Shingeki no Kyojin

Shingeki no Kyojin

 (Attack on Titan) 

by Hajime Isayama

 The history is located in a world where the last humans live protected within three great walls: Wall Maria (the exterior), wall Rose (the middle) and wall Sina (which protects the capital). The function of these walls, of 50 meters, is that the Titans, great creatures of 10 to 15 meters that eat humans and that have left humanity to the brink of extinction, don't enter.

The protagonist is Eren Jeager, a child who wants to see the outside world and dreams of joining the Legion of Recognition (the only part of the militia that can exit the walls). He, with his adopted sister Mikasa and his best friend Armin live in one of the most superficial cities of the Maria wall. One day it appears on the walls a titan of more than 50 meters that destroys the door of the wall, causing that the Titans enter inside the wall Maria.

 Eren saw his mother die  a Titan and then makes the decision to join the militia and kill until the last Titan.