Attack On Titan

"Attack on Titan" (進撃の巨人 Shingeki no Kyojin?) is a 2013 anime series based on the manga by Hajime Isayama serialized in Bessatsu Shōnen Magazine. It is set in a world where humanity lives inside cities surrounded by enormous Walls due to the Titans, gigantic humanoid creatures who devour humans seemingly without reason. The story centers around Eren Yeager and his adoptive sister Mikasa Ackerman, whose lives are changed forever after the appearance of a Colossal Titan which brings about the destruction of their home and the death of their mother. Vowing revenge and to reclaim the world from the Titans, Eren and Mikasa join the Survey Corps, an elite group of soldiers who fight Titans outside the Walls.