World Trigger (2014 Anime Series) - Season 3 - Episode 1

A gate to another dimension opens in Mikado City, unleashing monsters called "Neighbors." Earth's weapons are useless, but a mysterious Border Defense Agency appears, using alien Trigger technology to fight back. Years later, Border agent Osamu Mikumo meets Yūma Kuga, a powerful humanoid Neighbor in disguise. They team up with sharp-shooter Chika Amatori, navigating agency politics and battles to protect their world.