Gyakuten Sekai no Denchi Shoujo
English title: Rumble Garanndoll
Japanese title: 逆転世界ノ電池少女
Type: TV
Episodes: 12
Premiered: fall 2021
Source: Original
Genres: Action, Comedy, Sci-Fi
Studios: Lerche
Producers: Studio Hibari, Lantis, AT-X, Tokyo MX, BS11, Egg Firm, Quaras, Kadokawa, Bandai Namco Arts, MAGNET, Scarlett
Duration: 23 min per ep
Rating: PG-13 - Teens 13 or older

Japan, 2019, just before the dawn of a new era. Suddenly, a rift to another dimension appears in the sky, revealing an alternative world "Shinkoku Nippon," with the sky and the earth upside down. This parallel world keeps their former militarism, with its era being Eternal Showa. The military invades the real Japan with giant humanoid robots called "Garann" and their gas weapons "Genmu", rendering our modern weapons ineffective. "Shinkoku Nippon" instantly seizes the government and achieves de facto conquest of Japan. The new era, "Reiwa," has now arrived for Japan.

(Source: MAL News)