The year is 2845. It's been nearly 2000 years since the Battle of Heaven and Earth ended. Humanity has progressed and thrived in a modernized world now. But the world has forgotten about The Rumbling, or the former existence of the power of titans, because of several wars that destroyed all the evidence throughout the years. But there is something unique about this world. Those that lived all those years ago have reincarnated in this modern world with the same names and appearances as before, but their personalities differ slightly. Unsurprisingly, no one seems to have any memories of their past lifes. Except for someone. Eren Yeager. Follow this story to find out how Eren got his memories back and how he'll proceed with his life from there on.