Attack on Titan is a Manga series created by Hajime Isayama and an anime series directed by Tetsurō Araki and produced by Wit Studio. It follows the story of Erin Jaeger, his two childhood friends, and the other cadets who go on to be member of the Survey Corps whom are the division of the military in the world of Attack on Titan specifically tasked with the evisceration and study of Titans in part due to their unprecedented understanding of vertical movement equipment.  For far more detail information, please be sure to visit our sister site, Mangainsider.com.