Syalis is a princess. A really cute one. When she gets kidnapped by the Demon King as a hostage, she's stuck in a castle full of demons, waiting to be rescued by her knight in shining armor. So what does she do? What any of us would. Take a nap—on a pillow she fashioned from her Teddy Demon guards. Duh.
| Alternative Titles | Sleepy Princess in the Demon Castle, Sleepy Princess, Maou-jou de Oyasumi, Maoujou de Oyasumi, Maou-jou de Oyasumi, Maoujou de Oyasumi, Maōjō de Oyasumi, Maō-jō de Oyasumi, Сон в замку демона, Sleeping in Devil's Castle, Good Night at Demon Castle, Sleeping Princess in the Demon Castle, Sweet Dreams in the Demon Castle |
| First Air Date: | 2020-10-06 |
| Last Air Date: | 2020-12-22 |
| Number of Episodes: | 12 |
| Number of Seasons: | 1 |
| Genres: | Animation, Comedy, Sci-Fi & Fantasy |
| Status: | Ended |
| Networks: | $TV Tokyo |
| Casts: | Inori Minase, Kaito Ishikawa, Yoshitsugu Matsuoka, Hiro Shimono, Rikiya Koyama, Kouichi Souma, Junichi Suwabe, Shinya Takahashi, Chikahiro Kobayashi, Sayaka Ohara, Ayane Sakura |
