On the official site for the manga written and illustrated by Kagiji Kumanomata, Oyasumi's Maoujou, it was announced that the work will launch a fanbook (a series of works written by fans) on October 16 in Japan.
For its part, Kumanomata began publishing the manga in Shogakukan publisher's Weekly Shonen Sunday magazine in May 2016. The publisher published the fourteenth compilation volume on April 16 and the fifteenth on July 17.
The play is inspiring an anime adaptation produced by Doga Kobo Studios, directed by Mitsue Yamazaki and scripts written by Yoshiko Nakamura, scheduled to premiere in October this year.
Oyasumi's Maoujou Synopsis
Shhh! Princess Syalis is trying to get a good night's sleep. A long time ago, when people and demons coexisted, not in total harmony of course, a demon king kidnapped a human princess and locked her in his castle. Dispossessed, the princess's subjects thought incessantly of a solution ... until the hero emerges to lead the princess's rescue mission! While waiting for her knight in shining armor, what should an imprisoned princess do? Bat-winged 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 make herself comfortable ... if only she did not suffer from insomnia ...
© 熊 之 股 鍵 次 (著) / SHOGAKUKAN 小学 館