The official website for the forthcoming TV anime adaptation of Kagiji Kumanomata's fantasy comedy manga Maoujou de Oyasumi / Sleepy Princess in the Demon Castle has posted a first key visual and a 60-second first PV, announcing its premiere on TV Tokyo, BS TV Tokyo, and AT-X in October 2020.

The key visual features the sleeping Princess Syalis and the sleeping bear in the center, as well as the residents of the Demon King's Castle and the Hero Akatsuki. Meanwhile, the clip introduces a scene that the Princess Syalis, who is imprisoned in the castle, is searching around to find a good place to sleep. 

The TV anime adaptation is directed by Mitsue Yamasaki (How Heavy Are the Dumbbells You Lift?), alongside series composition writer Yoshiko Nakamura (The Helpful Fox Senko-san) and anime character designer Ai Kikuchi (NEW GAME!). Doga Kobo works on anime production.

Main voice cast:

• Princess Syalis: Inori Minase
• Demon King Tasogare: Yoshitsugu Matsuoka
• Demon Cleric: Kaito Ishikawa
• The Hero Akatsuki: Hiro Shimono
• Majiro the Hedgehog: Rikiya Koyama

Synopsis (via: the manga's English edition publisher VIZ Media):

She decides to while away the hours by sleeping, but getting a good night’s rest turns out to be a lot of work! She begins by fashioning a DIY pillow out of the fur of her Teddy Demon guards and an “air mattress” from the magical Shield of the Wind. The princess’s hapless demonic guards soon discover that their captive expects to be treated like, well, a princess. Things go from bad to worse—for her captors—when some of Princess Syalis’s schemes end in her untimely—if temporary—demise and she chooses the Forbidden Grimoire for her bedtime reading…

Source: TV anime "Sleepy Princess in the Demon Castle" official website / Twitter

©Kagiji Kumanomata, Shogakukan/The Demon King Sleeping Promotion Committee