A spin-off manga series, Naqua-Den, was serialized in Monthly Shōnen Sirius from February 2012 to September 2014, with its chapters collected in six tankōbon volumes.

Hiro Hiyorimi is a boy who has just moved to "Sasanaki Village" to meet his sister, who has recently been employed by a mysterious young woman that prefers to be called "Hime".

[13][14] A spin-off manga series, titled Naqua-Den [ja] (南Q阿伝, Nakuaden), was serialized in Monthly Shōnen Sirius from 25 February 2012 to 26 September 2014.

[18][19] A sequel series, titled Princess Resurrection Nightmare (怪物王女ナイトメア, Kaibutsu Ōjo Naitomea), was serialized in Monthly Shōnen Sirius from 25 November 2017 to 26 March 2021.

[26][27] A 26-episode anime television series adaptation, produced by Madhouse and directed by Masayuki Sakoi, was broadcast on TBS, BS-i, and KBS Kyoto from 13 April to 28 September 2007.

[80] Three original video animation (OVA) episodes, produced by Tatsunoko Production, were bundled with the limited-edition of the 13th, 14th and 16th manga volumes, respectively, which were released on 9 December 2010;[81] 9 March;[82] and 7 October 2011, respectively.

[83] In Jason Thompson's online appendix to Manga: The Complete Guide, he describes the series' plot as being "fun and fast-paced", with "imaginative" action scenes.