It has been reported that the first compiled Blu-ray volume of the animated manga adaptation was written and illustrated by Kagiji Kumanomata, Oyasumis Maoujou ((Sleepy princess in the demon castle) reached 1,093 copies sold in the first week since its launch.
This volume was released on December 16 in Japan and contains the first to fourth episodes of this series. This Blu-ray tape also includes an artwork booklet, a ticket to a special June 2021 event, and a few other benefits, and is priced at 15,400 yen (approximately $ 148).
The series premiered on October 5th in Japan and confirmed with a total of twelve episodes. For his part, Kumanomata began to publish the manga in the magazine Weekly Shonen Sunday from the publisher Shogakukan in May 2016.
- Mitsue Yamazaki ((Dumbbell nan-kilo moteru?, Tada-kun wa Koi wo Shinai) is responsible for directing the anime in the studios Doga Kobowith the support of Sumie noro.
- Yoshiko Nakamura ((Kabukibu!, Hiiro no Kakera - The Tamayomi Princess Saga) is responsible for writing and monitoring the scripts.
- Ai Kikuchi ((New game!, Dumbbell nan-kilo moteru?) is responsible for the character design, with Chiaki Nakajima as a character sub-designer.
- Yukari Hashimoto ((3-Gatsu not a lion, Osomatsu-san) is responsible for composing the soundtrack.
Oyasumi's Maoujou summary
Pssst! Princess Syalis tries to sleep well. A long time ago, when humans and demons coexisted, of course not in complete harmony, a demon king kidnapped a human princess and locked her in his castle. Undressed, the princess's subjects kept thinking of a solution ... until the hero shows up to lead the princess's rescue mission!
What should an imprisoned princess do while she waits for her knight in shining armor? Bat wing teddy bears aren't bad, but their cell is so boring! Then she will decide to spend the long hours sleeping, if only she could be comfortable ... if only she doesn't have insomnia ...
© 熊 之 股 鍵 次 ・ 小学 館 ／ 魔王 睡眠 睡眠 睡眠 （（（）