Maoujou de Oyasumi

Sleepy Princess in the Demon Castle

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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: TV
Episodes: 12
Status: Currently Airing
Aired: Oct 6, 2020 to ?
Premiered: Fall 2020
Broadcast: Tuesdays at 02:00 (JST)
Producers: Lantis
Licensors: Funimation
Studios: Doga Kobo
Source: Manga
Genres: Slice of LifeSlice of Life, ComedyComedy, SupernaturalSupernatural, MagicMagic, FantasyFantasy, ShounenShounen
Duration: 23 min. per ep.
Rating: None


Score: 7.591 (scored by 64696,469 users)
1 indicates a weighted score.
Ranked: #13232
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #2376
Members: 42,111
Favorites: 126
Ranked #1323Popularity #2376Members 42,111
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Episodes: /12
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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)


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Related Anime

Characters & Voice Actors


Nakamura, Yoshiko
Series Composition
Nakamura, Chieko
Art Director


Opening Theme

"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

Oct 26, 2020
xamantra (All reviews)
It's a wholesome and fun slice of life comedy show with a unique concept and unique main character girl. She's not the usual cute girl you see in every show with a girl MC. She has this certain smug look or strict looking eyes that makes the demons have some interesting reaction every time they see her. It's really fun. You have to take note that this show is repetitive, a hit or miss for some people. This show is like a game. The MC's goal is to sleep comfortably by acquiring some required items to build something related to sleeping like a bed, cover, read more
Oct 26, 2020
Ellenwitch (All reviews)
There is a lot of care and charm when it comes to this show. You wouldn't think such a simple concept would come off so well as it does here. For now at least, it's doing well, but there is the issue that it will become repetitive. But it has been a great watch so far, and here is why!

The story is pretty simple, princess is captured and kidnapped and taken into a demon castle to be held prisoner, and for a hero to go on a journey to save her. But all of that basically goes out the window, as we're here to watch read more
Oct 28, 2020
Bao_GG (All reviews)
I didn't expect myself to like this anime, that's about a captured princess who wants to sleep like it's heaven in the ruthless demon king's castle. I actually loved the parts where she uses her comb to ring the cell bars to call for the teddy demon bears to get the cell keys. And also the anime is actually wholesome which makes me get good vibes from it.

To an extent I hope it keeps moving at it's pace cus I think it's actually doing well.

I personally actually enjoy the show but I don't read more
Oct 27, 2020
Black_Cat03 (All reviews)
I honestly did not expect anything from this anime and that is exactly why I loved this show so much.

Story 7/10: The plot, wow. A princess that just wants to sleep peacefully and doesn't care about her other responsibilities, it's just hilarious how she tries different methods just for a good night's sleep.

Art 7/10: Cute, colorful and eye catching but it also fits the dark theme of the Demon Lord. The balance between wholesomeness and darkness was somewhat good.

Sound 7/10: I liked the opening and ending themes, kind of catchy and would listen to it while walking around the streets.

Character 8/10: I loved the characters, read more

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