is a 22-volume Japanese light novel series written by Gakuto Mikumo and illustrated by Manyako, published between May 2011 and August 2020. In June 2012, ASCII Media Works' Dengeki Daioh began serializing a manga adaptation. Between 4 October 2013 and 28 March 2014, Silver Link and Connect aired a 24-episode anime television adaptation in Japan. Between November 2016 and May 2017, four volumes of an original video animation series named Strike the Blood II were released. From December 2018 until September 2019, a third series named Strike the Blood III was released. From April 2020 to June 2021, a fourth series named Strike the Blood IV was published. Strike the Blood Last, the fifth and final season, will be published.