Kaibutsu Ōjo, lit., Monster Princess)is a Japanese horror comedy manga by Yasunori Mitsunaga. The manga was serialized monthly in Monthly Shōnen Sirius magazine and published by Kodansha.[1] A 26-episode anime series by Madhouse aired on TBS in 2007. Both the manga and anime are available in North America with the manga licensed by Del Rey Manga and the anime licensed by Sentai Filmworks and available on the Anime Network website. A new OVA series has been made by Tatsunoko Production with the first episode released in December 2010, along with the 13th volume of the manga, the second episode for the 14th volume, and the third episode for the 16th volume. A spin-off manga, Naqua-Den, which stars a side character from Princess Resurrection as the main character, was released in 2012 currently with two volumes. On November 25, 2017, a sequel of the manga, titled Kaibutsu Oujo Nightmare, was releasedHiro Hiyorimi is a boy who has just moved to the fictional Sasanaki Village to meet his sister who has been recently employed by a mysterious young woman who prefers being called "Hime". Hiro encounters Hime by chance when she and her short yet strong android bodyguard Flandre have arrived, getting himself killed in getting Hime out of harm's way of a speeding car (falling construction beams in the anime). But Hiro suddenly finds himself alive, initially confused as he encounters Hime and unconsciously defends her during her fight with a werewolf. Hime explains that she is a member of the royal family of the Monster Realm which co-exists with the Earth-Realm, revealing her family possess the power to temporary revive the dead as half-immortals bound to serve and protect them. Despite her disinterest, Hime is caught in a war of succession among her siblings for the Monster Kingdom's throne. The story then follows Hiro helping Hime fend off her siblings' supernatural assassins as they are joined by a half-werewolf named Riza and the vampire Reiri, Hime's younger sister Sherwo