While its author is not mentioned yet, the tweet suggests that it will be linked to Yuya Takashima’s spin-off novel Entangle:Girl published just one year ago.
The TV series’ compilation film Zegapain ADP was released on October 15, 2016, as the franchise’s tenth anniversary.
On August 31, which is a very important day in the story, the Zegapain anime franchise’s official Twitter announced that an all-new original hard science fiction novel is set to be released in 2021.