It all happened after the grand adventure that was NUKITASHI... The war is over, and Junnosuke Tachibana, savior of Seiran Island, spends his days with his buddies reminiscing over victories past. True coexistence has now been achieved, and peace will continue for years to come—or so he believes. One fateful day, a grave data-related incident results in him breaking through the speed of light, transporting Junnosuke and his friends to a parallel world.