A Dark Rabbit Has Seven Lives (いつか天魔の黒ウサギ, Itsuka Tenma no Kuro Usagi, lit. "The Devil's Black Rabbit of an Unknown Time") is a Japanese light novel series by Takaya Kagami, with illustrations by Yū Kamiya. The series includes 13 novels published by Fujimi Shobo between November 2008 and December 2013. The series also has a spin-off series, Kurenai Gekkō no Seitokaishitsu (紅月光の生徒会室, lit. "Gekkō Kurenai's Student Council Room"), which has five volumes since February 2010. A manga adaptation by Shiori Asahina began serialization in the shōnen manga magazine Monthly Dragon Age on October 9, 2009. A 12-episode anime adaptation aired between July and September 2011.
Kurogane Taito is a freshman in Miyasaka High. After an injury that prevented him from practicing karate, which he excelled in since elementary school, he had always believed that he was an ordinary, regular guy. However, due to a forgotten promise exchanged with a beautiful Vampire, (Most Ancient Sorcerer) named Saitohimea, nine years ago, he was in fact no longer ordinary. Taito later went on to regain his memories after a certain incident, and was reunited with Saitohimea. Along with unlikely allies, Kurenai Gekkou, Miyasaka High's student council president and a genius bent on avenging his parents, and Andou Mirai, a cute lightning demon and familiar of Gekkou, they have to contend against Gekkou's twin brother, Kurenai Hinata, who sought to resurrect the powerful Vampire (Most Ancient Sorcerer) Bahlskra. Unknown to them, their destinies were already woven and foretold in an ancient prophecy of epic proportions.
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