”In Mikado City, monsters known as Neighbors began appearing through gates and attacking the city. Nothing seemed to be able to defeat them, and many people died or went missing during the invasion. Suddenly, an organization defeated the Neighbors using Neighbor technology called Triggers. The organization, called Border, was then planted in Mikado City with its primary goal to defend the city against Neighbors.”

You have been Isekai’d into this world, what will you do?