Rumble Garanndoll

Japan, 2019-on the cusp of a new era. Without warning, a rift tears open in the sky, revealing a twisted reflection of the nation: "Shinkoku Nippon," a parallel world where the sky and earth are inverted. This alternate Japan clings to its past, frozen in an endless "Eternal Showa," its militarism unchecked. Their invasion begins with towering humanoid machines, the "Garann," and a sinister gas weapon called "Genmu," rendering modern defenses useless. Within moments, "Shinkoku Nippon" overthrows the government, seizing control of the real Japan. The dawn of "Reiwa" arrives not with hope, but under the shadow of conquest.