting for her knight in shining armor, what's an imprisoned princess to do...? Teddy-bear guards with bat wings are all very well, but her dungeon cell is bo-o-o-ring! So, she decides to wile away the long hours by sleeping. Now if only she could get comfortable…and didn't suffer from insomnia...

(Source: VIZ Media)


Maoujou de Oyasumi has been licensed in English as Sleepy Princess in the Demon Castle by VIZ Media.

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More reviewsReviews

Dec 6, 2016
Shuc49 (All reviews)
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 read more
Jul 15, 2019
Nobody5464 (All reviews)
This story is a recent favorite of mine. It has this very charming and funny atmosphere that I just really enjoy and the princess goal of a relaxing sleep is something I can’t help but love.

All of the characters are funny and interesting and the level of the comedy and highjinks fluctuates nicely to keep the story enjoyable. The story manages to add new details and plot points but never gets to complicated or heavy making for something to read when you just want to relax and have a good chuckle. I hope this will get an anime adaptation at some point because it read more
Nov 21, 2019
Xavveina (All reviews)
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 read more
Mar 28, 2018
SovietWeeb (All reviews)
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 read more

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Recent Forum Discussion

Poll: Maoujou de Oyasumi Chapter 161 Discussion
Stark700 - Sep 12
2 replies by Syureria »»
Sep 12, 10:19 PM
Poll: Maoujou de Oyasumi Chapter 160 Discussion
Stark700 - Sep 7
3 replies by landofthekwt »»
Sep 8, 6:44 PM