Attack on Titan: Lost Girls

Attack on Titan: Lost Girls is a Japanese novel written by Hiroshi Seko. The book is a spin-off of the manga series Attack on Titan by Hajime Isayama. A manga adaptation began serialization in August 2015 and ran until May 2016. A three-part original animation DVD adaptation was released on December 8, 2017, April 9, 2018, and August 9, 2018, with the 24th, 25th, and 26th limited edition volumes of the original manga, respectively.