In 2019, Japan is about to change its era. A rift in another dimension suddenly appeared in the sky. There is a different world called "True Country Japan" where the world is reversed. The parallel world that maintains the past militarism and continues the Showa era forever uses the gas weapon "Phantom Mist" and the giant humanoid weapon "Galan" that make current weapons ineffective to invade our Japan militarily. Instantly take control of the government and achieve de facto conquest. We did not usher in the era of "Reiwa"...-Ten years later. As a vassal state of the True Country, the Fantasy Country Japan has been reborn. Under strict censorship, the subcultures such as comics, animation, and idols that were once popular have been completely extinct. However, the otaku is still not extinct! In order to protect the subculture, there is a group that is tit-for-tat with the True Country. This group is the secret society "Arabaq". The main weapon "Galandar" and the girls who fight as its power source. People call them battery girls...