You thought your neighbors were bad...but at least they're not aliens trying to kill you!

Earth is under constant threat from Neighbors, invincible monsters from another dimension that destroy our way of life. At least we have the elite warriors of Border, who co-opt alien technology to fight back! Meet agent Osamu Mikumo, not the best, but along with his Neighbor friend Yuma, he’ll do whatever it takes to defend life on Earth as we know it.

Galopoula’s invasion is swiftly brought to an end thanks to an unlikely ally. The Rank Wars continues with Tamakoma-2 going up against B-Rank Katori and Kakizaki squads. Will the new techniques that Tamakoma-2 learned from their mentors be enough to help them win?