Hololive: Hoshimachi Suisei

It is the year 2021. One year has passed since the start of the last batch of the Hololive "Vtubers" has debut. Suisei ended up getting warned by an anonymous man named Neptear, a man who previously had finished his base months prior to the Phantom Thief incident. Unknown to her, she was met by him during her concert, which moments before the start of her company's fall, was the beginning of the end.