Maoujou de Oyasumi (Sleepy Princess in the Demon Castle)

Maoujou-de-Oyasumi-KV-e1601598346417 Maoujou de Oyasumi  (Sleepy Princess in the Demon Castle)

Maoujou-de-Oyasumi-KV-e1601598346417 Maoujou de Oyasumi  (Sleepy Princess in the Demon Castle)

Maoujo de Oyasumi

Comedy, Fantasy, Magic, Shounen, Slice of Life, Supernatural

Airing Date:
Fall 2020

Doga Kobo

Promotional Videos / PV

Official Images / Key Visuals


This story takes place in a time where humans and demons co-exist. One day, the demon king kidnaps the human princess on his path toward world domination. The civilians become enraged and one man - a hero - eventually steps forward and vows to rescue her.
In the castle where the princess is being held, she finds herself utterly bored. The only thing left for her is to rest, but she can't seem to fall asleep.

Characters & Voice Actors

Princess Syalis: Inori Minase

Kaymin is the country where all humans live and Princess Syalis is a member of the royal family. The demon king refers to her only as her title “princess” but by the people she is called “Princess Syalis”. She is held hostage in the demon castle, but her prison is quite a good one in terms of providing her with food, clothing et cetera. She ends up having way too much time on her hands however, and she sets out to try to find a way to get a good night’s sleep.
Demon King Tasogare: Yoshitsugu Matsuoka

He is the demon who kidnapped the princess. He claims that he can, and will bring all the power divided between humans and demons into his own hands, but in reality the thing he’s most interested in are those that you, in a RPG, would refer to as “event flags” “combat balance” and “game balance”. Thus, he is doing everything he can to make it difficult for the hero, Akatsuki to reach him and he's consistently making use of his hobby to make sure there are no failures/setbacks.
Demon Cleric: Kaito Ishikawa

He’s the demon who’s the top of the area within the demon castle that’s referred to the “demon church”. He looks like a gentle and calm young boy, but he’s in fact much older than even the demon king. He has a position within the castle that’s equal to the demon king, and ever since the princess came to the castle he’s been incredibly busy. Ever since her arrival, deaths have skyrocketed in the castle, so he’s had to work on revivals nonstop, bringing him to the edge of total exhaustion.
The Hero Akatsuki: Hiro Shimono

He is the hero who has set out to save the princess. He has a history of feats and is very trusted by the people of Kaymin. He’s also the princess’ fiance, however she hates him to the point where she won’t even remember his name.

Other TitleSleepy Princess in the Demon Castle
Main Staff
  • Original Creator: Kagiji Kumanomata
  • Director: Mitsue Yamasaki
  • Series Composition: Yoshiko Nakamura
  • Character Design: Ai Kikuchi

For more information: Official Website

(Credit Honey’s Anime when you use our description.)