No Matter What, I'll be an Idol (The Last in Japan)!
Arahabaki brings in Yuki Aoba, the only survivor of an idol group named Rabbit Foot. She quickly accepts the chance to become a battery girl and gets Hosomichi to act as her manager. Hosomichi realizes there may be more to being a manager than he thought.
Aired 01/11/2021EP 4 - No Matter What, I'll be an Idol (The Last in Japan)!

2021
RUMBLE GARANNDOLL
Conquered by alternate-world invaders, Japan has become a shadow of what it once was. Manga, anime, idols, and more are censored by these parallel universe overlords...or so it seems. In the less-than-legal stores of Akihabara, Hosomichi joins a group of female freedom fighters made up of pilots and otakus.
(Source: Funimation)