Sleepy Princess in the Demon Castle poster

Sleepy Princess in the Demon Castle (2020)

Animation · Comedy · Fantasy

When young Princess Syalis is kidnapped and imprisoned by the Demon King, she's rather indifferent about her situation. But she quickly comes to a terrible realisation—she can't sleep soundly in such an uncomfortable bed! She soon escapes her cell and sets off in search of ways to improve her sleep quality, leaving the castle's inhabitants, and even the Demon King himself, scrambling to keep the unruly princess out of trouble during her chaotic adventures.

IMDb rating: 7.5 (1,030 votes)
Seasons: 1
Streaming (US): Crunchyroll
Language: JA
Type: TV series

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Ratings refreshed Aug 19, 2026 · 1 season indexed

Cast

Seasons

Season 1 (2020)

8.03 avg 12 episodes 7.5 → 8.3 23 min avg

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	Sleepless Princess of the Castle	7.5	72
2	The Princess and Furious Fluff	7.7	60
3	The Princess and Forbidden Knowledge	7.8	58
4	The Princess, Destruction, and a Short Journey	7.7	56
5	The Princess and Female Warriors	7.8	54
6	The Princess' Unwavering Choice	8.1	55
7	Even More Sleepless Princess of the Castle	8.6	62
8	The Princess and the Frightful Demon Nightmare	8.1	52
9	The Princess and Hostage Training Week	8.6	60
10	The Princess in Endopolis	8.2	51
11	The Princess and Troubling Dreams	8.0	53
12	Sleeping Princess of the Demon Castle	8.3	54