Dempagumi.inc has announced that it will be releasing a new single titled "Oyasumi Polaris Sayonara Parallel World / Girametasu Denpa Star" on April 4.
The new single will be the group's first as a 7-member group. It had added two new members, Rin Kaname and Nagi Nemoto, at the end of December 2017.
This will also be the first time the group has released a new single since 2016. Its last single "Sai Ψ Sai Kouchou!" was released on November 2, 2016.
Several new Ψ songs will be included on the single, including the track "Ψ Hakkenden" which is on all versions of the single.
3 versions of the single will be available upon release: a Regular Edition (CD-Only), a Limited Edition (CD DVD), and a 10-track Limited Edition (CD-Only).