When Armin asks him what he would do if the bomb blew up, Eren quietly muses that he would not mind if the bomb blew everyone up.
When Armin cautions Eren against going near it, Eren begins stomping on the missile, assuring them that the missile is a dud, before slipping off it, and falling to the ground.
Outside of town, Armin and Mikasa find Eren atop a missile embedded in the ground. On his way to see Eren, Armin stops at the house of his friend Mikasa, and invites her to see Eren. Armin dismantles it, and promises the boy that he will repair it and return it to him, to the boy's delight. As Armin leaves to go see Eren, he is stopped by a little boy, who is holding a device that is emitting a loud squealing noise. In the year 858, in Monzen, Armin is helping out at his parents' shop, and overhears that his friend Eren has been fired from his newest job. But even though the Walls have stood for one hundred years, there are no guarantees they will not fall today. The survivors built three massive concentric Walls to prevent another Titan invasion, and managed a peaceful life inside. Over hundreds of years ago, Titans suddenly appeared and devoured most of civilization. In one hundred years, the Wall has not been broken.until this day. The survivors of the war built three Walls to prevent the invasion of the Titans, and kept the peace by securing the living area inside. The majority of the human race was eaten and civilization collapsed.
More than one hundred years ago, Titans suddenly appeared.