Have you ever heard of this before? A Neighbor accepted within Border, the organization where most of the members hate Neighbors for the damage and harm they have caused four years ago in the First Large-Scale Neighbor Invasion. And not only is that Neighbor a Humanoid Neighbor, but he is also a respected S-Ranked member of this organization and one of the founders of Border. Tracing back ten years from the original beginning of the story, the protagonist of this story, Yatori Yumitaka (real name: Eleftheria) arrives at the world we live in and know, in which he calls Meeden. Bearing many burdens on his back, he faces danger almost every day until he met the father of the original work's protagonist, Kuga Yuuma, on this fateful day. How will he overcome enemies that have chased him for almost as long as he could remember? And how will he face his own past when he is confronted by it? This work, World Trigger, belongs to its rightful owner, Ashihara Daisuke-sensei. The only things I own are the extra details I added into the plot and my OC.