The official website for the D4DJ announced that it will be receiving a second season titled D4DJ All Mix , which will premiere in the winter of 2023.
The season will feature all six musical groups from the universe, including Lyrical Lily. More information will be revealed later.
Below is an image that was released along with the announcement of the sequel:
D4DJ Double Mix special , the second anime in the franchise, will premiere this summer. The special will be a standalone episode centered on the Merm4id and Rondo groups.
The director of D4DJ First Mix, Seiji Mizushima , is now the chief director of D4DJ Double Mix at SANZIGEN Animation , while Daisuke Suzuki is directing. Both Merm4id and Rondo are collaborating on new songs specifically for the concert segment of the special, and Merm4id's music producer, Kazushi Miyakoda , is working on the music.
D4DJ First Mix, the first anime in the franchise, premiered in Japan in October 2020.
Source: ANN