TV series
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.
Streaming, rental and purchase options
Checked Jul 22, 2026
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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.
Choose an episode, then use the watch options above for the show.
Episode 1
Princess Syalis is abducted from her home of the Nation of Goodereste by Twilight the Demon King. Despite the horrors lurking in the Demon Castle, all Princess Syalis wants is a good night’s sleep.
Directed by Mitsue YamasakiWritten by Yoshiko Nakamura
Episode 2
As Dawner the Hero faces perilous obstacles to rescue Princess Syalis, the princess continues to find creative ways to sleep more comfortably at the Demon Castle.
Directed by Sumie NoroWritten by Yoshiko Nakamura
Episode 3
Princess Syalis is on the loose again meddling with forbidden magical items and causing total mayhem for the Demon Castle.
Written by Yoshiko Nakamura
Episode 4
Fed up with her circumstances at the Demon Castle, Princess Syalis goes to great lengths to add luxuries to her castle prison.
Directed by Geisei MoritaWritten by Michihiro Tsuchiya
Episode 5
The female unit, long deployed out in the field, has returned to the Demon Castle to get their first taste of Princess Syalis.
Directed by Sumie Noro, Takaharu OokumaWritten by Yoshiko Nakamura
Episode 6
Dawner the Hero is having more trouble than expected on his journey to the Demon Castle, so the demon higher ups decide to take some action.
Directed by Tatsuya NokimoriWritten by Michihiro Tsuchiya
Episode 7
Princess Syalis wakes to find herself in a completely different castle! What happened and how will she return to the Demon Castle?
Directed by Yoshiyuki Shirahata, Mitsue Yamasaki, Sumie NoroWritten by Yoshiko Nakamura
Episode 8
Back at the Demon Castle, Princess Syalis interrupts an important meeting to share about her haunted dreams.
Directed by Geisei MoritaWritten by Michihiro Tsuchiya
Episode 9
It’s time for Princess Syalis to start acting like a proper hostage, so the demon king issues a decree to help change that.
Directed by Hitomi EzoeWritten by Michihiro Tsuchiya
Episode 10
Princes Syalis is determined to get her hands on the latest and greatest sleep product, but it’s only available in the Human Realm.
Directed by Tatsuya NokimoriWritten by Yoshiko Nakamura
Episode 11
Princess Syalis feels tired no matter how much sleep she gets, and her troubling dreams aren’t helping.
Directed by Yasufumi SoejimaWritten by Michihiro Tsuchiya
Episode 12
Despite living as a captive in the Demon Realm, the princess writes a letter to Santa. The letter’s contents shock the demon king.
Directed by Mitsue Yamasaki, Sumie NoroWritten by Yoshiko Nakamura
Episode information updated Jul 23, 2026
Inori MinasePrincess Syalis (voice)
Kaito IshikawaDemon Cleric (voice)
Yoshitsugu MatsuokaDemon King Tasogare (voice)
Hiro ShimonoThe Hero Akatsuki (voice)
Rikiya KoyamaMajiro the Hedgehog (voice)
Kouichi SoumaFrankenzombie (voice) / Ghost Wrapping Paper (voice)
Junichi SuwabeCaesar Magician (voice)
Shinya TakahashiGoblin Serf (voice)
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