In World Trigger, Vol. 20, Earth is invaded by Neighbors, monsters from another dimension. Osamu Mikumo and his Neighbor friend Yuma fight to defend Earth alongside elite warriors using other-dimensional technology. With the B-Rank Wars approaching, Tamakoma-2, now with Hyuse, faces Suzunari-1, Azuma Squad, and Kageura Squad. But Suzunari-1 has a surprise in store when Taichi plunges the arena into darkness. Can Tamakoma-2 overcome this new challenge?