You thought your neighbors were bad. . . but at least they're not aliens trying to kill you!. . Destroy thy Neighbor! A gate to another dimension has burst open, and invincible monsters called Neighbors invade Earth. Osamu Mikumo may not be the best among the elite warriors who co-opt other-dimensional technology to fight back, but along with his Neighbor friend Yuma, he'll do whatever it takes to defend life on Earth as we know it. . . With the final matches of the B-Rank Wars coming up, Tamakoma-2 gets its chance to go up against Suzunari-1, Azuma Squad and Kageura Squad again. This time is different--Hyuse is an official member of Tamakoma-2 and ready to shake up the competition. But Suzunari-1 has a trick up their sleeve when Taichi suddenly cuts the lights in the arena, causing a total blackout.